I may give an addition to my note (June, No. 6, p. 120, 1884). During the last seventeen years this beetle has never been rare in Cambridge, Mass., but never so overwhelmingly common as this year. As this elegant beetle was the first I had collected here in October, 1867, it had become my pet, and I paid some attention to it every year. This year it was very common on a long board fence in Ware St., which I have to pass four times every day. The fence surrounds a large garden with many elm trees near. when I heard that the beetle had been very destructive to elm trees in some places on the north side of the College grounds, and that it had nearly denuded some trees in Sommerville, I gave closer attention to it. Till June the leaves of the elms in Ware St. were comparatively uninjured. Then appeared the second brood of larvæ, and very soon the leaves were honeycombed with more or less round holes, and turned yellow prematurely. The larvæ were first described by Harris, Injur. Ins., 1841, and the same repeated in all following editions; the edition of 1862 gives a figure of the larva and beetles.

One morning last November I went to the Chaudiere Curve, to meet the train from Halifax, which had been delayed for some hours. I found two men in the waiting-room who had spent the night there. They complained that swarms oi black beetles had troubled them all night so that they courld not sleep. Upon my questioning the correctness of the statement, they said, “Well, here they are in all the cracks,” and they forthwith commenced to poke the creatures out'. The insects were numerous enough, but they were not beetles, nor were they black. They were specimens of the German Cockroach, Ectobia Germanica. I afterwards enquired of one of the railway employes as to the time of the first appearance of the insects. The man told me that he first noticed them in 1882. I asked if they had appeared anywhere else in the neighborhood. “Yes,” he answered, “in my own house last winter; but,” he added, “I am not there in the day time, so I left the windows open and froze them out.”

Egg.—Diameter, .06 inch. Shape spheroidal, the transverse diameter being about one fifth more than the longitudinal; striated longitudinally with 28 striæ, 15 of these reaching the shallowly punctured apex, these ridges being crossed with a network of slight elevations, the transverse and the longitudinal lines in the middle of the hollows making squares, the interior of these squares being roughened, the corner of each square a little more elevated and enlarged than the sides. Color brownish olive. Duration of this period 234 days.

Young Larva.—Length .25 inch. Color pale gray, one prominent purplish black dorsal line and three less distinct lines on each side. Head purplish black, piliferous spots and hairs the same color. Venter paler than above, with a dark spot in the centre of each joint. Feet, 12. Duration of this period 6 to 7 days.

The eggs of butterflies are very interesting objects. As a rule, those of each natural genus (I speak of the North American fauna, for I know nothing of the eggs of tropical butterflies), are closely alike, as in Pieris, Anthocharis, Colias, Terias, Callidryas; and so, while each genus has peculiarities of its own, there is a family resemblance between these genera (of the sub-family Pierinæ). They are all of one general shape, long, slender, sub-conic, or spindle-shaped, set on end, but differently ribbed according to the genus. So the eggs of Danais and Heliconia and Agraulis each have their own pattern. A11 Argynnis eggs, whether of the large or small species (Groups 1 and 2), are thimble-shaped. On the other hand, Euptoieta, by its egg, is allied to Argynnis, while by the chrysalis, it is allied to Melitæa. It links the two genera, and in my Catalogue of Di. Lep., I place it between these two, instead of before Argynnis, as has usually been the arrangement. So Melitæa, Phyciodes, Limenitis, Apatura, Paphia, Satyrus, Neonympha, Chionobas, may all be distinguished as readily by the eggs as by the butterflies. Lycæna, Lemonias, Thecla, Chrysophanus, so far as I know them, all show generic peculiarities in the egg stage. So does Papilio, though some of the species, as Philenor and Cresphontes, have the surface covered with a rough crust, the usual type being smooth-surfaced.

In the first number of this volume one of your contributors, Mr. Clarkson, writing about Citheronia regalis, infers that the moth always appears about the end of May, regardless of the time at which the larva enters the earth, and that it is the habit of the pupa to work out of the earth and lay on the surface of the ground during the winter. The first statement is correct in a certain sense. The insect in question is not uncommon here, and I have had them in numbers. Take a larva captured the first week in August and another the last in September, and allow them to pupate in the same box and to remain together—they will disclose within a day or two of each other; but whether at the last of May or at some other time, depends on the temperature at which they have been kept. Keep the pupa of the one taken in August at a temperature a few degrees lower than that of the September one, and it will disclose much later, perhaps about the time the offspring of the other are entering the earth. I had one pupa that did not disclose till June of the second year. The time of development seems to largely depend on the temperature that surrounds the pupa—a fact that is well known.

The species in the following list were taken in Fairmount Park during the past summer, and mainly during May and June, which is the best time for Syrphidæ; then there are some which only appear in the fall months. Of all families of Diptera the Syrphidæ seem to be better represented in the Park than any other families of this order, perhaps with the exception of the Dolichopodidæ. The Syrphidæ seem to prefer damp and somewhat open woods, especially a small wood that has a small rivulet running through, near the border, and where there are patches of May apple, with the sun shining through the trees on the plants. This only applies to some species, for others prefer the borders of woods, fields, etc. I never found many Syrphidæ in a hot and sandy county, for instance like New Jersey, but what it lacks in Syrphidæ it makes up with the Bombylidæ, for last summer I took about ten species of the latter family in one day, while I only took about seven species the whole summer in Fairmount Park.

On the 22nd of August, 1882, while entomologizing along the border of a wood at Oak Hill, New York, I was agreeably surprised by a call from a lady companion—an earnest devotee of the floral kingdom, who was but a few yards distant in the pursuit of her favorite study—that she had discovered something which she appeared to regard with that sort of honor which one might bestow on a venemous reptile. Knowing her dislike of all crawling things, I at once conjectured that the cause of the alarm was a spinous caterpillar, and that my attention, no, doubt, was being directed to that over which I at least would be enthusiastic. It proved to be the formidable looking larva of this moth, popularly known as the Hickory Horned Devil, and on account of its rarity, a goodly, and in no sense an evil sight to a naturalist. It was found feeding on the hickory. It burrowed a few inches into the earth on the 19th of September, to transform, and two days thereafter the pupa worked itself to the surface.

I have often read articles about keeping parasites out of cabinets, and have seen in many entomological papers different remedies suggested to keep them from destroying, in a very short time, even the largest collection. I will now add my own experience, and remedy which always proved to be efficient during my 14 years' collecting, in which time I have not even lost one specimen. It will especially prove of interest to the beginner. In the first place I would advise all those who cannot afford a large cabinet with good fitting drawers, to go to any good joiner and have some boxes made after the following pattern: Take the lumber about three-sixteenth inch thick for top and bottom, for the sides quarter of an inch. Have the box about 15 inches long by 12 inches wide, and 4 inches thick outside measure, and shape it book form, the bottom and top a quarter of an inch projecting. That portion which represents the cover of the book is cut into lengthwise, so as to make two receptacles, each about two inches high.

These beetles were very abundant at Oak Hill, Columbia Co., New York, during the months of July and August, in the several years of 1875 to 1882. Harris states that the larvæ feed on the trunks and roots of the Balm of Gilead and Lombardy Poplar. Oak Hill is a part of the old Manor of Livingston, and is notable for the variety and age of its oaks. Upon the lawn immediately in front of the dwelling are two ancient trees of the black oak variety, one of which is supposed to be two hundred years old. From the roots of these o1d trees these beetles would emerge during the first two weeks in July, usually appearing just after sun-down, or in the darkness preceding a shower. During the sun-light, the closest observation of the short cut lawn skirting the trees, would not reveal a beetle, but so soon as the sun rested behind the towering Catskills, these revellers of the twilight and the darkness would come forth. Their presence is quickly realized by the odor of the ♀, which is very powerful, and can readily be detected twenty feet distant.

On the 27th of September, 1882, while riding through Mt. Hope Cemetery, near Bangor, the leaves on several trees of Basswood (Tilia Americana) were observed to be rolled in a peculiar manner, and to contain a green larva with a black head, which I supposed at the time to be that of some Tortricid; but it quite puzzled me, as it was larger than the larva of any Tortricid in this region with which I was familiar. Miss Murtfeldt, who was riding with me at the time, said that she had seen the leaves of Basswood attacked and rolled in precisely the same manner in Minneapolis, but failed to secure any of the larve.

Having been away from home the greater part of the summer, I regret that I have not been able to collect some of these beautiful beetles this season, so as to further observe the interesting relation between the varieties in number, as I should like to have done. I hope, however, that some one has made observations upon them, and will favor us with an account, which would, no doubt, be very acceptable to those interested in the genus.

Since contributing the first notes upon this subject, I have noticed that Say has described two varieties of C. sex-guttata in his monograph of the genus Cicindela, commencing on page 415, vol. ii., of the American Entomology, edited by LeConte. The first is.

Egg laid on the under side of the reaf of the Dock (Rumex obtusifolius). Newly hatched larva bites through to the upper surface of the parenchyma, and works under the epidermis, until the leaf presents a blistered appearance. sometimes three or four larvæ are found in one leaf.

Full-grown larva, four-tenths of an inch long, white, semi-transparent. Segments marked with greenish yellow. Head retractile, furnished with a snout-like process, the apparent use of which is to raise the epidermis as the creature feeds. Mouth set back. Alimentary canal visible under the microscope, also two ducts terminating in spout-like organs protruding from what appears to be the upper edge of the somewhat truncated last segment of the larva. The tuberculose spiracles on the second segment very conspicuous; on the third, less so, and so on diminishing.

Chrysomela labyrinthica, Lec. This insect is, I believe, by some entomologists thought to be a variety of C. scalaris, Lec. I incline myself to the belief that it is a distinct species, but my knowledge of it is too limited for me to form a decided opinion. Both forms occur here; scalaris is common wherever basswood or elm are found; labyrinthica is scarce, and as far as my experience goes, is confined to one locality, viz., that portion of the Mountain Park lying between the head of Redpath Street and the road through the Park. I have only found labyrinthica during the early part of summer; scalaris occurs both in spring and fall. Mr. Moffat, who records labyrinthica from Hamilton (Can. Ent., vol. xiv., page 57), took a specimen on May 23rd, and found its season to last about four weeks, during which he took over a dozen. It appears to be very rare, and is in very few lists. Mr. Pettit does not give it in his Grimsby List. Mr. D'Urban records scalaris common at Montreal, but does not mention labyrinthica. The same author, in his list from the Valley of the River Rouge, gives scalaris as “abundant on alders throughout the district, from the end of June to the end of September,” but says nothing of labyrinthica. Mr. Ritchie gives both scalaris and labyrinthica in his Montreal List, but without dates.

Lamesis Westw. Tijdschr. voor Entom. xxvi., p. 67. I would call attention to the possible identity of this genus and Xenorhipis Lec. The figure given by Westwood (pl. 3, fig. 8) certainly bears a very close resemblance to that published by me of Xenorhipis (Trans. Am. Ent. Soc. 1882, pl. iv., fig. 7, 8). If the two should prove identical, the name given by LeConte (Proc. Acad. 1866, p. 384) should have priority.