Early in 1928, at Salmon Arm, B.C., a thirty foot tree of Vine Maple (Acer circinatum Pursh.) which had been dead for three years, was found to be infested with Ceranibycid larvae. Accordingly the tree was felled, cut into two-foot sections, and portions from six inches to half an inch in diameter were put into a wire-screen cage under as natural conditions as possible, and in the shade. As it happened, this shady position seems to have been well chosen, as of seventeen infested maples examined during 1928-1929 only two occurred in the sun.

The insects of this genus are all North American and are strikingly distinct from all other forms in this region in their almost hemispherical outline and leathery opaque elytra. Although they jump with great agility, when seen strutting about on their broadly foliaceous legs they appear awkward and grotesque in the extreme. They rest on the stems of the shrubs head upwards and the body inclined outwards at about a 30-degree angle.

Description of the adult female. Dark brown in colour; 2.00 mm. long, 2.62 times as long as wide, allied to ponderosae Blackm.

Front of the head plano-convex below, closely, moderately finely punctured, coarser and sparsely on vertex, the interspaces between the punctures minutely reticulate; longitudinal carina moderately strongly developed and elevated, extending from the slightly arcuate epistomal margin up to a level of the upper angle of the eyes; indistinctly clothed with short yellow hairs.

The following survey is based on collections made in Iowa from March, 1929 to February, 1930. It isnot all-inclusive, as intensive collecting was carried on in only a very small area in central Iowa, in the vicinity of Ames. It is hoped however, that the list will be of value in extending the limits of distribution of several species.

During the summers of 1928 and 1929 a study was made of the mayfly fauna of several streams and lakes in Ontario, particular attention being given to associating the nymphal stages with the adults by rearing them in cages set in the stseams. In the course of the work the nymphs of twelve species, hitherto unknown in this stage, were found. These are described below. Three new species were taken and are also described.

I have just received from Professor M. L. Fernald two papers of extra-ordinary interest, on “Some Relationships of the Floras of the Northern Hemisphere” (Proc. Internat. Congress of Plant Sciences, 2, pp. 1487-1507, 1929) and “Unglaciated Western Newfoundland” (Harvard Alumni Bulletin, Jan. 23. 1930, 6 pp.).