In Europe, extensive work on wireworms has revealed taxonomic problems in the genus Agriotes. Since the investigations of Roberts (1922) after the First World War it has been possible for both field men and taxonomists to identify the larvae of A. sputator (L.), but the problem of separating A. obscurus (L.) and A. lineatus (L.) has persisted through all subsequent work. The European literature on Agriotes larvae deals extensively with the latter problem (Beling, 1883-84; Ford, 1916; Guéniat, 1934; Henriksen, 1911-12; Horst, 1922; Korschefsky, 1941; Mesnil, 1930; Rambousek, 1928; Schaerfienberg, 1943; Subklew, 1934; and Znamenskij, 1927), but none of the authors expresses satisfaction with the characters found.

In this paper records are given for three species of leafhoppers described from Europe and not recorded previously for North America, and six names that have been applied to North American species are reduced to synonymy with the names of species described from Europe.

The genus Metaxmeste Hübner [1824-25] was erected for four nominal species. There was no original type designation, and so far as I know there has been no subsequent one; accordingly, I designate Pyralis phrygialis Hübner as type. This species, though included in Titanio Hübner by most authors, differs from normalis Hübner, the tvpe of Titanio, in the less prominent frons, in lacking specialized setae on the ddrsal surface of the antenna, and in having Sc+R completely free from Rs in the hind wing. I consider these characters to be of generic importance.

The genus Carphoborus is widely distributed in the Holarctic realm. It occurs from the northern limits of tree growth south in the Old World to India and northern Africa and in the New World to Baja California, New Mexico, Mississippi, and Florida.

All of the North American species breed in the inner bark of coniferous trees of the genera Pinus, Picea, and Pseudotsuga. Branches that are being shaded out or are broken, but still hanging in the tree, are generally preferred for the construction of galleries. A few species have been reported from slash; however, they are usually not aggressive or abundant enough to survive in competition ivith other bark beetles normally found in slash. The economic importance of the genus is not great; the hahit of breeding in the unthrifty lower branches of coniferous trees contributes slightly toward accelerating the natural pruning of the trees and consequently aids in the production of a higher quality of timber.

During the past decade, larvae of the housefly, Musca domestica L., have been reared routinely in a medium containing two parts of wheat bran and one part of alfalfa meal, moistened with a yeast suspension and a solution of malt euuact. The recent appearance of a standard mixture of wheat bran (33.3 per cent), alfaIfa meal (26.7 per cent), and brewers grain (40.0 per cent), called CSMA (formerly NAIDM), has further simplified the rearing of this species of fly. This note reports a modification of the CSMA medium and its use in the sterile culture of housefly larvae.