March, igii.] FeLT : GENERIC SYNOPSIS OF IxONIDyE. 31 I have never seen specimens of Van Duzee's two species and the diagnostic characters are taken from his description. A. pluto Uhl., if a distinct species, is difficult to characterize except with compari-son to A. curinns. I have seen A. conspcrsus Mont, confused in col-lections with Tolliiis curtiihis Stal, which I have taken at Kings-bridge, N. Y. A GENERIC SYNOPSIS OF THE ITONID^. By E. p. Felt, Albany, N. Y. As there is no complete synopsis of this group, better known as the Cecidomyiidae, extant we take this opportunity of presenting, in a summary form, the results of our studies of American species, many of the types of European genera and a close examination of the literature describing other forms. Subfamily Lestremiin^. Small, dark brown or black species. Tarsi quinquearticulate, the first segment longer than the second ; fourth vein usually present, forked, or simple ; crossvein distinct ; antennae moderately developed or greatly reduced; circumfili never present. Tribe LESTREMINARIJE. This tribe is distinguished from the following by the fourth vein being forked. Genus CATOCHA Halid. 1833, type C. latipes Halid. Costa continuous and extending beyond the apex of the wing. Antennae with ii or more segments, the second not plainly enlarged. Synonyms: Fnrcincrva Rond. 1846 in part, Macrostyla Winn. 1846. Europe, North America. Genus LESTREMIA Macq. 1826, type L. cinerea Macq. Costa not attaining the apex of the wing, practically disappearing at its union with the third vein. Male with 16. female with 11 an-tennal segments, the second not plainly enlarged. Synonyms : Ceci-dogona Loew 1844; Furcincrva Rond. 1846 in part; Mimosciara Rond. 1846; Yposafora Rond. 1856; Molohrcea Rond. i860. Europe, North and South America, Australia.