914 CHARLES PauL ALEXANDER 
very different from those of Ula and closer to those of the subgenus 
Lasiomastix in the genus Limnophila. 
Ulomorpha pilosella (O. 8.) 
1859 Limnophila pilosella O.S. Proc. Acad. Nat. Sci. Phila., p. 241. 
1869 Ulomorpha pilosella O. 8. Mon. Dipt. N. Amer., part 4, p. 233. 
Ulomorpha pilosella is a shiny, reddish brown fly, with the wings faintly 
darkened. The sessile or subsessile cell Re is a well-marked feature of 
the venation (Plate XLI, 163). The insect is common in cold Canadian 
woods thruout northeastern North America. 
Genus Adelphomyia Bergroth 
1891 Adelphomyia Bergr. Mittheil. Naturf. Ges. Bern, 1890, p. 134. 
The species of the genus Adelphomyia are among the smallest of the 
Limnophilini. The immature stages of the American species are spent 
in rich, saturated, organic earth in shady situations. There are two 
European and three American species thus far described. Adelphomyia 
cayuga and A. americana are commonest in late summer; A. minuta is a 
species of late spring and early summer, fairly common in rich Canadian 
woods, in gorges, and near wooded bogs. 
A recent study of the larval head in this genus shows a decided rela- 
tionship with the tribe Pediciini, and it seems probable that the genus will 
have to be placed in that tribe despite the very limnophiline appearance 
of the adults. 
The local species of Adelphomyia may be separated by the following key: 
1. Cell M, of wings lacking; coloration of body dark brown; antennae with less than 16 seg- 
ments, the basal segments of the flagellum fused together. [Pomona Journ., vol. 4, 
Drools Be LO 24 Fey Cela te Nels o1 G28) ae ie one Oe ee A. cayuga Alex. 
Cell Mi of wings present; coloration of body yellow or. light yellowish brown; antennae 
with).the basal flagellar'segments distinct. 2.25.54... 2 es oe eee eee ae 2 
2. Pubescence in cells of wings sparse; cross-vein r not evident; cross-vein m short or 
obliterated by fusion of M; on M@i+2;.color of body light yellow. [Can. Ent., vol. 43, 
D-.29/—288~ 9 LOIN (Blate Dc sGil)ie ei iene ene A. minuta Alex. 
Pubescence in cells of wings conspicuous; cross-veins r and m usually distinct, the former 
in some cases little evident; color of body yellowish brown. {Pomona Journ., vol. 4, 
p. 829-830, fig. a. 1912. Ent. News, vol. 22, p. 353-354, fig. 4, as A. senilis Hal. 
of, Muropert 1 Oia] (late xeluileaGO 9) Rey acs seesaw eee A. americana Alex. 
Genus Epiphragma Osten Sacken — 
1859 Epiphragma O.S. Proc. Acad. Nat. Sci. Phila., p. 238. 
