400 NEW YORK STATE MUSEUM 
mMycopiprosis Rubs. 
This genus comprises a large number of small, yellowish or light 
brown forms presenting very much the same general appearance 
and yet differing considerably in structural characters. The anterior 
claws are unidentate and the third vein as a rule joins the margin 
of the wing beyond the apex. We have referred to this group a 
considerable number of forms having a more or less uniform 
structure and not referable to such recently erected genera as Kar- 
shomyia, Lobodiplosis, Youngomyia and Coquillettomyia, all of 
which are separated from this large genus by well marked structural 
characters. 
Key to species 
a Third vein uniting with costa well before the apex 
b Harpes indistinct, not lobelike 
c Abdomen pale yellowish; ventral plate rather long, broadly emargi- 
nate, the basal portion of the stem of the 5th antennal segment 
with a length % greater than its diameter..reducta n. sp., C. 479 
bb Harpes lobulate, distinct 
c Harpes setose 
d Abdomen reddish brown; ventral plate short, truncate, the basal 
portion of the stem of the 5th antennal segment with a length 
twices its diametens owe waar eee minuta Felt, C. 290 
cc Harpes strongly spined, the basal portion of the stem of the 5th 
antennal segment with a length % greater than its diameter 
d Abdomen yellowish transparent; scutellum reddish brown........ 
AcCericOlia welt C. x7 
dd Abdomen dark reddish brown; scutellum a pale fuscous yellowish 
pini Felt, C. 348 
aa Third vein uniting with costa beyond the apex 
b Ventral plate long, at least 24 the length of the style 
c Ventral plate expanded apically, broadly and deeply emarginate 
d Dorsal plate long 
e Lobes greatly expanded distaily, spatulate; abdomen yellowish, 
lenin o/5 nil, . 6 (CCCIGOnmiyla) Baewilaiwca Inehc (C. sea 
(Sim, Co wrticae Mele 123) 
ee Uabes long, not greatly expanded laterally, narrowly rounded 
apically 
f Abdomen yellowish brown, reddish brown basally, length .75 
mm, the fifth antennal segment having the stems 2 and 2% 
times their diameters; bred from folded, thickened cherry 
KEES. 60 (CeGidoOimyia) Ccéerasgsitolia Wek, C. angi 
ff Abdomen light yellowish, reddish basally, length 1 mm; 5th 
antennal segment having the stems 2% and 4 times their 
diameters; bred from globular leaf gall on poplar.......... 
DO Mii w Olea, mw, Sox, (C, aug 
