REPORT OF THE STATE ENTOMOLOGIST IQI2 143 
Key to species 
a Antennal segments 8 
b Fourth palpal segment more than twice the length of the third; 
harpes broadly rounded apically...... johnsoni Felt, C. 802 
bb Fourth palpal segment nearly twice the length of the third; 
harpes subaemte apically... ....4.4.:.<- Go cikeenmel lie Pelt Grose 
aa Antennal segments 9 
b Wings small, narrow, subcosta uniting with the margin before 
the basal half; palpi quadriarticulate....... corn Helt. © 456 
bb Wings rather large, broad, subcosta uniting with the margin at 
or beyond the basal half 
c Scutellum dark brown, the legs a variable fuscous; palpi tri- 
AMENCHMENES GUOWUER A Roe oe ane aee obe diervillae Felt, C. 490 
cc Scutellum dark reddish brown, the legs a variable yellowish brown; 
palpi quadriarticulate, slender........... Sip AMOS aetle Sp GanlZo5 
aaa Antennal segments 10 
b Lerigth 1.5 mm, body dark brown; female....perplexa Felt 
bb Length 1.25 mm, body dark brown; male....borealis n. sp, 
Ey ey 
aaaa Antennal segments II Car 
b Scutellum yellowish brown; abdomen fuscous brown 
(eG 2eel ae, Gi, Bok, (Cy we 
Microcerata johnsoni Felt 
iGueeneltebe . N: Y. State Mus. Bul. 124, ps 310 
This form was taken August 2, 1891 by Prof. C. W. Johnson 
at Philadelphia, Pa. 
Male. Length 1.75 mm. Antennae sparsely haired, pale yel- 
lowish; 8 segments, the fourth and following segments each some- 
what more produced than the preceding, the sixth to the eighth 
with few or no subapical appendages. Palpi; the first segment, 
short, stout, subrectangular; the second a little longer, stouter, the 
third one-half longer than the second, more slender and the fourth 
more than twice the length of the third. Mesonotum dark brown, 
almost black. Scutellum, postscutellum and abdomen dark brown. 
Wings hyaline, costa reddish brown. MHalteres yellowish basally, 
slightly fuscous apically. Legs a nearly uniform fuscous yellowish, 
tarsi slightly darker. Metatarsus more than two and _ one-half 
times as long as the following segment, the distal tarsal segment 
with a sparse subapical row of long, stout setae; claws rather long, 
stout, slightly curved, with a rather conspicuous tooth dorsally at 
the basal third and the concavity with several long, slender denticu- 
lations; pulvilli longer than the claws, thickly setose. Genitalia; 
basal clasp segment long, slender, terminal clasp segment swollen 
at the base, with several short, stout apical and subapical spines; 
dorsal plate broad, short, broadly and slightly emarginate; ventral 
plate apparently wanting. Harpes well separated, tapering, broadly 
rounded; style long, stout, tapering, broadly rounded. Type Cecid. 
802. 
