REPORT OF THE STATK ENTOMOLOGIST Kjlf) [93 



The midges were reared the last of April and in May [907 from 

 an oval stem gall on an unknown weed taken at Albany, N. Y. 

 The larvae winter in the gall. 



Gall. An oval, polythalamous stem enlargement some 2 cm in 

 length and .5 cm in diameter. The gall closely resembles that of 

 Lasioptera desmodii Felt. The larvae tunnel the cork- 

 like tissues. 



Larva. Length 2.5 mm, rather stout, pale orange; head small; 

 antennae uniarticulate, tapering; breastbone expanded apically, 

 bidentate and with a smah median tooth, subobsolete basally; skin 

 nearly smooth; posterior extremity broadly rounded. 



Male. Length 3 mm. Antennae dark brown; 18 segments, the 

 fifth with a length slightly greater than its diameter; terminal seg- 

 ment short, broadly oval. Palpi; the first segment subquadrate, 

 expanding distally, the second stout, broadly oval, the third a little 

 longer, more slender, the fourth more than twice the length of 

 the preceding, slender, tapering; face fuscous with a few whitish 

 scales. Head posteriorly rather thickly clothed with pale yellowish 

 scales. Mesonotum dark brown, sparsely margined laterally and 

 anteriorly with yellowish hairs, submedian lines rather thickly clothed 

 with the same. Scutellum dark brown with a few whitish scales, 

 postscutellum dark brown. Abdomen dark brown or black with 

 submedian rows of conspicuous lunate, silvery spots, a pair on the* 

 posterior margin of each segment; genitalia fuscous yellowish, venter 

 suffused with silvery scales. Wings hyaline, costa dark brown, the 

 third vein uniting with the margin at the distal third. Halteres a 

 pale yellowish. Legs a variable brown, the tarsi dark brown; claws 

 long, stout, strongly curved, the pul villi longer than the claws. 

 Genitalia; basal clasp segment long, rather slender; terminal clasp 

 segment somewhat swollen at the base; dorsal plate broad, broadly 

 and triangularly incised; ventral plate long, narrow, narrowly 

 rounded. Harpes long, narrow, tapering. 



Female. Length 2.75 mm. Antennae dark brown; 20-22 seg- 

 ments, the fifth with a length about equal to its diameter; terminal 

 segment slightly prolonged, broadly rounded distally. Palpi; the 

 first segment short, stout, greatly swollen distally, the second stouter, 

 subrectangular, the third a little longer, more slender, the fourth 

 fully one-half longer than the third, more slender; face with patches 

 of silvery white scales, mouth -parts fuscous yellowish. Mesonotum 

 dark brown, variably marked laterally and anteriorly with yellowish 

 or whitish scales, the submedian lines thickly clothed with yellowish 

 setae. Scutellum reddish brown with a few yellowish setae apically; 

 ovipositor pale yellowish; venter suffused with silvery scales. Wings 

 hyaline, costa dark brown, discal spot yellowish, the yellowish 

 brown third vein joining the costa near the basal half. Halteres a 

 pale yellowish. Legs a variable brown, the tarsi dark brown, the 

 pul villi about as long as the claws. Ovipositor about as long a3 

 the abdomen, with oval patches of stout, spear-shaped spines; term- 

 inal lobe long, slender, narrowly rounded, with a group of heavy, 

 recurved hooks. Type Cecid. ai458. 



