l66 NEW YORK STATE MUSEUM 



the tarsal segments very narrowly banded with white apically; 

 claws stout, the pulvilli as long as the claws. Ovipositor about 

 one-half the length of the abdomen; terminal lobes short, broadly 

 oval. Type Cecid. aigoi. 



Lasioptera fraxinifolia Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 327 



The midge was reared in August 1907 from a jar containing ash 

 leaves bearing a purplish green subglobular gall, the deformity Osten 

 Sacken characterized under the name of Cecidomyia pellex. 

 It is possible that this fly caused the deformity. 



The gall is green or purplish green, subglobular, monothalamous, 

 and about 5 mm in diameter. It occurs on the lateral veins, mostly 

 on the upper surface of the leaf, its position being indicated on the 

 lower surface by a slight swelling. This gall was observed at West- 

 field, Lake Onondaga, Poughkeepsie, Highland and New York City. 



Larva. Length 2 mm, rather stout, pale yellowish. Head small, 

 antennae short, stout; breastbone obsolete posteriorly, roundly 

 bidentate and slightly expanded apically; skin coarsely shagreened; 

 posterior extremity broadly rounded. 



This is hardly a Lasioptera larva. The gall belonging therewith 

 is probably not the work of Lasioptera. 



Male. Length 1.5 mm. Antennae dark brown; 25 segments, 

 the fifth with a length about three-fourths its diameter; terminal 

 segment produced, tapering distally to a subacute apex. Palpi; 

 the first segment short, stout, irregularly subquadrate, the second 

 narrowly oval, with a length nearly three times its diameter, the 

 third a little longer and more slender, the fourth one-half longer 

 than the third, strongly compressed. Mesonotum dark brown, 

 the submedian lines sparsely haired. Scutellum dark reddish 

 brown, post scutellum apparently dark brown. Abdomen apparently 

 a nearly uniform dark brown. Wings hyaline, costa dark brown, 

 the third vein joining the rather long, whitish discal spot near the 

 basal half; halteres pale yellowish. Coxae yellowish; femora 

 yellowish at the extremities, dark brown near the middle; tibiae 

 dark brown, irregularly yellowish distally; tarsi dark brown; claws 

 long, rather slender, strongly curved, the pulvilli nearly as long 

 as the claws. Genitalia; basal clasp segment long, stout; terminal 

 clasp segment long, swollen; dorsal plate long, broad, deeply and 

 triangularly incised; ventral plate long, slender, tapering. Harpes 

 long, slender, tapering; style long, slender, subacute distally. Type 

 Cecid. ai546a. 



Lasioptera abhamata Felt 



1907 Felt, E. P. N. Y. State Mus. Bui. no, p. 108; separate, p. 11-12 



1908 ■ N. Y. State Mus. Bui. 124, p. 327 



This species was taken June 4, 1907 in general collecting at 

 Karner, N. Y. 



