198 



NEW YORK STATE MUSEUM 



the middle of May. Eurytoma and Polygnotus species were reared 

 from this gall. 



Gall. The more usual form of gall is fusiform, about 1 cm long and 

 about .4 cm in diameter. It occurs rather commonly on the smaller 

 branches of several species of aster. The galls are monothalamous 

 with a narrow central cavity extending the 

 greater portion of their length. They are usu- 

 ally single though occasionally two may be 

 confluent, or there may be two on the same 

 branch, an inch or more apart. 



Larva. Length 4 mm, rather stout, yel- 

 lowish. Head small; antennae uniarticulate, 

 slender, breastbone stout, slightly expanded 

 apically, bidentate; skin nearly smooth; pos- 

 terior extremity broadly rounded. 



Male. Length 2.75 mm. Antennae, dark 

 brown, basally yellowish, ventrally with silvery 

 scales; 19 segments, the fifth with a length 

 slightly greater than its diameter; terminal 

 segment slightly prolonged, narrowly oval. 

 Palpi fuscous, the first segment very short, 

 broad, the second twice its length, broadly 

 oval, the third a little longer than the second, 

 much more slender, the fourth twice the length 

 of the third and more slender. Face with a 

 patch of silvery scales. Mesonotum dark brown, rather broadly and 

 irregularly margined laterally and anteriorly with silvery white scales, 

 a cluster of yellowish scales at the base of the wings, submedian lines 

 sparsely clothed with short, yellowish scales. Scutellum dark brown, 

 with sparse silvery scales and with a few yellowish setae apically, 

 post scutellum dark brown. Abdomen dark brown with submedian 

 rows of small, silvery spots on segments one to seven, incisures deep 

 red; venter black with a broad median white stripe; genitalia fus- 

 cous. Wings hyaline, costa dark brown, the third vein uniting with 

 the margin at the basal half. Halteres mostly pale yellowish. Legs 

 mostly dark brown, the extremities of femora and tibiae narrowly 

 annulate with yellowish white, the tarsal segments narrowly annulate 

 basally with yellowish white, except the three distal ones on the 

 posterior legs, which are broadly annulate basally, the second, third 

 and fourth also narrowly annulate distally; claws long, slender, 

 strongly curved, a little longer than the pulvilli. Genitalia; basal 

 clasp segment long, slender, terminal clasp segment, swollen basally; 

 dorsal plate broad, broadly and triangularly emarginate; ventral 

 plate short, broad, angularly rounded. Harpes short, stout, obtuse. 

 Female. Length 2.75 mm. Antennae dark brown; basally 

 fuscous yellowish; 21 segments, the first broadly obconic, the second 

 slightly flattened, subglobose, the third and fourth closely fused, 

 the fifth with a length scarcely equal its diameter; terminal seg- 

 ment somewhat produced, broadly oval. Abdomen; seventh 



Fig. 36 Neolasiop- 

 tera ramus- 

 c u 1 a , two galls 0:1 

 smaller twigs, nat- 

 ural size (original) 





