144 



NEW YORK STATE MUSEUM 



greater than the diameter; terminal segment obovate. Palpi 

 yellowish, the first segment irregularly subquadrate, the second some- 

 what produced, narrowly oval, the third a little longer, more slender, 

 the fourth one-half longer than the third, more slender. Face 

 rather thickly clothed with silvery white scales. Mesonotum dark 

 brown, rather thickly and evenly clothed with yellowish white 

 scales. Scutellum reddish brown with a few coarse setae apically, 

 postscutellum darker. Abdomen a rich dark brown, the first seg- 

 ment rather broadly banded posteriorly with silvery white, the others 

 with submedian rows of small, lunate, silvery white spots and 

 sublateral rows of rather prolonged, silvery white spots, particularly 



on the second, third and fourth seg- 

 ments, venter suffused with silvery 

 white, genitalia fuscous. Wings 

 hyaline, costa dark brown, the yel- 

 lowish white discal spot near the 

 basal third, the third vein uniting 

 thereat; halteres a nearly uniform 

 yellowish orange. Legs mostly dark 

 brown, the basal half of femora, 

 the femoro-tibio articulation, the 

 extremity of the tibiae and narrow 

 basal annulations on the tarsal seg- 

 ments yellowish white, the latter 

 broad on the posterior legs; claws 

 long, strongly curved, the pulvilli a 

 little shorter than the claws. Geni- 

 talia; basal clasp segment long; 

 terminal clasp segment swollen at 

 the base; dorsal plate short, broad, 

 deeply and narrowly incised; ven- 

 tral "plate long, stout, broadly 

 rounded. Harpes long, broad at 

 base, strongly constricted at the 

 distal third. 



Female. Length 2.5 mm. Anten- 

 nae dark brown; basal segments fuscous yellowish; 20 segments, the 

 fifth with a length a little greater than the diameter; terminal seg- 

 ment obovate. Palpi yellowish, the first segment irregularly sub- 

 quadrate, the second stout, broadly oval, the third more slender, a 

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

 Face thickly clothed with silvery scales; eyes narrowly margined 

 posteriorly with silvery scales. Mesonotum dark brown, sparsely 

 margined" laterally and anteriorly with rather long, yellowish hairs, 

 the submedian lines rather thickly ornamented posteriorly with yel- 

 lowish hairs. Scutellum reddish yellow with a few coarse setae api- 

 cally; postscutellum fuscous yellowish. Abdomen dark brown, seg- 

 ments one to seven with submedian rows of small, lunate silveiy 

 white spots and with rudimentary sublateral longitudinal spots on 

 the second, third, fourth and fifth segments; the sixth and seventh 



Fig. 19 Lasioptera con 

 volvuli, gall, enlarged (origi 

 nal) 



