I38 NEW YORK STATE MUSEUM 



Gall. The gall is an irregular, subfusiform or elongate swelling 

 on the smaller branches of blackberry. It presents a somewhat 

 general resemblance to the deformity produced by the gouty gall 

 beetle (Agrilus ruficollis Fabr.). The gall is hard, 

 woody (usually of the same color as the adjacent bark) about 2 cm 

 long and 1 cm in diameter, polythalamous and contains numerous 

 pale yellowish larvae. 



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

 antennae rather short, stout; breastbone stout, slender, bidentate, 

 with a minute median tooth; skin coarsely shagreened; posterior 

 extremity broadly rounded. 



Male. Length 2 mm. Antennae dark brown, yellowish basally; 

 18-20 segments, the fifth with a length a little less than the diameter; 

 terminal segment greatly produced, narrowly rounded distally. 

 Palpi; the first segment irregularly subquadrate, the second longer, 

 rather broadly rounded, the third a little longer and much more 

 slender than the second, the fourth twice the length of the second, 

 more slender; face with a conspicuous patch of white scales; eyes 

 narrowly margined posteriorly with yellowish scales. Mesonotum 

 dark brown, irregularly margined laterally and anteriorly with 

 yellowish or yellowish white scales; submedian lines rather thickly 

 clothed with short, golden yellow scales. Scutellum dark brown, 

 with a few yellowish setae apically, postscutellum light reddish 

 brown. Abdomen dark brown with the basal segment suffused 

 with silvery white scales, the second to fifth narrowly margined 

 posteriorly with whitish hairs, the sixth and seventh narrowly 

 margined with yellowish hairs, the incisures deep red; genitalia 

 fuscous, venter black with a broad median area suffused with silvery 

 white scales, the seventh and eighth segments sparsely scaled and 

 therefore showing a deep red. Wings hyaline, costa dark brown, 

 the long whitish discal spot at the basal half; the third vein uniting 

 with the margin near the basal half. Halteres pale yellowish basally, 

 whitish transparent apically. Legs mostly a light fuscous yellowish; 

 femora and tibiae irregularly and rather broadly banded near the 

 middle with variable fuscous, the distal tarsal segments slightly 

 darker; claws rather long, slender, strongly curved, the pul villi as 

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

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

 deeply and triangularly incised, the lobes narrowly rounded; ventral 

 plate long, broadly rounded. Harpes long, tapering, obtuse, sub- 

 apically a heavy subquadrate diverging process. 



Female. Length 2 to 3 mm. Antennae dark brown basally, 

 fuscous yellowish; 25 segments, the fifth with a length somewhat 

 produced, obovate. Palpi; the first segment stout, irregularly sub- 

 quadrate, the second about as long, rather broadly rounded, the 

 third one-half longer than the second, much more slender, the 

 fourth nearly twice the length of the preceding, more slender; face 

 pale yellowish, sparsely clothed with light setae; eyes large, black. 

 Mesonotum dark brown or black, broadly margined laterally and 

 anteriorly with silvery white, the submedian lines sparsely clothed 



