Il8 NEW YORK STATE MUSEUM 



1909 Jarvis, T. D. Ent. Soc. Ont., 39th Rep't, p. 44 



1910 Cook, M. T. Mich. Geol. & Biol. Surv. Pub. 1, Biol. ser. 1, p. 31-32 

 1910 Stebbins, F. A. Springf. Mus. Nat. Hist. Bui. 2, p. 44 



The gall produced by this species and its associate, Dasyneura 

 v i t i s Felt, is rather common on grape leaves and tendrils in various 

 parts of New York State and probably in other portions of the 

 country. It occurs on both cultivated and wild grape, being most 

 abundant the latter part of July or in August. The relatively large, 

 reddish galls attract considerable notice. A female was reared 

 July 15, 1907, and, judging from observations, the species may 

 appear from about that time till the latter part of August or even 

 into September. The larvae desert the galls and transform in the 

 earth, the later individuals presumably hibernating in their pupal 

 chambers. Torymus? ebriaO. S. was reared from this gall. 



Gall. The gall is an irregular, frequently lobulated, succulent 

 enlargement of the leaf stalk, portions of the leaf, particularly 

 near the base, or even the tendrils. A serious infestation may 

 result in an irregular, swollen mass two or three inches long, com- 

 posed of a number of subglobular enlargements, each inhabited by a 

 yellowish larva (pi. 3, fig. 1). Dasyneura vitis Felt apparently 

 may be equally concerned in the production of this gall, as we 

 have taken larvae of the last named form from what was supposed 

 to be typical Lasioptera vitis O. S. galls. 



This species is very subject to attack by insect parasites. 



Larva. Length 3 mm, pale orange; head rather broad; antennae 

 short, stout; breastbone bidentate, broad anteriorly, tapering 

 posteriorly; skin coarsely shagreened; terminal segment broadly 

 rounded. This larva is hardly a typical Lasioptera larva. 



Female. Length 1.5 mm. Antennae dark brown, pale yellowish 

 orange basally; 22 segments, the fifth with a length equal to its 

 diameter; terminal segment somewhat produced, conic. Palpi; 

 fuscous yellowish, the first segment subrect angular, with a length 

 about one-half greater than its diameter, the second a little longer, 

 rounded at the extremities, the third a little longer and more slender 

 than the second, the fourth one-half longer and more slender than 

 the third; face fuscous with a conspicuous patch of whitish scales. 

 Mesonotum light brown, variably margined laterally and anteriorly 

 with yellowish white scales, the submedian lines rather thickly 

 clothed with yellowish hairs. Scutellum pale yellowish, postscutellum 

 yellowish. Abdomen dark brown, with the segments broadly 

 margined posteriorly and laterally with golden yellow; ovipositor 

 pale yellowish; venter yellowish transparent. Wings hyaline, costa 

 dark brown, the third vein uniting with the margin near the basal 

 half. Halteres yellowish transparent; legs pale yellowish, the 

 tarsi mostly dark brown; claws long, slender, strongly curved, 

 the pulvilli nearly as long as the claws. Ovipositor about as long 

 as the body, the terminal lobes long, slender and with a patch of 



