4l8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



punctate, scutel more coarsely so than the rest of the thorax, and 

 more hairy ; wings clear, veins distinct and brown, areolet present, 

 radial area open, cubitus not quite reaching the first transverse 

 vein • legs very dark reddish brown, almost black, except at the 

 joint's claws simple; abdomen polished, shining black, except 

 where' covered with white hairs, the dorsal and ventral portions 

 of the second, third and fourth abdominal segments bare. 



The type of this species was probably found in Waterbury, 

 and is represented by a specimen collected 13 April, 1890, ovi- 

 positing in the buds of Quercus hicolor. 

 *A. operatola Riley and Bassett. 

 Female: length 3.5 mm.; head, including the antennae, and 

 thorax, including the legs, dark reddish ; head almost crescent- 

 shaped, very finely rugose, antennae 13- jointed, first joint dark, 

 second joint globose and only one-third as long as the first, third 

 not quite as long as the first and second combined, the fourth to 

 the twelfth successively with each one shorter than the next 

 preceding, the apical joint tapering at its apex; thorax punctate, 

 parapsidal grooves as well as the two intermediate lines present, 

 the latter extending little more than half-way to the scutel and 

 posteriorly somewhat divergent, mesonotal lines near the 

 insertion of the wings distinct, except for minute hairs which 

 somewhat obscure the same, as well as the punctuation of the 

 thorax, scutel roundish, somewhat rugose and more hairy than 

 the rest of the thorax, its foveae oval, shining, oblique and 

 separated from each other by a carina; wings hyaline, with the 

 subcostal and two transverse veins brownish red, the other veins 

 nearly colorless, radial area present, areolet wanting; legs paler 

 red than the thorax ; abdomen black and polished, the sides of the 

 first segment sparingly covered anteriorly with white hairs. 



The galls vary in size from that of the flaxseed to 8 mm. in 

 length, are shaped somewhat like the false chestnuts that are 

 often seen in chestnut burrs, and rarely approach the shape of 

 an acorn. From one to six of these galls have been found origi- 

 nating from between the acorn and the acorn cup of Quercus 

 ilicifolia. The acorn is in most cases aborted through the pres- 

 ence of these galls, and the galls when mature fall to the ground. 

 This is regarded as the agamous form of A. operator. 

 The type locality of this species is Waterbury. 



