No. 22.] HYMENOPTERA OF CONNECTICUT. 409 



a very favorable light. The difficulty with which the veins can 

 be seen may be due to the fact that the specimens upon which 

 this description is based may have been immature. 



The galls of this species were found attached to the under side 

 of the leaves of Quercus rubra. These galls are globular, vary- 

 ing in size from 6 to i8 mm. in diameter. They are in color like a 

 white grape, sour to the taste, succulent, of the consistency of a 

 green grape, and sufficiently translucent to enable one to make out 

 the single cell in the centre by simply holding the gall up to the 

 sunlight. 



Type locality: Waterbury. 



Andricus Hartig. 



*A. ventricosus Bassett. 



Female: length 3.5 mm.; head and thorax bright cinnamon 

 color, the former finely punctate, face pubescent, dark brown 

 around the mouth, tips of the mandibles black, palpi pale brown, 

 antennse 15-jointed, third joint longest, the other joints gradually 

 decreasing in length to the apical one, which is as long as the two 

 preceding combined and provided with a connate suture; thorax 

 punctate somewhat like the head, parapsidal grooves present, the 

 line dividing the mesonotum lengthwise reaching from the pro- 

 notum to the scutel, on each side of this medial line a line reach- 

 ing half-way from the collar or pronotum to the scutel, also a 

 deep linear depression on each side over the base of the wings : 

 legs mostly yellow, tips of the tarsi black ; wings hyaline, the sub- 

 costal, anal, first and second transverse veins dark reddish brown, 

 the first two rather paler toward the base, areolet distinct, radial 

 area open, the vein forming its base considerably enlarged ; abdo- 

 men darker brown than the thorax. 



The galls of this species grow in clusters of from three or 

 four to a dozen on the limbs and occasionally on the trunks of 

 young shrubs of Quercus ilicifolia. They are cone-shaped, trun- 

 cate at the base, with the apex often prolonged into a slender 

 recurved point, from 12 to 15 mm. long and from 6 to 9 mm. in 

 diameter at the base. When quite fresh or immature they are 

 often of a deep red color, which turns to brown or black when 

 the galls become dry. Finally, the galls are very hard and enclose 

 a nearly free larval cell. 



Type locality : Waterbury. 



