No. 22.] HYMENOPTERA OF CONNECTICUT. 433 



Gall hemispherical, pouch-like, the largest not more than 4.5 

 mm. in diameter, attached by its base to the under side of the 

 leaves of Quercus coccinea. 



*A. (C.) pustulatoides Bassett. 



Female : length 2.5 mm. ; head and thorax dark brownish red, 

 almost black; antennae 13-jointed, third joint hardly longer than 

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

 third, fifth to twelfth subequal, thirteenth one-fourth longer than 

 the preceding and with a suggestion of a suture near the tip ; 

 mesothorax reticulated and with some scattered hairs, parapsidal 

 grooves present, in addition on the dorsulum parallel lines extend- 

 ing half-way from the pronotum to the scutel and lines over 

 the base of the wings, scutel pointed, finely roughened and with 

 smooth shallow foveae; anterior and middle legs light yellowish 

 brown, posterior pair much darker, claws simple; wings hyaline, 

 veins mostly colorless, areolet present but indistinct, radial area 

 open ; abdomen shining yellowish brown, lightest anteriorly, the 

 second segment nearly concealing the remaining ones. 



This species gives rise to blister-like galls on the points of 

 the acute lobes of the leaves of Quercus coccinea. Each gall is 

 ovate-acuminate, 8.5 mm. in diameter, sometimes slightly de- 

 pressed above, with thin walls enclosing a free, oblong-oval, thin- 

 walled, larval cell, the length of which is at least twice its diam- 

 eter, of the same color as the leaf and tipped with a long hair- 

 like point. 



The type locality is Waterbury. 

 *A. (C.) futilis Osten Sacken. A. papillatus Osten Sacken. 

 Oak Wart Gall. 



Length 1.5 mm.; mostly black; mouth slightly reddish, palpi, 

 antennae and legs mostly yellow, coxae blackish at base, posterior 

 femora slightly infuscated above; thorax smooth, indistinctly 

 aciculated, scutel somewhat punctate ; wings clear, veins brown- 

 ish yellow, areolet present, cubitus mostly distinct, obsolescent 

 only at its base; antennae 15-jointed, third joint a little longer 

 than the following joints, all of which are nearly equal to one 

 another in length ; abdomen shining, the second segment longest 

 and covering nearly all of the succeeding segments. 



This is said to be one of the most common gall insects in 



Connecticut. Its galls are rounded and project from both sides 

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