No. 22.] HYMENOPTERA OF CONNECTICUT. 419 



*A. palustris Osten Sacken. Succulent Oak Gall. 



Female and male : length 2 to 2.5 mm. ; mostly black ; mouth 

 brownish yellow, palpi brownish; antennae filiform, 15-jointed, 

 four to six basal joints yellow, the rest brown (in the male the 

 basal joints also somewhat infuscated), third joint longer than 

 the others, the fourth to eighth joints successively shorter than 

 the joint next preceding (this difference in length not so marked 

 in the male as in the female), the following joints equal in length ; 

 thorax smooth and shining, scutel deeply sculptured on its 

 posterior aspect ; legs yellow except the bases of coxae which 

 are brown, and the tips of the tarsi which are black ; wings im- 

 maculate, with the thickened veins brown, those of the anterior 

 portion of the wing especially dark, the basal vein sometimes 

 obsoletely clouded, areolet distinct, cubitus distinct throughout 

 its whole length and not quite reaching the margin ; abdomen 

 shining. 



The galls of this species range from 9 to 10 mm. in diameter, 

 are globular, hollow, green, succulent, contain a whitish free 

 globular body about 2.5 mm. in diameter, and occur on the buds 

 and young leaves of Quercus palustris, the pin oak. 



The type locality of this species is Waterbury. New Haven, 

 5 June, 1906 (B. H. W.). 



A. flocci Walsh. 



Female : length 2-2.5 mm - > mostly black ; vertex glabrous and 

 a little polished, face brownish and apparently pubescent, palpi 

 brown, antennae apparently two-thirds as long as the body, 13- 

 jointed, the basal half rufous, the terminal half dark brown ; the 

 apical joint more than half as long again as the penultimate; 

 thorax glabrous, somewhat polished, with two longitudinal striae 

 converging toward the scutel and sometimes with a faint medial 

 stria in addition, striae obsolete anteriorly, pleurae sometimes 

 entirely opaque, subpubescent, sometimes wfth a moderately 

 polished spot under the wings, scutel finely rugose, not polished, 

 with basal shallow foveae ; legs uniformly honey-yellow, verging 

 toward rufous, except the tarsal tips, which are obfuscated; 

 wings hyaline, the principal veins and the cross veins brown, 

 areolet distinct, radial area open and three to three and a half 

 times as long as wide; abdomen polished, as seen from the side 



