XXVI MONTHLY PROCEEDINGS 



tarsi less densely hii-sute, black and with the tibial spines less strongly developed 

 than in J ; abdomen elongate-ovate, smooth and shining, second segment occupy- 

 ing half the surface, other segments gradually decreasing in size; otherwise 

 as in 9 • 



Described from nearly two hundred bred specimens. The fleshy galls, 

 when dry, are almost unrecognizable from the shrinkage in drying. 



The Grape-producing Cynips. 



This is a very remarkable Cynips producing galls on the under surface 

 of the leaves of Quercus laurifolia, which very much resemble small 

 white grapes. They make their appearance early in April, but the flies 

 do not escape until the middle of May. 

 Cynips q. raceinaria n. sp. 



Galls. — Spherical, crisp, sour and succulent, attached to the under 

 surface of the leaves, in size and color resembling a small white grape 

 and in consistency not unlike a green gooseberry, with a single reddish 

 kernel in the centre. Diameter .35 to .40 inch 



Gall-Fly. — 9- — Length .16 to .17 inch. Black; head rather small, deeply 

 rugoso-punctate, vertex free from pubescence, a tuft of long pubescence back of 

 eyes, face very slightly pubescent; antennte 14-jointed, black and short, only 

 reaching to tip of scutellum, third joint longest, fourth to eighth subequal, the 

 others equal, terminal slightly longer than penultimate; thorax deeply coarsely 

 and irregularly punctate, almost free from pubescence, requiring a high power to 

 detect any ; pleurse less deeply and coarsely punctate ; abdomen large, black and 

 shining, apical half of second segment, and all the other segments excepting at 

 base, finely and densely punctate, a few hairs on second segment, ventral sheath 

 very long; legs reddish-brown, pubescent, coxse and trochanters black, apical 

 spurs on all legs; wings smoky or brownish-black, apices slightly paler, veins 

 black, areolet closed, radial area open, rather narrow. 



Described from numerous bred specimens which hatched in May. 

 No males. 



The only other grape-like gall known to me is Cynips q. sculptus 

 Bassett, described in Proc. Entom. Soc. Phila. 1863, p. 324. The 

 present species is at once distinguished from it by its smaller size, short 

 14-jointed antenna3, the difiierence in shape of joints, color of legs and 

 by the punctation of abdomen. 



Cynips q. sculptus is 9 .20 inch, antennte 13-jointed very long, legs 

 honey yellow, abdomen entire surface microscopically punctate. It was 

 found by Mr. Bassett on Quercus rubra. 



The Spine-bearing Potato Gall. 



Another potato gall, varying greatly in size, found on the terminal 



twigs of Quercus laurifolia. It very much resembles the live oak 



potato gall, Cynips q. batatoides nob. ; but is easily distinguished from 



it and all others by the spiny, succulent tubes which issue from the 



