66 [OCTOBEII 



Diameter about 0.15. Cynips quercus modesta u. sp. 



The two specimens iu my possession are a little longer than broad, ris- 

 ing abruptly on the upper side of the leaf, more subconical on the oppo- 

 site side. The substance is hard, almost woody. I cut one of my speci- 

 mens open and found that notwithstanding its small size, it contained five 

 hollows, each producing the comparatively lai*ge fly. Three of the flies 

 had already escaped from this gall, the two others, although perfectly 

 formed, were still in their cells; a third specimen I reared from the other 

 gall (end of June). On the whole, this gall has so little peculiar and 

 characteristic about it, that I apprehend it will be somewhat difiicult to 

 identify it, unless by the fly. 



Cynips quercus modesta n. sp. — Head reddish-browu below and behind the eyes, 

 vertex black; antennse yellowish-brown, 12-jointed, third joint elongated, the fol- 

 lowing gradually decreasing in length; the last twice as long as the preceding; 

 thorax black, subopaque. microscopically, but densely punctate, with two moder- 

 ately deep furrows converging towards the scutelhun; abdomen dark brown; feet 

 yellow, middle portion of the femora and tibire brown, especially on the posterior 

 pair; tips of tarsi infuscated; wiugs hyaline, thick veins j)ale brownish; areolet 

 indistinct or none. Length 0.06. 



Three 9 specimens. 



17. Quercus nigra. Black-Jack Oak. Jrreyular^ clo)iijatc<( sircf/iiaj 

 uH the under side of the midrib of the leaf. Cyntps QUERCUS NIGRiE n. sp. 



Found two specimens, in June. One of them extends for about an 

 inch along the vein, the other is shorter; both are greenish, and about 0.2 

 or 0.3 broad. Each gall contained several flies, which escaped between 

 the 20th and 22nd of June, after which the larger gall appeared pierced 

 with nine holes. 



Cynips quercus nigrse n. sp. — 9- Reddish-brown on head and thorax; abdomen 

 dark brown, shining: antennae 14-jointed, brownish-yellow, last joint elongated 

 (viewed in a certain light it appears to have an indication of a i5th joint) ; anter- 

 ior feet brownish-yellow, intermediate ones darker brownish on femora and tibiae; 

 posterior ones still darker brown; all the tarsi brownish-yellow, with infuscated 

 tips; wings hyaline, very transparent, subcostal and radial veins colorless, almost 

 pellucid, areolet none, cubital very indistinct. 



'£ . Black, abdomen shining, antennae yellowish, brown at base ( ?, a portion of 

 them in my only specimen is broken), feet pale yellow, femora brownish in the 

 middle, tibiae of the intermediate and posterior pair brownish; tips of tarsi infus- 

 cated; wings as in the 9 • Length 'J, 0.05, 9^.09. 

 Eight 9 and one % specimens. 



A precisely similar swelling occurs on the red oak and I found several 

 on the 16th of July, but did not obtain the fly. 



18. Quercus prinos. Swamp-chestniit Oak. SirrlllHij (f fhr leaf- 

 stalk, a.t the basis of the leaf or, sometimes, (f the midrib near the basis. 



