H. F. BASSETT. 323 



Ampliibolips badius n. sp. 



Amoug the gall-flies that I captured at large is a female which 

 I took foom the terminal bud of the tallest shoot of a thrifty 

 clump of white oak sprouts. It was almost beyond my reach and I 

 failed to discover whether it was actually ovipositing or not, but it 

 is safe to assume that it was, either had, or was about to do so. The 

 capture was made in early Spring, before the buds had made any 

 appreciable advance. It belongs to the genus Ampliibolips, and 

 quite distinct from the many other species of this genus in my 

 collection. 



Gall-fly. — Head, antennae, thorax and legs dark brownish red. Head and 

 thorax covered with short, appressed red hairs. Antennae short, only half as 

 long as the body, thirteen jointed, first joint short, second very short and globu- 

 lar, third one-third longer than the two preceding taken together, fourth one- 

 third shorter than the third, fifth and sixth gradually shorter; joints 3, 4, 5 and 

 6 larger at the apex than at the base. Face covered with appressed hairs, and 

 there is an obscure, converging line from the base of each antenna to the mouth. 

 Head rather small, not broader thau the thorax. Prothorax anteriorly a very 

 narrow shining band. Mesothorax full and rounded in front, finely and evenly 

 but rather sparsely punctate. Parapsides — and other lines very indistinct, mainly 

 because of the short, dense and closely appressed hairs. These obscure com- 

 pletely the parapsides posteriorly. Scutellum small, rounded and slightly eleva- 

 ted posteriorly, and the hairiness coarser and more dense than on the mesothorax. 

 Fovae small, almost obsolete. Legs darker than the thorax, densely covered with 

 short, fine and closely appressed hairs. Wings shining, dark smoky brown ; 

 veins dark, almost black. Areolet small but well defined. Cubitus disappears a 

 short distance from the first transverse vein. Abdomen large, black and shin- 

 ing, the second segment dorsally very long, nearly concealing all the others, but 

 retreating ventrally to less than one-half the dorsal length. The sides of this 

 segment are covered with a dense patch of shining reddish hairs. Body .25, an- 

 tennae .13, wings .22. 



Acraspis Gillettei n. sp. 



Galls three-tenths of an inch in diameter. Perfectly round, 

 slightly uneven or pimply, each pimple crowned with a tuft of hair- 

 like pubescence. They are of a pale ash gray color, but brown or 

 black if long exposed to the weather. The larval cell is central 

 and is kept in place by a spongy mass that is loosely fibrous on the 

 inner surface of the gall. The cell is oval, .15 by .18. The shell 

 very thin and hard. The galls affect the leaves of Q. alba, and, as 

 a rule, the tops of tall old trees. They are rarely abundant, but 

 occasionally occur in great numbers on an isolated tree or a small 

 grove of oaks. I took this species at first for A. niger Gill., but 

 it differs from that species in several particulars. 



TRANS. AM. ENT. SOC. XXVI. JULY, 1900. 



