72 H. F. BASSETT. 



the sterile flowers of Q. prinoides, and that I failed to find the galls 

 simply because I did not revisit the trees until the flowers had fallen 

 off. Of course this cannot be ascertained till next spring, and pos- 

 sibly not then, but meantime I name and describe this very pretty 

 little species, of which I have sixteen individuals. 



Gall-flies. — Head black, and with extremely fine reticulations; antennse with 

 fourteen joints, first heavy, club shaped : second thicker than the first and al- 

 most equal in length, third two-thirds as long as the first two and extremely 

 slender, fourth short and slender; all these light yellowish brown, fifth yellow- 

 ish to dark brown at the tip, a little thicker than the fourth, remaining joints 

 very dark brown, very shoit and thick, the thirteenth and fourteenth separated 

 by an indistinct articulation, and the thirteenth not so dark brown as the pre- 

 ceding. Thorax narrow, smooth and shining, parallel lines present, parapsidal 

 grooves narrow, not shining; all these are quite slender; general surface of the 

 mesonotum finely, evenly and very beautifully transversely wrinkled ; scutelluni 

 rather large, more finely wrinkled than the mesonotum and less shining, fovese 

 wanting. Abdomen black, polished, subdepressed, second segment rather long, 

 third one-half as long as the second, others concealed in the dry specimens- 

 Legs.- femur and tibia dark brown, except the joints, which, with the coxfe and 

 tarsi, are yellowish brown, ungues simple. Wings hyaline, veins pale yellow, 

 almost colorless ; areolet absent, and the cubitus so indistinct as to be traced with 

 difficulty even half way to the first transverse; radial area large, open; second 

 transverse does not reach quite to the anterior edge of the wing and posteriorly 

 extends no further than the point where the areolet is found in most species. 

 Length : body, .10 inch. ; wings .10 inch. ; antennae. .08 inch. 

 6. D. peduiiciilata u. sp. 



Galls growing on slender peduncles on the edge of the leaves of 

 Q. rubra and Q. coccinea. The peduncles are from one-fourth to 

 one-half an inch in length and are plainly the prolongation of lateral 

 leaf veins. They are usually flattened, and in some cases bordered 

 on one side for nearly the whole length with a very narrow e.xtension 

 of the leaf blade itself. When dry they are often twisted like the 

 stems of the moss Funaria hygrometi'ica. The gall is ovate, with a 

 long, curved point. It measures one-eighth by three-sixteenths of 

 an inch exclusive of the tip. When fresh it is smooth, and has a 

 somewhat glaucus hue, which mostly disappears in drying, changing 

 to a dark, dirty olive-brown. It is extremely thin, and is hollow, 

 except the free, smooth, oval larval cell. This cell is .05 by .10 of 

 an inch, and is extremely fragile. 



This gall differs from Andrlcus capsnla Bass, in size, being much 

 larger, and in shape the latter being as long, but only half as thick, 

 and also in color, which in either species is constant. But the free 

 larval cell in D. pedunculata, and its entire absence in .1. capsnla is 

 the most striking: difference. 



