92 H. F. BASSETT. 



Male. — The male differs only in the usual sexual variations, viz., the antenna; 

 fourteen jointed, the third joint curved and incised, the smaller abdomen and 

 the smaller size. 



Among the thousands of this species that are in my collection not 

 more than one-tenth are males. 

 2. A. tutnidu»$ n. sp. 



Galls. — Swellings of the main stalks of that variety of Lactuca 

 that is found in old and dry fields. They are commonly near the 

 summit of the stalk, often in the panicle itself, and then covered with 

 the short flower stems. They vary greatly in size from slight, knotty 

 and irregular enlargements of the stalk to large and more or less 

 regularly ovate galls two or three inches long and an inch in diam- 

 eter. The larvae are imbedded in the soft pith that usually nearly 

 or quite fills the galls. They can hardly he said to have larval cells, 

 though a thin transparent coating lines the cavity in which each one 

 lies. They are polythalamous, though far less prolific than the spe- 

 cies just described. 



These galls attracted my attention many years ago, but I not only 

 confounded them with the species last described, but consigned them 

 both so the subfamily Inquilime, because of the closed radial area in 

 the wings of the imagos. 



Gall-flies. — Female. — Head and thorax black; antenupe translucent brown at 

 the base to dusky brown at the end, thirteen jointed, the first joint short and 

 small, the third, fourth, fifth and sixth equal, remainder gradually shorter to the 

 thirteenth, which is long, and shows an indistinct annulatiou ; facial ridge broad 

 and high, vertex finely and sharply reticulated ; the head is more decidedly snb- 

 qiiadrate than that of ony other species known to me in the whole family of the 

 Cynipidje. Thorax, like the vertex, sharply reticulated ; collare very broad ; 

 pleuriB beautifully striate ; parallel lines on the raesothorax short, and so indfs- 

 tinct, as to be seen only in the most favorable light; median line short and nar- 

 row ; parapsidal grooves very narrow, and almost parallel until close to the sen- 

 tellum, where they converge: lines from the scutelhun towards the base of the 

 wings are not heavy, but quite distinct; the short, closely appressed, microscopic 

 hairs on the thorax give to it a silky appearance and obscure somewhat the 

 beautiful reticulation beneath ; scutellum slightly rugose and with somewhat 

 coarser microscopic hairs; fovese large, shallow, not smooth. ^-Ifirfomen shining, 

 semi-translucent brown, second segment of moderate length, and with a small, 

 den.se tuft of hairs far down on the sides of the anterior margin, and easily over- 

 looked ; in some specimens a few hairs are seen over a much larger portion of 

 this segment; third segment a little shorter than the second, and the remaining 

 ones quite narrow. Legs dark reddish brown ; ungues simple. Wings with a 

 faint smoky tinge, veins yellowish brown, not heavy, areolet wanting, cubitus 

 reaching two-thirds of the distance to the first transverse, radial area closed. 

 Length : body, .14 inch.; anteuuie, .10 inch.: wings, .12 inch. 



Male. — Black, except the legs and autenufe ; antennje fourteen joints, third 

 short curved and incised ; all dark brownish red, legs yellowish brown. Length : 

 bodv, .12 inch. ; wings, .12 inch.; antenuie, .11 inch. 



