1864.] 685 



QuERCUS ILICIFOLIA. Club-shaped, wood// galls, growing on the 

 ends of the small limbs. Apex blunt and generally turned to one side, 

 covered in summer loith a few leaves and containing one, and occasion- 

 ally two or three larvse. It is strikingly like that of G. q. tuber of 

 Fitch, but produces a fiy which though closely related^ is evidently a 

 different species. 



C. q. similis n. sp. 



9 . Head and thorax a bright brownish red ; vertex of the head finely sculp- 

 tured ; the rather prominent ocelli are black only at the apex, face pubescent; 

 hairs short, converging towards the mouth. Antennoe. 13-jointed, the 13th nearly 

 as long as the two preceding ones and in some individuals there is an obscurely 

 marked connate suture. Thorax coarsely punctate, sparsely hairy, a shade 

 darker than the head, three faint longitudinal lines reach from the collare to 

 the scutellum. and two other lines, one on each side and very close to the me- 

 dian line, start from the collare and extend half-way to the scutellum ; obscure 

 line over the base of the wing«. Scutellum sculptured, basal pits small, deep 

 and smooth. The central portion of the pleura — in many species smooth and 

 polished — is in this covered with very fine longitudinal strise. The legs of a 

 uniform brownish red, except the tips of the tarsi which are black. Wings, a 

 subopaque white, the subcostal, anal, 1st and 2nd transverse very pale yellow, 

 others colorless and the vein lohich bounds the posterior side of the radial area in 

 other species is, in this obsolete, as is, also, the cubitus and areolet. Abdomen, red, 

 except the dorsal portion of the middle segments which is nearly black : ter- 

 minal segments withdrawn into the others in dry specimens, and the sheath of 

 the ovipositor turned abruptly upward but does not extend above the back of 

 the abdomen as in the Inquilinse. Length .12. 



%. Black head and thorax. Antennoe 15-jointed, 1st and 2nd joints nearly 

 black, others red. Legs, posterior pairs dark reddish-brown, the posterior pair 

 (lark brown, nearly black — all lighter at the joints. Abdomen black and shin- 

 ing, 2nd segment long. It is much smaller than the female. Length .08. 



16 9 ^ -A 'S specimens. 



C. q. tuber Fitch. (N. Y. Rep. Vol. 2nd, No. 309.) 



9 . — Head black, sides, however, in a strong light have a tinge of red ; face 

 black, pubescent, hairs converging towards the mouth Antennoe yellowish- 

 brown, 13-jointed. Thorax, a reddish tinge on the shoulder of the collar; other 

 parts black, rather densely pubescent. Three loi.gitudinal lines somewhat ob- 

 scured by the pubescence; two short lines extend halfway from the collare to 

 the scutellum and there is a short faint line over the base of the wings ; scutel- 

 lum rough, hairy; fovse medium size; smooth spot on the pleura polished, shin- 

 ing, but not perfectly smooth. Legs brown, tips of the tarsi black. Abdomen 



seems probable the June flies oviposit in the galls from which they were pro- 

 duced.— Jan. 28, 1865. 



