332 Annals Entomological Society of America [Vol. IV, 



Stanford collection, which includes eighteen undescribed spe- 

 . forms the basis of the present work, in which it is 

 attempted to bring together in monographic form all the Cali- 

 fornian species. The table for genera and generic definitions 

 have been adapted from Dalla Torre and Kieffer's monographs, 

 from which much of the nomenclatorial data has also been 

 derived. The author is greatly indebted to Professor Kellogg, 

 under whose direction the work was performed, and to Mr. 

 William A. Beutenmuller and Professor C. P. Gillette, who 

 have compared specimens of doubtful identity with types in 

 their possession, for helpful suggestions and advice during the 

 progress of the work. 



Fam. CYNIPIDT?. 



Subfam. cynipix.k. 



Cynipides, Psenides, hiquilinae. T. Hartig; Zeits. f. Ent., vol. 2 (1840), 

 p. 187, L97, 



Cyniphoideae. A. Forster, Verh. Zool. Gcs. Wien, vol. I!) (1869), p. 329, no. 2. 

 Cynipina. C. < '■. Thomson, I tpusc. Ent., vol. 8 1 1 s77 |, p. 778 

 Cynipinae, [nquilinae. Ashmi ad, Tr. Am. Ent. Soc, vol. 13 (1886), p. 60. 

 Cynipina;. Dalla Torre, Cat. Hymen., vol. 2 (1893), p. 37. 



Body rugose, shagreened or punctate, rarely entirely smooth. 

 Scutellum without cups, sometimes with deep impression on disc but 

 not cup-shaped. Wings usually with three more or less complete 

 cubital cells, cubitus arising in the middle of the basal vein (in one 

 species wanting altogether). Areolet closer to base of radial cell than 

 middle. Second segment of posterior tarsi without spine. Pour first 

 abdominal tergites of unequal size, second nearly always at least half 

 as long as abdomen. Sternites ordinarily more or less visible-; Hypopy- 

 gium usually teminating in a point, ventral valve at least as long as 

 broad, sometimes plowshare-shaped. Phytophagous species, living 

 in galls. 



KEY TO GENERA. 



1 Wings more or less foreshortened, not reaching beyond tin- middle of the 



abdomen 2 



Wings normally developed 3 



2 Thorax covered with a dense pubescem e, Bat, closely punctate; mesonotum 



glabrous in the middle; antennae 12-segmented. Galls on Quercus.... 



5 Trichoteras Ashm. 

 Thorax only sparsely pubescent, evenly rugose or wrinkled; antennae 13-14 



segmented. Galls on Quercus 1 Biorhiza Westw. 



:; 1st abdominal segment longitudinally striate, 2d and 3rd segments con- 

 nate; face radiately striate; ventral valve short. Inquilines in galls on 



Quercus !t Synergus Hartig 



1st abdominal segment smooth 4 



4 Face with two parallel ridges from insertion of antennae to elypeus; 

 antennae 9 12-14 segmented, cf 14-1") segmented; scutellum with basal 

 foveas; radial cell closed. Inquilines in galls on Quercus. .10 Ceroptres Hartig 

 Face without such ridges 5 



