364 Annals Entomological Society of America [Vol. IV, 



metanotum pubescent. Abdomen smooth, shining, very much com- 

 pressed, 2nd segment occupying more than two-thirds its length, 

 posterior margin finely punctate, ventral valve conspicuous, paler than 

 the rest of the abdomen, dorsal valve darker and pubescent, ovipositor 

 sheath conspicuously exserted. Wings hyaline, pubescent, veins dis- 

 tinct, yellowish, radial cell open at the margin, vein at base arcuate, 

 almost angulate, areolet distinct, cubitus not reaching basal vein. 

 Length 3-3.5 mm. 



Gall (PI. XXIII, fig. 5). Acorn galls at the tip of leafy twigs of 

 Quercus chrysolepis. 15 mms. long, and double, the basal portion 

 smaller, and telescoped in the upper portion ; rugose and covered with a 

 whitish bloom. Monothalamous. 



Habitat. Stevens Creek Canyon, above Cupertino, Cal. 

 (R. W. Patterson.) 



9 SYNERGUS Hartig. 



Synergus (part.), T. Hartig, Zeits. f. Ent., vol. 2 (1840), p. 186, 197. 



Face radiately striated, clypeus imperceptible or nearly so, subdorsal 

 frontal grooves always present, usually long. Antenna- 13-15 seg- 

 mented in female, 14-15 segmented in male, distally from 3rd segment in 

 female filiform, in male often thickened, 3rd segment often strongly emar- 

 ginate basally and distally more or less thick. Mesonotum shagreened, 

 very often transversely wrinkled, parapsidal grooves complete, scutellum 

 with basal fovea?. Abdomen compressed, 1st segment or petiole longi- 

 tudinally striate, tergite of the 2nd segment greatly enlarged and 

 covering the greater part of the abdomen, or in the male obscuring it, 

 2nd and 3rd tergites joined without suture and enclosing following 

 segments. Radial cell closed, short. Claws bidentate. Ventral valve 

 short. Inquilines in galls on Quercus. 



Synergus agrifolise Ashm. 

 Synergus agrifoliae, Ashmead, Tr. Am. Ent. Soc, vol. 23 (1896), p. 189. 



"Female. Length 2-2.4 mm. Brownish yellow, the legs and coxa? 

 paler, the metathorax dusky; ocelli, eyes and mandibles black, or brown- 

 black. The face and pleura are finely striated, head and thorax finely 

 , minutely rugose, pubescent, the parapsidal furrows wanting, the foveas 

 of scutellum small, shallow, hardly apparent; antennas 13-jointed, 

 flagellar joints 2 and 3 equal, little shorter than the first. The abdomen 

 is not quite as long as the head and thorax combined, slightly conpressed, 

 and vertically it is almost 'as wide as long with the tips sometimes 

 dusky. Wings hyaline, pubescent, the veins pale or hyaline, the areolet 

 distinct, but the closing vein very delicate; in two specimens it is absent. 



"The male is but 1.5 mm. long, and, excepting the black eyes and 

 ocelli, entirely brownish yellow. 



"Habitat. Los Angeles, California. 



"Described from thirteen specimens, bred by Mr. Albert Koebele, 

 from a gall not unlike Neuroterus saltalorius Edw., occurring on Quercus 

 agrijolia. " (W. H. Ashmead). 



I have not seen examples of this species. 



