134 W. H. ASHMEAD. 



Subfamily— TETRASTICHIN^. 

 GYROIiASIA Forster. 



40. Gyrolasia nigrocyaneus n. sp. 



9 • — Length .10 inch. Blue-bhick ; head, thorax and abdomen punctate ; an- 

 tennse 6-joiuted, hairy, joints separated and almost moniliform, black; scape, 

 coxse and femora tawny yellow, tibise and tarsi pale yellow, ungues with poste- 

 rior apical tarsal joint brown ; wings hyaline, marginal vein more than twice as 

 long as submarginal, no postmarginal vein. 



Described from one 9 specimen bred from Cynipidous oak gall 

 Dryorhizoxenus fioridanus Ashm. 



TETRASTI€HITS Haliday. 



41. Tetrasticlius racemarite n. sp. 



% 9 .—Length .07 to .09 inch. Aeneous black, smooth ; scape of antennje 

 tawny yellow, flagellum, coxae and femora black, trochanters and a narrow an- 

 nulus near base of tibiae piceous brown, tibiae and tarsi yellowish white ; scutel- 

 lum with two large parallel grooves; wings hyaline, veins yellowish, the post- 

 mai-ginal vein wanting; there is no noticeable difference in the % . 



Described from three % bred from Cynipidous oak gall Amphi- 

 holips racemaria Ashm., and numerous specimens in both sexes bred 

 from oak gall Amphibollps cinerea Ashm. 



The specimens bred from the latter are much the smaller, but 

 otherwise similar. 



42. Tetrasticliiis rosse n. .sp. 



% 9- — Length .04 -.06 inch. Black, shining; antennpe, femora and wing 

 veins yellowish, ungues brown ; scutellum with two longitudinal grooves, post- 

 marginal vein in 9 M'anting, in % slightly developed. 



Described from several specimens bred June, 1881, from the rose 

 gall Bhodites ignota O. S. 



This species resembles T. racemarke somewhat, but its much smaller 

 size and the color of antennae and legs will at once distinguish it, 



43. Tetrasticlius acntiis n. sp. 



% . — Length .08 inch. Blue-black with greenish metallic reflections ; face 

 greatly emarginate, making the head very sharp on vertex ; eyes and antennae 

 brown ; antennae 6-jointed ; thorax and scutellum with microscopical longitudinal 

 engraved lines ; scutellum with two grooves ; abdomen acutely pointed, rather 

 .strongly tinged with greenish metallic reflections, posterior coxae green; legs 

 yellow, posterior femora brown, excepting the yellow tip, ungues brown. 



Described from one specimen captured at large. 

 A very distinct species. 



