% 



REVISION OF THE GENUS EXETASTES — CUSHMAN 303 



Legs very slender; hind femur fully three-fourths as long as tibia; 

 inner hind calcarium more than half as long as basi tarsus; apical 

 tarsal joint much shorter than third. 



Wings: Apical abscissa of radius moderately curved at base, about 

 a half longer than basal abscissa ; second recurrent less than two-thirds 

 as long as basal abscissa of subdiscoideus; nervulus slightly postf ureal; 

 abscissula twice as long as intercubitella. 



Abdomen polished, strongly compressed, and very deep apically; 

 first tergite a little more than twice as long as broad at apex, second 

 slightly longer than broad at base; ovipositor short, straight, sheath 

 only about a third as long as first tergite. 



Black, with abdomen ferruginous, tergites beyond sixth and apex of 

 hypopygium blackish; wings deeply infumate. 



Type locality. — Siskiyou County, Calif. 



r?/^e.— U.S.N.M. no. 51826. 



One specimen. 



49. EXETASTES CORVINUS. new species 



Similar in structure to dichrous, but at once distinguishable by its 

 black abdomen. 



Female: — Length 13 mm, antennae 11 mm. 



Differs from dichrous as follows: Temples even more strongly reced- 

 ing; face twice as broad as long; malar space two-thirds basal width 

 of mandible; eyes slightly convergent below; antenna 64-jointed, 

 slender, attenuate at apex; propodeum very coarsely reticulate rugose, 

 this sculpture also invohdng most of the metapleurum. 



Abdomen entirely black. 



Type locality. — Vya, Washoe County, Nev. 



Type. — Cornell University. 



One specimen, July 19, 1927, H. E. Guerlac. 



50. EXETASTES FLAVIPENNIS Cresson 



Exetastes flavipennis Cresson, Proc. Ent. Soc. Philadelphia, vol. 4, p. 275, 1865; 

 female. 



This and the rest of the species form a group most closely related 

 to the genotype, fornicator (Fabricius). They are characterized by 

 receding temples; large convergent eyes; long, wealdy divided clypeus; 

 moderately long, usually somewhat concave malar space; long man- 

 dibles, only sHghtly narrowing apically; long slender antennae with 

 from 50 to 60 joints, apically somewhat attenuate in female; evenly, 

 rather densely punctate thorax; usually more or less distinctly im- 

 pressed notauH; strongly convex, immargined scutellum; rugose 

 propodeum with the rugosity coarser and somewhat elevated medially 

 and with longitudinal and apical carinae more or less indicated; 

 long, rather stout hind legs with femora fully three-fourths as long 



