REVISION OF THE GENUS EXETASTES — CUSHMAN 295 



right angle ; malar space very nearly as long as basal width of mandible ; 

 mouth barely as broad as width of face, mandibles rather narrow; 

 distance betv/een junction of occipital and hypostomal carinae and 

 base of mandible httle more than half basal width of latter; eyes 

 moderately convex, longer than width of face, parallel; ocellocular 

 hne little longer than diameter of an ocellus and much shorter than 

 postocellar line; antenna 51- to 55-jointed, rather slender, first joint of 

 flagellum distinctly less than twice as long as second, which is hardly 

 more than twice as long as thick, joints of apical third shorter than 

 thick. 



Thorax densely and finely punctate, shining; notauli absent; scu- 

 tellum rather elongate subtriangular, moderately convex, sparsely 

 punctate; propodeum rather weakly convex, reticulate rugulose, 

 apical carina distinct at least medially; spiracles elongate, close to the 

 distinct pleural carinae. 



Legs slender, hind femur more than three-fourths as long as tibia; 

 inner hind calcarium more than half as long as basitarsus, apical 

 tarsal joint shorter than third. 



Wings: Apical abscissa of radius rather strongly curved at base, 

 fully a half longer than basal abscissa; areolet oblique, the lower angle 

 distinctly apicad of upper angle; second discoidal cell scarcely a half 

 longer on subdiscoideus than broad, recurrent strongly curved or sub- 

 angulate above; nervulus antefurcal or subinterstitial ; abscissula less 

 than twice as long as intercubitella. 



Abdomen polished, shallow, rather slender and strongly compressed 

 apically; first tergite distinctly decurved, slightly more than twice as 

 long as broad, sparsely punctate, petiole in dorsal view more or less 

 constricted; second tergite distinctly longer than broad at base; 

 ovipositor straight, strongly compressed, sheath three-fourths as long 

 as first tergite. 



Head and thorax black; apex of clypeus, anterior margin and hu- 

 meral angle of pronotum, and scutellum at apex yellowish or reddish; 

 abdomen and legs ferruginous, hind tibia and tarsus more or less 

 darker, joints 3 and 4 of tarsus yellowish; sheath piceous; wings 

 hyaline, venation dark brown. 



Male. — Malar space slightly shorter; ocelU slightly larger; antennae 

 as long as body; yellow markings of thorax larger and including apices 

 of tegulae ; hind tibia at apex and tarsus definitely black, tarsal annulus 

 more distinctly yellow; otherwise essentially like female. 



Type locality. — Colorado. 



T^/P^.— U.S.N.M. no. 51820. 



Paratypes. — Canadian National Collection; Cornell University. 



Remarks. — Nineteen females and 16 males ranging from Colorado 

 and Alberta, west to Utah, Idaho, Washington, and British Columbia, 



