262 PROCEEDIK'GS OF THE NATIONAL MUSEUM vol.84 



Head thicker with temples longer and less sharply receding (about 

 45° to longitudinal axis of body); extended angle of cheeks hardly 

 acute; postocellar line about equal to ocellocular line; antenna 43- 

 jointed; propodeum more distinctly rugose and with a median longi- 

 tudinal groove basally, ple«aral carina distinct throughout with the 

 spiracle far above it; outer angle of areolet nearly right, recurrent 

 beyond middle; nervulus slightly postfurcal; abscissula hardly a half 

 longer than intercubitella. 



Antennal annulus beginning on flagellar joint 11 ; scape more or less 

 distinctly reddish or yello^\^sh below; propodeum and metapleurum 

 largely or entirely ferruginous, not at all yellow; mesopleurum entii'ely 

 black below; all coxae and trochanters ferruginous, only front coxa 

 yellowish in front; hind tarsus yellow with more or less of basitarsus 

 and the apical one or two joints brownish. 



Male. — Temples much more strongly convex; abdomen depressed 

 throughout. 



Propodeum usually more extensively black; front coxa and trochan- 

 ter and hind tarsus more extensively yellow. Otherwise like female. 



Type locality. — Of bioculatus, Texas; of brevicorpa, Algonquin, 111. 



Type. — Of bioculatus, U.S.N.M. no. 4018; of brevicorpa, Acad. 

 Nat. Sci. Philadelphia no. 4329. 



Remarks. — In addition to the types of both names the material 

 examined includes five specimens of each sex as follows: Browns\ane, 

 Tex., May 1921, J. C. Bridwell; Victoria, Tex., April 19, 1913, J. D. 

 Mitchell; Onaga, Kans., Crevecoeur; (homotype of brevicorpa) Law- 

 rence, Kans., Hugo Kahl; Lexington, Ky.; Dixie Landing, Va., May 

 27, C. L. Marlatt; Rosslyn, Va., June 15, T. Pergande; and George- 

 town, D. C, H. H. Smith. 



7. EXETASTES RIDENS, new species 



Plate 18, Figure 55; Plate 19, Figure 74; Plate 20, Figure 91; Plate 21, 



Figure 117 



This species and illinoiensis (Walsh) form a distinct group character- 

 ized by the very broad short face and clypeus, small eyes, long, narrow, 

 and strongly curved mandibles, short calcaria, nearly straight second 

 recurrent vein, and very long strongly upcurved ovipositor. 



Female. — Length 12 mm, antennae 9 mm. 



Head thin medially, occiput deeply concave, temples long convex, 

 modcratel}^ receding; subpolished, minutely sparse^ punctate; frons 

 nearly flat, densely finely punctate; face nearly three times as broad 

 as long, nearly flat with a small prominent median elevation, finely 

 densely punctate; clypeus nearly three times as broad as long, dis- 

 tinctly transversely divided near base, broadly rounded and medially 

 straight or weakly emarginate at apex; basal portion more closely and 



