ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 147 



14. Genus Leurus 



Figure 173,b 

 Leurus Townes, 1946, Bol. Ent. Venezolana, vol. 5, p. 59. Type: Exochus 

 caeruliventris Cresson; original designation. 



Front wing 5.0 to 6.7 mm. long; punctures on face very coarse, on 

 rest of head and body mostly rather small and weak; combined face 

 and clypeus roundly convex; upper margin of face produced medially 

 as a strong triangular point; face without a median carina or process; 

 temple convex, rather short; head in profile sloping obliquely from 

 hind margin of hind ocelli to occipital carina; occipital carina strong 

 dorsally, weaker laterally, and sometimes absent ventrally; cheek 

 about 0.5 as long as basal width of mandible; mandible large, rectan- 

 gular, with its apex abruptly tapered and a carina along its lower 

 margin, its upper tooth of moderate length, its lower tooth very 

 short; labrum concealed; flagellum rather short, filiform; upper edge 

 of pronotum wide, broadly rounded; propleurum weakly convex; 

 scutellum moderately convex, without lateral carina; areolet small, 

 subtriangular, stalked above; nervulus postfurcal by about 0.45 its 

 length; nervellus broken near its lower 0.35; prepectal carina strong, 

 ending dorsally at front end of subtegular ridge; sternaulus not dis- 

 tinct; metapleurum polished, impunctate; propodeum rather long, its 

 apical part abruptly declivous; propodeal carinae complete except 

 that costula is absent and areola and median basal area confluent; 

 propodeal spiracle long oval, large; legs stout; base of hind coxa ex- 

 tending posterior to its socket as a strong shoulder; second trochanter 

 of front and middle legs completely fused with its femur; spurs of 

 middle tibia of equal length ; tarsal claws apparently simple ; abdomen 

 approximately parallel-sided; first tergite rather broad basally, its 

 lateral carinae strong to apex, its median carinae strong basally, fading 

 out near apical 0.67; second tergite without median carinae; epi- 

 pleurum of first two tergites very narrow, of third and following 

 tergites wide; seventh tergite not retracted in either sex; female sub- 

 genital plate large, unspecialized. 



This genus contains the genotype and an undescribed species from 

 Brazil. In the original description of Leurus it was stated that the 

 genus contained the genotype and two very distinct, unnamed Nearctic 

 species. The two unnamed species referred to are now placed in the 

 genus Carria, and Leurus is restricted to species very closely related 

 to the genotype. 



1. Leurus caeruliventris (Cresson) 



Figure 173,b 

 Front wing 5.0 to 6.7 mm. long; combined face and clypeus about 

 0.95 as wide as high, with very coarse, regular, subadjacent punctures 

 and no transverse wrinkling; outer face of mandible moderately con- 



