114 U. S. NATIONAL MUSEUM BULLETIN 216 



12. Pedicel white, its upper outer side brownish; soape white in front; punctures 



of third tergite distinct, moderately coarse 13 



Pedicel black; scape black or with a white spot in front; punctures of third 

 tergite rather indistinct and small 14 



13. Apical part of clasper wider (fig. 354) ; median longitudinal carinae of pro- 



podeum distinct 15. vitticrus, new species 



Apical part of clasper narrower (fig. 356) ; median longitudinal carinae of pro- 

 podeum not distinct 17. pterelas (Say) 



14. First tergite about 1.85 as long as wide; third tergite with weak fine punctures 



and rather distinct transverse aciculation ; scape with a small white spot in 



front 12. aciculatus (Hell^n) 



First tergite about 2.5 as long as wide; third tergite with moderately weak 

 fine punctures and indistinct transverse aciculation; scape entirely black 



18. imperator (Kriechbaumer) 



FEMALES 



1. Abdomen mostly red; coxae black. Ibritatob group (p. 128), in part. 



9. irritator (Fabricius) 



Abdomen entirely black; coxae mostly or entirely fulvous, the front coxa 



sometimes white 2 



2. Dorsally projecting flange of lower valve of ovipositor with two widely spaced 



ridges (fig. 330, g). Imperator group (p. 152) 3 



Dorsally projecting flange of lower valve of ovipositor with four or more 

 closely spaced ridges (figs. 330, c-f: 330,h) 4 



3. Punctures on second to fourth tergites moderately coarse and distinct; second 



tergite strongly narrowed toward its base, about 0.7 as wide at base as at 

 apex; propodeal carinae obsolescent, distinct only on the basal 0.15 to 0.4 



of the propodeum 17. pterelas (Say) 



Punctures on second to fourth tergites very small, close, and somewhat ob- 

 scured by aciculation; second tergite weakly narrowed toward its base, 

 about 0.85 as wide at base as at apex; propodeal carinae strong, distinct on 

 the basal 0.4 or more of the propodeum . 18. imperator (Kriechbaumer) 



4. Pronotum with a white stripe on its upper margin extending forward from its 



hind corner; basal three ridges on ovipositor tip slanted forward and down- 

 ward (fig. 330, c). Taeniatus group (p. 116) 5 



Pronotum without a white stripe on its upper margin, its hind corner black, 

 white, fulvous, or reddish brown; basal three ridges on ovipositor tip 

 usually approximately vertical (figs. 330,d,e,f,h) 7 



5. Clypeus with a small median apical tooth; prepectal carina absent; punctures 



on mesopleurum moderately coarse and close, their interspaces about 0.7 



their diameter 3. cuspidatus, new species 



Clypeus without a median tooth; prepectal carina present below; punctures 

 on mesopleurum rather fine and distant, their interspaces more than 2.0 

 their diameter 6 



6. Front coxa white; temple moderately convex; abdomen a little narrower and 



more coarsely punctate, the second tergite about 1.16 as long as wide. 



1. doiichosoma (Viereck) 

 Front coxa fulvous; temple rather strongly convex; abdomen a little wider 



and more finely punctate, the second tergite about 1.13 as long as wide. 



2. taeniatus, new species 



7. Lower half of mesepimeron with rather dense hairs; clypeus with a narrow, 



weakly raised and delimited basal area. Sericeus group (p. 157). 



19. sericeus (Hartig) 



