250 PROCEEDINGS OF THE NATIONAL MUSEUM vol, 84 



distinct, setting off a very short petiolar area; second recurrent 

 vein nearly straight; abdomen barely longer than head and 

 thorax, hardly compressed at apex; ovipositor sheath barely 

 extending beyond apex of abdomen; very small species witli 

 head and thorax black, or black and ferruginous, with yellow 



markings, and abdomen largely red 6 



Clypeus usually broader and more distinctly divided; apical 

 carina absent, or if more or less indicated it is farther from 

 apex; recurrent vein usually distinctly flexed or curved; 

 abdomen longer than head and thorax and, in female, more or 

 less compressed at apex; sheath extending distinctly beyond 

 apex of abdomen, sometimes very long 7 



6. Propodeum and metapleurum largely or entirely ferruginous. 



6. bioculatus Cresson 

 Propodeum and metapleurum black with apices broadly yellow. 



5. pictus, new species 



7. Face broader than length of tlie unusually small eyes, flat with a 



prominent median rounded elevation; clypeus more than twice 

 as broad as long, transversely divided close to base; second 

 recurrent nearly straight; ovipositor recurved, sheath more 



than half as long as abdomen 8 



Face rarely as broad as length of eye; clypeus not more, usually 

 much less, than twice as broad as long; recurrent usually more 



or less distinctly curved or flexed; ovipositor shorter 9 



.8. Mesoscutum immaculate; wings infumate 7. ridens, new species 



Mesoscutum with conspicuous yellow markings; -wings hyaline. 



8. illinoiensis (Walsh) 



9. Pale lemon yellow with small black or reddish markings; ocelli 



unusually large, their diameter in female at least nearly as long 

 as ocellocular line; malar space in female nearly as long as basal 

 width of mandible; ovipositor long and recurved, sheath 



longer than first tergite ; hind femur short and stout 10 



Black or ferruginous or both, rarely with yellow markings; ocelli 

 very rarely so large; differing also by one or more of the other 

 characters H 



10. Abdomen with black markings; ocellocular line in female shorter 



than diameter of oceUus 9. flavus, new species 



Abdomen with pale reddish markings; ocellocular line in female 



slightly longer than diameter of ocellus 10. pallidas, new species 



11. Head very thick, with occiput shallowly concave, temples broad 



and very strongly convex; legs stout, hind femur not, or little, 

 more than two-thirds as long as tibia; claws in female strongly 

 pectinate (abdomen stout with first tergite much more than 



half as broad as long) 12 



Head not especially thick, occiput more deeply concave, temples 

 at most moderately convex and strongly receding; hind 

 femur relatively longer; claws usually simple 17 



12. Clypeus with apical portion abruptly impressed below level of 



basal portion, the basal portion forming a strong transverse 

 ridge; malar space in female barely, in male less than, half as 

 long as basal width of inaudible; wings in both sexes distinctly 

 infumate; ovipositor straight, sheath not longer than first 

 tergite 13 



