160 KANSAS UNIVERSITY SCIENCE BULLETIN. 



10. Disc of propodeum granulate, and in addition has irregular though 



strong more or less longitudinal striae extending from one end 

 of the disc to the other; clypeus with one lateral tooth; upper 

 portion of frons with separate punctures, finely reticulate be- 

 tween punctures; abdomen all red scidpHloides 



Disc of propodeum coarsely wrinkled ; abdomen with only first and 

 second segments red qvehecensis 



Disc of propodeum not as above; wholly or in part red 11 



11. Clypeus entire; medium-sized to rather large species 12 



Clypeus with one lateral tooth (fig. 72) ; small species, about 



6 mm. long 13 



12. Abdomen entirely red ; the second submarginal cell usually dis- 



tinctly broader than the third along the radius; truncation of 

 marginal cell only a little oblique and a little less than one-half 

 as long as the distance from the third submarginal (along the 

 radius) to truncation (fig. 47) ; clypeus not produced mesad; 



length, 7.5-10 mm texanus 



Abdomen black apically; second and third submarginal cells usu- 

 ally subequal along the radius; truncation of marginal cell de- 

 cidedly oblique, and always more than one-half as long as the 

 distance from the third submarginal cell to truncation ; an- 

 terior margin of clypeus a little produced mesad; length, 



7 mm consimilisl 



13. Abdomen black apically; slender species nigrocamlatus 



Abdomen entirely red 14 



14. Form stout; as viewed laterally the abdomen is not or scarcely 



longer than thorax and propodeum crassiformis 



Form slender; abdomen tapering gradually eaudad, distinctly 

 longer than thorax and propodeum plenoculiformis 



15. Abdomen entirely red (clear or obscure) ; clypeus with one lat- 



eral tooth (fig. 62), and sometimes with a shallow emargina- 



tion mesad ; length, 8-11 mm tarsatus 



Abdomen black apically; clypeus entire; scutum finely granular- 

 punctate, subopaque ; length, 7.75 mm consimiloides 



16. Wings subfuscous, venation heavy, marginal cell broadly truncate, 



the third submarginal cell along the radius as broad as the 

 length from the third submarginal cell to truncation (fig. 48) ; 

 frons very finely granulate, ocellar region (as viewed through 

 a hand lens) opaque; clypeus entire or with an indistinct tooth 



laterally amta 



Wings clear or nearly so, venation not heavy, third submarginal 

 cell along the radius seldom as broad as the length from the 

 third submarginal to truncation; ocellar region shining 17 



17. Clypeus broadly though not strongly rounded anteriorly, entire. 



sepulcralis 

 Clypeus subtruncate anteriorly, produced a little mesad, two lat- 

 eral teeth (including the rather drawn-out edge of clypeus). 



glabrior 



