KO. 2219. A REVISION OF THE CREMASTINI—CUSinfAN. 513 



18, Compressed portion of abdomen distinctly more than three times as long as deep, 



third tergito nearly as deep as fourth; diameter of posterior ocelli as long as 

 ocell-ocular line and much more than half as long as postocellar line; portion 

 of propodeum beyond insertion of coxae, viewed from above, deeply, con- 

 cavely emarginato laterally, the posterior lateral angle nearly riglit. 



forbesii Weed. 

 Compressed portion of abdomen barely three times aa long as deep, third tergite 

 distinctly less deep than fourth; diameter of posterior ocelli distinctly 

 shorter than ocell-ocular line and barely more than half as long as postocellar 

 line; portion of propodeum beyond insertion of coxae shallowly concave, the 

 posterior lateral angle obtuse epngoges, new species. 



19, Head subrostriform; malar space much longer than basal width of mandible. 



roslratus, new epeciea. 



Head not subrostriform; malar space rarely as long as basal width of mandible, 



most frequently shorter 20. 



20, All coxae pale, the hind pair not at all black or blackish at base 21. 



At least the hind coxae black or blackish at base 26. 



21|Prothorax much paler than surrounding areas 22. 



Protliorax concolorous with surrounding areas 25. 



22. Mesoscutum entirely black 23. 



Mesoscutum with notauli or lateral lobesdifferently colored 24. 



23. Scutellum black; clypeus very weakly rounded at apex, nearly truncate; inter- 



foveal line but little greater than foveo-ocular line (shortest distance from 



fovea to eye) cleridivorus, new species. 



Scutellum red; clypeus strongly rounded apically; interfoveal line nearly twice 

 as long as foveo-ocular line similis, new species. 



24. Thorax laterallj'^ largely black or blackish plesius, new speciea. 



Thorax laterally largely red. rosac, new species. 



25. Ovipositor sheath little more than twice as long as first tergite; malar space much 



shorter than basal width of mandible; eyes large, much longer than width of 



face tciralophae, new species. 



Ovipositor sheath nearly four times as long aa first tergite; malar space subequal 

 to basal width of mandible; eyes smaller, not much longer than width of 

 face tercbratus, new species. 



26. Small species (6 mm. or less) with abdomen black throughout, sometimes obscurely 



reddish in middle 27. 



Large species (7 mm. or more) with first two tergites (occasionally only first one) 

 black, the others red or piceous, sometimes more or less yellow or black or 

 both 28. 



27. Face fully a third wider than length of eye; eyes strongly divergent below; 



clj'peus and mandibles piceous, the former very weakly separated, rather 

 narrow, and much more than half as long as wide; ocelli scarcely half as wide 

 as ocell-ocular line; temples broad, strongly rounded. 



mordellistcnoe, new epeciea. 

 Face scarcely wider than eye length; eyes scarcely divergent; clypeus and mandi- 

 bles yellow, the former distinctly separated and scarcely half as long as broad; 

 ocelli nearly as wide as ocell-ocular line; temples narrow, flattened; orbital 

 ring interrupted at top of eye with a large triangular spot in the interruption 

 which nearly reaches the lateral ocellus. 



incomplclus (Provancher). 



28. Scutellum strongly convex, without lateral carinae or ridges; tergites beyond 



third strongly compressed 29. 



Scutellum carinate or ridged laterally and usually flattened; tergites not strongly 



compressed 30. 



77403— Proc. N. M. vol. 53—17 33 



