352 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



8. Baud on tergum 3 missing, a broken line, or divided into three sections; spot 



on first tergum very small or absent; lateral lobes of the clypeus black . 9 

 Baud on tergum 3 unbroken but emarginate 10 



9. Band on tergum 3 divided at two points to form three parts subequal in 



length (in some specimens these divisions are represented by indentations 

 only); entire face black except for two large frontal eye patches; medial 

 denticle on the clypeal margin more prominent than the others (west of 

 the Rocky Mountains from British Columbia to Texas). 



convergens Viereck and Cockerell (in part) 

 Band on tergum 3 usually a broken or evanescent line; lateral lobes and 

 lower margin of the medial lobe of the clypeus black; frontal area black 

 with a small evanescent spot of cream (Southwestern States). 



kennicottii beali ScuUen 



10. Tergum 1 immaculate; apex of median lobe and lateral lobes of clypeus 



black; face otherwise creamy yellow cleome Rohwer 



Tergum 1 with a distinct patch 11 



11. Clypeal denticles clearly defined; tegulae showing a tendency to be elevated 



and inflated; light apical end of the third femora demarked somewhat 



obliquely (Southwestern States) finitima vierecki Banks 



Clypeal denticles less elevated and distinct ; tegulae not elevated or inflated ; 

 light apical end of the third femora demarked nearly at right angle to the 

 femur 12 



12. Scutellum immaculate; pygidium nearly as broad as it is long. 



crandelli ScuUen 

 Scutellum ■with two cream patches; pygidium about one and one-half as 



long as it is broad acanthophila Cockerell 



(also carrizoensis Banks, cockerelli Viereck) 



13. Tegulae elevated 14 



Tegulae not elevated 16 



14. Tegulae smooth; enclosure smooth except for a medial groove and a limited 



number of deep pits along the lateral margins (southern Arizona). 



krombeini Scullen 



Tegulae pitted; enclosure heavily regose or ridged subparallel to the anterior 



border 15 



15. Band on tergum 3 deeply emarginate; no yellow marks on the genae or 



occiput (more common in the Eastern States but ranges into California). 



finitima finitima Cresson ' 

 Broad band on terga 2, 3, and often 4 with little or no emargination ; com- 

 monly large yellow patches back of the eyes and a broken band on the 

 occiput (southern and central California) . . . finitima citrina Scullen 



16. Band on tergum 3 divided at two points to form three parts subequal in 



length (in some specimens these divisions are represented by indentations 

 only); entire face black except for two large frontal eye patches; medial 

 denticle on the clypeal margin more prominent than the others (west of 

 the Rocky Mountains from British Columbia to Texas). 



convergens Viereck and Cockerell (in part) 

 Band on tergum 3 reduced to a broken evanescent line or completely elimi- 

 nated medially; lateral lobes of the clypeus black; apical border of the 

 medial lobe of the clypeus black; frons black (recorded from most of the 

 Eastern States and Southwest) .... kennicottii kennicottii Cresson 



^ C. arizonella Banks appears to be a form between C. f. finitima Cresson and 

 C. f. citrina Scullen. 



