WASP GENUS CERCERIS — SCULLEN 349 



6. Markings all creamy white; band on third tergum, others a narrow line (South- 



west desert area, New Mexico) insolita albida ScuUen 



Markings on body yellow 7 



7. Single yellow patch on the propodeum; band on tergum 3 emarginate; py- 



gidium fuscous; hindfemora variable shades of amber (East Central 



States) insolita insolita Cresson 



A small secondary yellow spot often appearing on the propodeum ; band on 

 tergum 3 broad and showing little or no cmargination ; pygidium ferru- 

 ginous; hindfemora black with a creamy j-ellow patch near the apical end 

 (Southwest desert area, Arizona) insolita atrafeniori ScuUen 



MALES 



1. Stigma very dark to black 2 



Stigma light amber 3 



2. Length not over 9 mm. ; complete bands on one or more terga in addition to 



tergum 2 Group I 



Length 10 to 11 mm.; complete broad band on posterior half of tergum 2; 

 other terga with lateral markings or broken lines only, very rarely solid 

 lines fumipennis Say (of Group II) 



3. Width of clypeal hair lobes greater than the distance between them and 



extending onto the medial clypeal lobe 4 



Width of the clypeal hair lobes no greater than the distance between them 

 and not extending onto the medial clypeal lobe 7 



4. Hair lobes meet medially or nearly so; tergum 2 immaculate; posterior half 



of tergum 3 and all of terga 4, 5, and 6 fulvous .... azteca Saussure 



Hair lobes distinctly separated medially; bands on terga 4, 5, and 6 not 



all broad, at least some are narrow or deeply emarginate 5 



5. Medial denticle of the clypeal margin bicuspidate Group IV 



Medial denticle of the clypeal margin not bicuspidate 6 



6. Pygidium semioval; lateral clypeal lobe heavily setose . . tolteca Saussure 

 Pygidium elongate, approximately twice as long as it is broad; lateral 



clypeal lobe very lightly setose Group V 



7. Medial lobe of clypeus less than half as wide as lateral lobe . . . Group III 

 Medial lobe of clypeus subequal to or wider than lateral lobe 8 



8. Prominent cluster of bristles at the side of the pygidium 9 



Bristles adjacent to pygidium sparse 12 



9. Bands on all terga narrowly interrupted along midline 10 



Not all bands on terga narrowly interrupted along midline 11 



10. Pygidium broad, width subequal to length; pubescence normal. 



verticalis F. Smith 



Pygidium much longer than broad; pubescence very long on most body 



parts; pubescence on venter very prominent mimica Cresson 



11. Background color largely black bicornnta bicornuta Guerin 



Background color largely ferruginous (Southwest desert area) . 



bicornnta fidelis Viereck and Cockerell 



12. Basal width of second tergum subequal to one-third the greatest width of 



the segment Group II 



Basal width of second tergum subequal to or greater in width than one-half 

 of the greatest width of the segment 13 



13. More or less ferruginous or amber replacing the darker color, especially along 



the margins of the dorsal abdominal markings 14 



Black with yellow, cream-colored, or white markings only 16 



742^63—65^—2 



