REVISION OF GENXrS EUCERCERIS CRESSON 5 



21. (Scattered records throughout the southwestern states and into central 



Mexico) canaliculata atronitida Scullen > 



(Recorded only from 32 mUes SE. of Guaymas, Mexico) 



sonorae, new species * 



22. Complete broad bands on terga 1 to 5, covering basal as well as apical 



ridges 23 



Basal ridges and depressed areas of three or more terga largely black, but 

 apices of terga banded 27 



23. Scutum immaculate (Bay area of central California) . . ruficeps Scullen 

 Yellow or creamy white wedge-shaped patches or stripes on the anterior 



portion of the scutum 24 



24. Markings creamy white 25 



Markings yellow 26 



25. Enclosure immaculate (western Nevada) elegans elegans Cresson 



Enclosure vnth two small oval patches (Mojave Desert area of California 



mojavensis, new species 



26. Background color of thorax and abdomen black (east central area of Cali- 



fornia) elegans monoensis, new subspecies 



Background color of thorax and abdomen largely ferruginous (southwestern 

 desert areas, southern California to western Texas and north to Nebraska) 



apicata Banks 



27. Short row or cluster of short bristles on 5th sternum 28 



No distinct row or cluster of bristles on 5th sternum 31 



28. Enclosure relatively smooth with oval creamy white or yellow patches; light 



vittae of face may or may not fuse above the antennae; body surface glossy 



29 

 Enclosure immaculate and distinctly ridged over entire surface .... 30 



29. Light vittae of face usually convergent above antennae; small evanescent 



lateral spots on the scutum; markings light yellow to cream (southeastern 



Oregon, southern Idaho, southwestern Wyoming) . . . barri, new species 



Light vittae of face broadly separated above antennae; scutum immaculate; 



markings yellow (southern Oregon, northern California) . . similis Cresson 



30. Ferruginous area back of compound eye; creamy white vittae of face do not 



fuse above the antennae (Baja California, Mexico) .... baja Scullen 



Black and creamy white only, no ferruginous back of the eye; light vittae of 



face fuse above the antennae (Baja California, Mexico) . . pacifica Scullen 



31. Legs dark ferruginous to fuscous; enclosure immaculate; body black with 



creamy white markings, no ferruginous (central plateau area of Mexico, 

 one record each from western Texas and southern New Mexico) 



morula morula, new species 



Legs ferruginous; terga 1 and 2, and all of sterna more or less infused with 



ferruginous; evanescent small spots of cream on enclosure (south central 



New Mexico and western Texas) . . . morula albarenae, new subspecies 



32. Third tergum largely ferruginous (southwestern states, north central Mex- 



ico) tricolor Cockerell 



AH terga black with yellow to cream-colored markings 33 



• The males of canaliculata atronitida Scullen and sonorae Scullen at present 

 are indistinguishable except when associated with the females. 



