312 NORTH AMERICAN MUTILLIDAE 



Pygidium longitudinally striate; posterior face of the propodeum at an 



obtuse angle to the dorsal simillima (Smith) 



3. Pygidium obliquely striated aetis (Fox) 



Pygidium finely rugulose montivaga (Cresson) 



DASYMUTILLA Ashmead 



Subgenus Bruesia Ashmead 



Males 

 The only eastern species of which the male is known is ... . bexar (Blake) 



Females 

 The only eastern species of which the female is known is . . harmonia (Fox) 



Subgenus Dasymutilla Ashmead 



Males 



1. Color entirely black, with white pubescence gibbosa (Say) 



Color not entirely black (2) 



2. Top of head, mesonotum, and scutellum with long, dense, scarlet or yel- 



low pubescence (3) 



Top of head, mesonotum, and scutellum with short, sparser, black pubes- 

 cence (^) 



3. First and second dorsal segments with rather dense black pubescence, 



remaining dorsal segments with dense, scarlet or yellow, long pubescence, 

 except sometimes for a transverse band of black pubescence, occupying 



the fifth and parts of the fourth and sixth segments (4) 



Abdomen dorsally with moderately dense black pubescence, except on the 

 apical half of the second segment where it is yellowish . . pyrrhus (Fox) 



4. Punctuation of second dorsal segment sparse medially, so that the segment 



is more or less shiny in that spot, ventrally the segment has rather even 



strong punctures occidentalis (Linnaeus) 



Punctuation of the second dorsal segment even throughout, ventrally the 

 punctures are not so strong or regular as in occidentalis; segment 

 three and the following usually with fulvous pubescence. 



conianche (Blake) 



5. Abdomen entirely red or yellowish, except the petiole, .obscura (Blake) 

 Abdomen black, except for the second and sometimes the third segment (6) 



6. Pubescence of second dorsal segment black throughout (7) 



Pubescence of second dorsal segment yellow or scarlet, at least in part (9) 



7. Punctuation of first al)dominal segment unusually coarse and irregular; 



propodeum coarsely reticulate (8) 



Punctuation of first dorsal segment and reticulation of propodeum more 

 shallow and less coarse. (Al)errant individuals) castor (Blake) 



8. Entire second and third abdominal segments red; legs, petiole, and venter 



with erect white pubescence obscura (Blake) 



Third abdominal segment and usually the second ventral, black; legs, 

 petiole, and venter with erect black pubescence canella (Blake) 



