JAMES CHESTER BRADLEY 311 



6. First abdominal segment almost sessile with the second, distinctly widened 



toward the apex, and fully as long as wide at the apex, without pubescence 

 except for a median apical tuft; antennae not quite touching one another 



at base Sphaerophthalma Blake 



First segment of the abdomen much smaller than the second, petiohform, 

 not widened toward the apex, transversely quadrate, entirely white 

 pubescent; antennae touching one another at base Ephuta Say 



7. Pygidium granulate or longitudinally striate, except sometimes at apex; 



mandibles without a third tooth within. 



Dasymutilla Ashmead, subgenus Dasymutilla Ashmead 

 Pygidium rugulose; mandibles tridentate (often worn away). 



Dasymutilla Ashmead, subgenus Bruesia Ashmead 



Keys to the Species of Mutillidae known to occur in the 

 Eastern United States 



PSEUDOMETHOCA Ashmead 



Subgenus Pseudomethoca Ashmead 



Males and Females 



Only one eastern species. canadensis (Blake) 



Subgenus Nomiaephagus Ashmead 



Males 



1. Ground color entirely coal-black, pubescence black and white or partially 



fiery red (2) 



At least the second abdominal segment of an orange color; pubescence 

 almost entirelj^ black, with a slight admixture of yellowish (3) 



2. Each dorsal segment with an apical band of fiery red pubescence. 



vanduzei n. sp. 

 Pubescence white, with a slight admixture of black, no red. geryon (Fox) 



3. Clypeus narrowly notched at apex, with a very prominent papilliform tooth 



on each side oceola (Blake) 



Clypeus shallowly emarginate, with a weak angle at each side. 



sanbornii (Cresson) 



Females 



1 . Head wider than the thorax, as wide behind the eyes as its width measured 



from one extreme lateral extension of the eyes to the other; narrower 

 diameter of the eyes equal to .6 of the width of the temples behind 



them (2) 



Head no wider than the thorax; narrower diameter of the eyes equal to the 

 width of the temples behind them (3) 



2. Pygidium transversely rugulose; posterior face of the propodeum at right 



angles with the dorsal hippodamia (Fox) 



TRANS. AM. ENT. SOC, XLII. 



