44 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



prominent and highly polished, not faceted, or the facets very indistinctly 

 defined, as in the tribe Photopsidini ; males winged; front wings with two 

 cubital cells ; body usually very hairy or pubescent ; second abdominal segment 

 of male usually black or unicolorous, not spotted with red or yellow; second 

 abdominal segment of fomale usually black or the derma not spotted, although 

 the segment is sometimes spotted with two or more pubescent spots. 



This diagnosis limits the genus to those species which have the 

 body clothed with long and dense pubescence. A study of such 

 species as agenor Fox, gihhosa Say, macra Cresson, and many others 

 has convinced the writer that there is no valid basis at present for 

 considering them other than as congeneric with gorgon Blake, the 

 type of DasymutiUa. The same statement holds true for the females 

 quadrignttata Say, Uoculata Cresson, sparsa var. segregata Rohwer, 

 and many others. 



The genus Bruesia was proposed by Ashmead (1903-04) with Mu- 

 tilla hamionm Fox as the type. Ashmead separated this genus from 

 DasymutiUa on account of the subsessile condition of the first ab- 

 dominal segment. The inconsistencies of Ashmead's classification 

 have already been pointed out by Bradley (1916a). The male of 

 havTiionia is unknown, although Ashmead indicated the male char- 

 acters in his diagnosis of the genus. Mutilla harmonia is considered 

 by the writer to belong to the genus DasymutiUa and Bimesia there- 

 fore becomes a synonym of that genus. 



The genus Pycnomutilla was proposed by Ashmead (1903-04) with 

 MutilU waco Blake as type, and was characterized principally by 

 the rudimentary wings of the male. Bradley (1916c) called atten- 

 tion to the fact that waco was not generically different from hexar 

 which would fall in Bruesia. The male of waco was described by 

 Fox (1899) from a unique specimen supposed to have rudimentary 

 wings. I have regarded this specimen as an abnormality, since other 

 specimens with normal wings and identical with Fox's specimen in 

 every other respect were before me for study. Waco, the type of 

 Pycnomutilla^ and harmonia, the type of Bruesia, constituted Fox's 

 group " wacoP It seems to the writer that Pycnomutill-a must be con- 

 sidered strictly as a synonym of Bruesia, and as such also becomes a 

 synonym of DasyTtiutill-a. 



As limited in this paper, the diagnostic characters of the genus 

 DasyTnutilla are as follows: 



Eyes round, prominent, almost hemispherical in shape, polished, the facets 

 usually very indistinct but not necessarily so; first abdominal segment either 

 distinctly petiolate, subpetiolate, or subsessile, but never completely sessile 

 with the second, a distinct constriction present at the junction of these two 

 segments; anterior wings of the male with cells 1st Ri+R, and Rb present, 

 cell Ri either indistinct or completely absent; females with a distinct pygidial 

 area; body either clothed with long dense pubescence, sparsely pubescent or 

 almost bare; pubescence of the body composed entirely of simple hairs; plu- 

 mose hairs never present. 



