INVESTIGATIO]SrS ON THE MUTILLID WASPS 87 



Allotype.— M2IQ, Tucson, Arizona (F. H. Snow), in collection of 

 University of Kansas. 



SPECIMENS EXAMINED 



Arizona: Female, 33 males, Tucson (F. H. Snow) ; 2 females, Tucson, June 5, 

 1919; female, Tucson, June 7, 1924 (A. A. Nichol) ; female, Tucson, June 28, 

 1924 (A. A. Nichol) ; 3 females, Sabino Canyon, Santa Catalina Mountains, 

 May 2, 1919; female, Sierrita Mountains, July 10, 1924 (A. A. Nichol); 

 female, Santa Rita Mountains, June (F. H. Snow) ; male, San Xavier near 

 Tucson, July 24, 1916 ; female, Kits Peak, Baboquivaria Mountains, August 

 1-4, 1916; female, Oracle, June 11, 1903 (Oslar) ; female, Catal Springs, 

 July 5 (B. A. Schwarz). 



This species is very closely related to foxi Cockerell. The female 

 does not differ structurally from the female of foxi but is larger in 

 size and has the pubescence above whitish instead of scarlet. The 

 genitalia of the male of foxi are exactly like those of this species ex- 

 cept in size, and the form of the posterior tibiae are the same in the 

 two species. In the male of phoenix the pubescence of the mesono- 

 tum is almost always black and that of the head and thorax griseous, 

 while in foxi the pubescence of these parts is scarlet or fulvous ; one 

 male specimen of phoenix has the pubescence of the mesonotum gris- 

 eous, like the pronotum and scutellum. 



There is no biological basis for uniting this female and male as the 

 same species, but I have done so for the following reasons: The 

 females of foxi and phoenix are very closely related, the only differ- 

 ences being in size and color of pubescence ; the male of foxi and the 

 male described above are also very closely related; the genitalia of 

 the two are the same except in size, and the form of the posterior 

 tibiae is exactly the same in both; the form of the posterior tibiae 

 is very remarkable and is not foimd in other DasymutUIa males. 

 The male and female of foxi are already known ; since the females of 

 foxi and phoenix are so nearly related, it seems logical to assume that 

 a male as closely related to foxi as the one described above probably 

 is the male of phoenix, and I have chosen to regard it in this light 

 rather than to describe it as a new species. 



20. DASYMUTILLA DUGESII (Cockerell and Casad) 



Sphaerophthalma dugcsii Cockerell and Casad, Ent. News, vol. 5, p. 294, 



1894, female. — Cambiion, Biol. Centr.-Amer., Hymen., vol. 2, p. 365, 1895, 



female. 

 Mtitilla dtigesii Dalle Torre, Cat. Hymen., vol. 8, p. 33. 1897. female. — Fox, 



Trans. Amer. Ent. Soc, vol. 25, p. 247, 1899, female. 

 Ephuta (Ephuta) dugesi Andr6, Gen. Ins., vol. 1, fasc. 11, p. 59, 1903, 



female. 



Type. — Female, Guanajuato, Mexico (Dr. A. Duges). Location of 

 type specimen not known. 



Distribution. — Colorado, Texas, Mexico. 

 55287—28 7 



