78 BULLETIN- 143, UNITED STATES NATIONAL MUSEUM 



Eolotype.—F^m^lQ, Oak Creek Canon, Arizona, August (F. H. 

 Snow), in collection of University of Kansas. 



Paratyqjes.—Tyfo females. Oak Creek Canon, Arizona, August (F. 

 H. Snow), 4 females, southern Arizona, August, 1902 (F. H. Snow), 

 in collections of the University of Kansas, the University of 

 Minnesota, and the author. 



Superficially this species resembles tlie female of fulvohirtai; how- 

 ever, the sculpturing of the genae is very much coarser than in that 

 species, and the genae are bounded posteriorly by a carina; the 

 sculpturing of the dorsal surface of the thorax and abdomen is also 

 much coarser than in fulvohirta^ and the color of the integument 

 above is reddish testaceous, while the pubescence above is uniformly 

 of a brilliant crimson color. 



Group THETIS 



Including a single species, female, in which the thorax is sub- 

 hexagonal, broader than long, and with scutellar scale absent; 

 pygidium striate. 



14. DASYMUTILLA THETIS (Blake) 



Sphaerophthalma thetis Blake, Trans. Amer. Ent. Soc, vol. 13, p. 214, 



1886, female. 

 Mutilla thetis Dalle Torre, Cat. Hymen., vol. 8, p. 91, 1897, female.— Fox, 



Trans. Amer. Ent. Soc, vol. 25, p. 246, 1899, female. 

 Ephuta (Ephuta) thetis Andre, Gen. Ins., vol. 1, fasc. 11, p. 64, 1903, 

 female. 

 Type. — Female, Arizona, in collection of Entomological Society of 

 Philadelphia. 



Distribution. — Arizona. 



SPECIMENS EXAMINED 



Arizona: Female, Florence (Biederman) ; female, Sacaton, July 26, 1924 (J. A. 

 Harris, Jr.) ; female, Nogales, June 21, 1903 (Oslar) ; female, Nogales, 

 June 25, 1903 (Oslar) ; female, Baboquivaria Mountains (F. H. Snow). 



The following characters were not mentioned in the original 

 description ; no carina between the antenna! tubercles and the margins 

 of the eyes; genae rounded posteriorly; thorax not longer than 

 broad ; scutellar scale absent ; a very few scattered black hairs at the 

 median apical margin of the first abdominal tergite, and the median 

 basal margin of the second abdominal tergite (these are so incon- 

 spicuous that I have regarded this species as " entirely clothed with 

 white hairs " in the key) ; pygidium very distinctly longitudinalUy 

 striate. Thetis is very similar in general appearance to gloriosa but 

 is easily distinguished from the latter by the characters mentioned 

 above. 



