142 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



The specimens in the above series vary in length from 7.5 mm, to 

 15 mm. The color of the pubescence varies from pale yellow to fer- 

 ruginous. The pubescent markings of the abdominal tergites also 

 show considerable variation. In typical specimens the ferruginous 

 pubescence of the second tergite extends to the apical margin and 

 the apical fringe is concolorous with it, the former being slightly 

 interrupted medially by an obscure spot of black pubescence, and the 

 third tergite has the disk fairly well clothed with ferruginous pubes- 

 cence, the remaining tergites clothed with black pubescence. In other 

 specimens, however, the apical fringe of the second tergite is either 

 entirely or mostly black, and the third segment is entirely clothed 

 with black pubescence, Man}^ intergrades are present in the series 

 and the writer has considered all of these as individual variants of a 

 single species. 



41. DASYMUTILLA CREUSA var, BELLONA (Cresson) 



Mutilla iellona Cresson, Proc. Phila. Eiit. Soc, vol. 4, p. 434, 1865, female, — 



Blake, Trans. Amer. Ent. Soc, vol. 7, p. 244, 1879, female. — Dalle Torre, 



Cat. Hymen,, vol. 8, p. 15, 1897, female. 

 Mutilla (Splmcrophthalma) bellona Blake, Trans. Amer. Ent. Soc, vol, 3, p, 



235, 1871, female, 

 Sphaerophtlialma Itellona. Blake, Trans. Amer. Ent. Soc, vol. 7, p, 244, 



1886, female. 

 Mutilla creusa Fox, Trans. Amer. Ent. Soc, vol, 25, p, 239, 1899, female 



(in part). 



Type. — Female; Colorado Territory, in collection of American 

 Entomological Society of Philadelphia. 



Distribution. — Arkansas, Kansas, Nebraska, Colorado, and 

 Wyoming. 



SPECIMENS EXAMINED 



Arkansas : Female, Pine Bluff, September, 1890, 



Colorado : Female, Fort Collins, August 24, 1899 ; female, Fort Collins ; female, 



Greeley, September 17, 1898. 

 Kansas: Female, Riley County, September 1 (Popenoe) ; female, Rooks County, 



August 9, 1912 (F, X, Williams) ; female, Mitchell County, August 25; 



female, Wallace County, July 7. 

 Nebraska: Female, McCouk, July, 1908 (M. H. Swenk) ; female, Curtis, July 



25, 1917 (C. E. Mickel) ; female, Mitchell, .Tuly 25, 1916 (C, E, Mickel) ; 



female, Harrison, August 12, 1912 (R. W. Dawson) ; female, Harrison, 



August 15, 1908 (C. H. Gable). 

 Wyoming: Female, Douglas (L. Bruner), 



This variety is identical with creusa with the exception that the 

 narrow lateral margins of abdominal tergites 3-5 and the abdominal 

 sternites entirely are clothed with pale silvery pubescence. 



