INVESTIGATIONS ON THE MUTILLID WASPS 171 



This species is closely related to quadriguttata Say but is distinctly 

 different and easily separated from the fact that the pubescence and 

 apical fringes of the first, second, and third tergites are black. In 

 quadriguttata the apical fringes of the first, second, and third 

 tergites are pale silvery in color. The paratypes vary in length 

 from 8-12 mm. 



57. DASYMUTILLA BIGUTTATA (Cockerell) 



fMutilla vagans Fabeicius, Ent. Syst. Suppl., p. 282, 1798, female. 

 Sphaerophthalma quadriguttata var. iiguttata Cockeeell, Ent. News, vol. 



6, p. 63, 1895, female. 

 Mutilla quadriguttata var. Uguttata Dalle Toeee, Cat. Hymen., vol. 8, p. 

 76, 1897, female. — Fox, Trans. Amer. Ent. Soc, vol. 25, p. 239, 1899, 

 female. 

 Ephuta (Ephuta) quadriguttata var. higuttata ANDsi:, Gen. Ins., vol. 1, 

 fasc. 11, p. 63, 1903, female. 

 Type.— Femsile, Cat. No. 40731, U.S.N.M., Columbus, Texas (Wick- 

 ham). 



Distribution. — Mississippi, Texas, Kansas, and Arizona. 



SPECIMENS EXAMINED 



Arizona : Female, Fort Apache, Arizona, August 26. 1897. 



Kansas: Female, Riley County, August 2 (G. A. Dean) ; female, Medora, Sep- 

 tember 21, 1912 (W. Knaus). 



Mississippi: Female, Starkville, summer, 1915 (H. F. Wallace). 



Texas: Female, Rock Island, August 5, 1922 (Grace O. Wiley) ; female. Rock 

 Island, August IS, 1922 (Grace O. Wiley) ; female, Beaumont, August, 1918 

 (G. E.Riley). 



The description of this species is as follows : 



Female. — Head and thorax red, abdomen black, the second tergite 

 with a pair of pale yellow spots on the apical half. Length, 8.5 mm. 



Head, red, sparsely clothed with short, recumbent, golden hairs, 

 and a few scattered erect hairs; mandibles unidentate at the apex 

 and with a single tooth within ; cephalic face of clypeus transversely 

 concave, glabrous, the posterior half finely and very closely 

 punctured; scape with moderate, separated punctures; first segment 

 of flagellum short, one and one-half times as long as it is broad at the 

 apex ; antennal scrobes not carinate above ; front coarsely, confluently 

 punctate ; vertex and genae closely punctate, not as coarsely punctate 

 as the front; posterior margin of the head with a pair of very 

 prominent elongate tubercles, the distance between the tubercles about 

 equal to the distance between the inner margin of the eyes; relative 

 widths of head and thorax 5.5-5.5. 



Thorax red, clothed above with sparse, recumbent, golden hairs; 

 dorsum of thorax coarsely, confluently punctured; cephalic face of 



