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BULLETIN" 143, UNITED STATES NATIONAL MUSEUM 



Iowa: 2 males, Sioux City, July 8, 1921 (C. N. Ainslie) ; male, Sioux City, July 

 16, 1921 (C. N. Ainslie) ; male, Sioux City, August 10, 1917 (C. N. Ainslie). 



Kansas: Male, Wellsville, July 23, 1901; 2 males, Riley County, August 7, 

 (F. Marlatt) ; male, Riley County, August 18 (G. A. Dean) ; male, Mead 

 County, July 10, 1911 (F. X. Williams) ; male, Seward County, August 18, 

 1911 (F. X. Williams) ; male, Finney County, June, 1895 (H. W. Menke) ; 

 male, Sherman County (F. X. Williams) ; male, Decatur County (F. X. 

 Williams) ; 3 males, Rawlins County (F. X. Williams) ; male, Cheyenne 

 County (F. X. Williams) ; male, (T. B. A.). 



MissouBi: Male, Hollister, August 12, 1912 (H. H. Knight) ; male, August. 



Ne3jraska: 2 males, Omaha, July 14. 1914 (L. T. Williams) ; male, LouisviUe, 

 July 29, 1914 (H. A. Jones) ; 2 males, Lincoln, July; male, Haigler, August 

 19, 1909 (C. H. Gable) ; male, Mitchell, August 4, 1916 (C. E. Mickel) ; male, 

 Mitchell, August 5, 1914 (L. M. Gates) ; male, Mitchell, August 16, 1915 (B. 

 M. Partridge) ; male, Mitchell, September 16, 1915 (E. M. Partridge) ; male, 

 Glen, July 12, 1910 (L. Bruner) ; male. Glen, August 9, 1905; male, Mon- 

 roe Canyon, Sioux County, August 16, 1912 (R. W. Dawson) ; male. Bad 

 Lands, Sioux County, August 10, 1908 (L. Bruner) ; male. Pine Ridge, July. 



New Mexico: Male, Chaves; male, Cont. D. Ten-?, August 2. 



Pig. 7. — Distribution of Dastmutilla macba (Ceesson) 



NosTH Dakota: Male, northeast North Dakota (C. N. Ainslie); male. Can- 

 non Ball, August 20, 1922 (O. A. Stevens) ; male, Medora, August 3, 1923 

 (O. A. Stevens). 



South Dakota: Male, Capa, August 18, 1921 (H. C. Severin). 



Texas: Male, Dallas, October 3, 1905 (F. C. Bishopp) ; male, Farmersville, July 

 13, 1905 (F. C. Bishopp). 



Wyoming : 2 males, 30 miles north of Lusk, July, 1895. 



This species has been confused with sparsa Fox until recent years. 

 It may be distinguished from the latter by the fact that in sparsa 

 the second abdominal sternite is ferruginous, while in macra the sec- 

 ond abdominal sternite varies in color from dark mahogany red to 

 black. The validity of this criterion for the identification of the two 

 species is confirmed by an examination of the genitalia of a large 



