INVESTIGATIONS ON THE MUTILLID WASPS 291 



irregularly reticulate; dorsum and posterior face of propodeum 

 deeply, irregularly reticulate; tegulae shining, impunctate. 



Abdomen red; first segment very dark red, almost black, very 

 closely and confiuently punctate above, sparsely clothed with long, 

 black, erect pubescence; second tergite very dark red on the basal 

 and lateral margins, orange red on the disk; closely, confiuently 

 punctate on the basal and lateral margins, with distinct, separated 

 punctures on the disk, clothed with long, erect fulvous pubescence 

 on the apical four-fifths, that on the basal fifth black; tergites 3-6 

 orange red, with distinct separate punctures, and long, erect, fulvous 

 pubescence; seventh tergite bare, with a raised median ridge, ob- 

 scurely, irregularly, longitudinally rugose ; second sternite very dark 

 red, almost black, with large, separated punctures, except for a small 

 median area which is finely, closely punctate, each puncture bearing a 

 fine hair; sternites 3-6 orange red, irregularly punctate, with an 

 apical fringe of fulvous hairs. 



Legs black, sparsely clothed with black hairs. 



Wings dark fuliginous; cell 2nd R^ + Ra broadly truncate at the 

 apex; cell R^ less distinct than other cells of the wing; vein M3+4 

 received by cell R5 at one-third the distance between the base and 

 apex of the latter, veins r-m and R5 approximate on vein r. 



Holotype. — Male, Dragoon, Cochise County, Arizona, July 20, 

 1917 (J. Bequaert), in collection of University of Minnesota 



PARATTPB MATERIAL 



Seven males. Dragoon, Cochise County, Arizona, July 20, 1917 

 (J. Bequaert) ; 2 males, Douglas, Arizona, August (F. H. Snow) ; 

 male, Nogales, Arizona, June 27, 1903 (Oslar) ; male, Nogales, Ari- 

 zona, July 8, 1903 (Oslar) ; male, Nogales, Arizona, July 20, 1903 

 (Oslar) ; 2 males, Nogales, Arizona, July 23, 1903 (Oslar) ; male, 

 Nogales, Arizona, July 30, 1903 (Oslar) ; 3 males, Nogales, Arizona, 

 July 31, 1903 (Oslar) ; 3 males, Baboquivaria Mountains, Arizona 

 (F. H. Snow) ; male, Sabino Canyon, St. Catalina Mountains, Ari- 

 zona, July 8-20, 1916; male, Empire Mountains, Arizona, July 3, 

 1924 (A. A. Nichol) ; 2 males. Fort Grant, Pinaleno Mountains, Ari- 

 zona, July 18, 1917; 2 males. Steins, Grant County, New Mexico, 

 July 14, 1917 (J. Bequaert) ; male. Fort Grant, Pinaleno Mountains, 

 Arizona, July 19, 1917 ; 2 males, Texas Pass, Arizona, July 19, 1917 ; 

 male, Texas Pass, Arizona, July 20, 1917; male, southern Arizona. 

 Paratypes in collections of University of Minnesota, United States 

 National Museum, American Museum of Natural History, Cornell 

 University, University of Kansas, J. Bequaert, and the author. 



The median area of fine punctures on the second sternite dis- 

 tinguishes atrifulva from species of a similar appearance. 



