236 NORTH AMERICAN BLATTIDAE 



Kits Peak Rincon, Baboquivari Mountains, Ariz., VIII, 7 to 9, 191 6. (Lutz 

 and Rehn). 2 cf , [A. M. N. H. and A. N. S. P.]. 



Santa Cruz Village, Comobabi Mountains, Ariz., VIII, 10 to 12, 191 6, (Lutz 

 and Rehn). i cf . [A. M. N. H.]. 



Prescott, Ariz., VI, 10, 1902, (E. J. Oslar), 2 cT, type, paratype, [A. N. S. P.]. 



Florence, Ariz.. VI, 8, 1903, (C. R. Biedennan), i juv. d' ; VII, 17 to 22. 1903, 

 (C. R. Biederman), 11 &, [A. N. S. P.]. 



Phoenix, Ariz., VI, 17, 1892, (A. B. Cordley), i d'; VIII, 1890. i juv. cT ; IX, 14 

 to X, 9, 1903 and 1904, (R. E. Kunze), 7 o", [Hebard Cln. and A. N. S. P.]. 



Fort Mojave, Ariz., Ill, 25, 191 1, i d", [Hebard Cln.]. 



Yuma, Ariz., VII, 27, 1907, (Rehn and Hebard; at light), i o"". [Hebard Cln.]. 



St. George, Utah, 1875, (E. Palmer), 49,1 juv. o\ i juv. 9. [M. C. Z. and 

 Hebard Cln.]. 



Cottonwood, California, 2274 feet, IX, 9, 1907, (Hebard; at light on train), 

 I cf, [Hebard Cln.]. 



Riverside, Cal., (H. Wickham), i 9, [Hebard Cln.]. 



Sonora, Mexico, i cf , [Hebard Cln.]. 



Arenivaga apacha (Saussure) (Plate IX, figures 14 to 16.) 



1893. [Homoeogamia] apacha Saussure, Rev. Suisse Zool., i, fasc. 2, p. 296. [cf; 



Chihuahua, Mexico.] 

 1905. [Homoeogamia] apacha infuscatu Caudell. Proc. U. S. Nat. Mus., xxviii, pp. 



462 to 463. [cf ; Phoenix, Arizona.] 



Comparison of this species with its nearest ally, A. erratica, is 

 made under that species. 



Normally the shield-shaped dark blotch of the pronotum in males 

 of this species is sharply defined, with darker markings decided, 

 strongly pictured; however, very great color variation is shown, 

 specimens of maximum recession being paler than the normal con- 

 dition of erratica, with shield-shaped blotch greatly reduced and 

 no darker markings. A number of specimens of the maximum 

 intensive coloration have all but the cephalic margin of the pro- 

 notum very dark brown, the tegmina, excepting the pale marginal 

 field, being of the same shade, with a few dots of the paler color. 

 This condition has been named injuscata; as it merely indicates 

 a certain degree of color variation, we place the name in synonymy. 

 In addition to the characters given in the key, the following 

 features are of diagnostic value in the male. Though the width 

 between the eyes is normally subequal to that between the ocelli, 

 several specimens before us have this dimension appreciably less. 

 Concealed genital hook and dcxtro-dorsal genital plate as in crrat- 



