208 GENUS ARENIVAGA (bLATTIDAe) 



Arenivaga erratica Rehn (Plate VII, figures 6, 7 and 14) 



1903. Ilouiocngamia {Arenivaga) erratica Rehn, Proc. Acad. Nat. Sci. Phila., 

 1903, p. 1S7. [cT; Prescott, Arizona.] 



1917. Arenivaga erratica Hebard, (in part),''' Mem. Am. Ent. Soc, 2, p. 231, 

 pi. ix, figs. 11 and 12. [cf, 9 ; Hackberry Creek in Brewster County, 

 Chisos Mountains, El Paso, Texas; Durango, Colorado; Mescalero Apache 

 Reservation, Highrolls in Sacramento Mountains, Jemez Hot Springs, 

 Albuquerque, Las Cruces, Deming, New Mexico; Adamana, Winslow, 

 Fort Grant, San Simon, Paradise, Chiricahua Mountains, Roosevelt, 

 Redington, Sheridan Canyon in Huachuca Mountains, Lowell Ranger 

 Station in Pima County, Sabino Basin in Santa Catalina Mountains, 

 Sabino Canyon in Santa Catalina Mountains, Tucson, San Xavier, Snyder's 

 Hill in Pima County, Roebles Ranch in Pima County, Palo Alto Ranch 

 in Pima County, Coyote Mountains, Kits Peak Rincon in Baboquivari 

 Mountains, Santa Cruz Village in Cobabi Mountains, Prescott, Florence, 

 Phoenix, Fort Mojave, Yuma, Arizona; St. George, Utah; Cottonwood in 

 San Bernardino County, Riverside, California; Sonora, Mexico.] 



1917. Arenivaga apacha Hebard, (in part, not of Saussure, 1893), IVIem. 

 Am. Ent. Soc, 2, p. 236. [cf ; Kern County, Strawberry Valley in San 

 Jacinto Mountains and San Diego, California.]'^ 



This species is apparently the most numerous and has the 

 widest distribution of the forms of the genus found in the United 

 States. 



The following material has been received subsequent to our 

 monographic study: 



Sawmill Canyon, Hualapai Mountains, Arizona, VIII, 30 to IX, 22, 1919, 

 (O. C. Poling), 6 c?, [Hebard Cln.]. 



Topock, Arizona, X, 9, 1917, (O. C. Poling), 4 c?, [Hebard Cln.]. 



Wenden, Yuma County, Arizona, IX, 28, 1913, (Mrs. W. W. Gnash), 

 1 d", [A. M. N. H.]. 



Needles, California, X, 10, 1919, (O. C. Pohng), 1 d", [Hebard Cln.]. 



" The material recorded at that time from east of the Pecos River in Texas 

 we find represents a distinct species, which we describe in the present pai)c'r 

 as tonkawa. The description of the female, as well as the figure given of 

 that sex, apply to that species. 



•■'' The small size, strikingly maculate pronotum and wide intenx'ular 

 space, led us to mistake the San Diegan specimen for apacha, under wliicli 

 species we included material of the then undescribed genitalis, tlie normal 

 type of which species is very similar to the present example in these features. 

 Examination of the concealed genitalia has revealed our mistake. This is 

 an (!X(H'IIeiit illustration of the absolute necessity to examine the concealed 

 genitalia to determine correctly males of these species. After having become 

 familiar with the very large series we had before us, we, at that time de- 

 pending on external characters, felt no uncertainty in making this assign- 

 ment. 



