MORGAN HEBARD 213 



No additional material of this species has Ijeen received since 

 our monographic study, the ninety-four specimens there recorded 

 as erratka, from east of the Pecos River in Texas, being wholly 

 referable to the present species. 



Arenivaga apacha (Saussure) (Plate VII, figures 10, 11 and 15) 

 1893. [Hoinoeogamia] apacha Saussure, Rev. Suisse Zool., i, fase. 2, p. 296. 



[cf; Chihuahua, Mexico.] 

 1905. [Homoi'ogamia] apacha infuscata Caudell, Proo. U. S. Nat. Mus., 



xxviii, p. 4G2. [d^; Phoenix, Arizona.] 

 1917. Arenivaga apacha Hebard, (in part), Mem. Am. Ent. Soc, 2, p. 23(3, 

 pi. ix, fig. 16. [cf , 9 ; Huaehuoa, Oracle, Tucson, Santa Rita Mountains, 

 Coyote Mountains, Kits Peak Rincon in Baboquivari Mountains, Syca- 

 more Canyon in Baboquivari Mountains, Ehrenberg, Arizona; Death 

 Valley, Monterey, Kern County, Lancaster, Mount Wilson, Claremont, 

 Salton, California; La Sierra de San Francisco, Sonoita, Sonora, Mexico.] 



We have noted above the material which we believe to have 

 been correctly recorded as this species in our monograph. Under 

 apacha we confused the subsequently described species genitalis, 

 as well as three specimens of erratica. 



We are unable to determine whether any of the females here 

 assigned should be referred to genitalis, the female sex of that 

 species apparently being unknown. 



We are fully as confident as before that Caudell's varietal 

 name infuscata is valueless. That author has recently stated 

 that "in infuscata the character, in addition to the blackish 

 general coloration, pointing to at least incipient specific distinc- 

 tion, is the spine of the inferior dextral plate of the concealed 

 genitalia of the male, which is scarcely more than one-half as 

 long as usual in apacha.''-" We have examined the series in 

 the Philadelphia Collections, which includes five specimens of 

 the maximum intensive coloration, two are slightly paler but 

 very dark, seven are dark, about as dark as is normal in genitalis, 

 while three are pale, quite as pale as normal in erratica. We 

 find the length of the spine in question to be individually variable, 

 irrespective of the coloration of the insect. The form of the 

 concealed male genital plates also varies individually to some 

 extent (see plate VII, figures 10 and 11). 



In addition to the previously recorded material, we now have 

 before us the following specimens. 



2'Proc. Ent. Soc. Washington, xx, p. 157, (1918). 



TRANS. AM. ENT. SOC, XLVI. 



