390 PROCEEDINGS OF THE ACADEMY OF [July, 



The specimens recorded by Snow^ from Oak Creek Canyon and 

 Humphreys Peak, Coconino County, Arizona, as this species prove, 

 on examination of individuals forwarded by Prof. Snow, to be T. 

 alliciens Scudder. The two forms, however, are very closely related. 

 Trimerotropis modesta Bruner. 



A female of this form taken on the rim of the Grand Canyon, near 

 Bright Angel, September 11, and a male taken at Williams, September 

 13, are in the collection. The specific validity of this form appears to 

 be rather questionable, as its relationship to T. citrina is so close that 

 it may be nothing more than a race of that species. 



Trimerotropis strenua McNeill. 



Two specimens of this species were taken at Tucson, July 26, at light. 

 When compared with Salt Lake Valley specimens they are seen to be 

 inseparable. Snow has recorded this species from San Bernardino 

 Ranch, Cochise County, Arizona. 

 Trimerotropis inconspioua Bruner. 



Three males of this species taken at Bright Angel, Grand Canyon, 

 6,880 feet to 7,000 feet, are before us. Two were taken July 29 to 

 August 2, 1906, by Calvert, and one on September 11, 1907, by Hebard. 

 Two specimens are identical in coloration with the tegminal bars decid- 

 edly blackish and strongly contrasting with the pale ochraceous base 

 color, while the other specimen is decidedly reddish, both bars and 

 base color. 



This species was described by Bruner from material taken at a 

 number of localities in the Grand River region of western Colorado, 

 this being the first record of the species from any locality outside of 

 that State. 



The specimen taken on September 11 was the only individual of the 

 species noticed and was captured in the forest of piiion and juniper. 

 Trimerotropis vinculata Scudder. 



This wide ranging species is represented by eighty-three specimens 

 taken as follows: Tucson, July 26, 27 d^, 18 ? ; Sonora Road Canyon, 

 July 25, 4 cJ*; Sonora Road near Tucson Mountains, July 25, 2 9 ; 

 Roeble's Ranch, July 24 and 25, 13 d', 4 9 ; Nogales, August 13 (at 

 light, Calvert), 1 d ; Yuma, July 28, 1 d" ; WiUiams, September 13, 1 6" ; 

 Bright Angel Trail, Grand Canyon, elevation 3,000-7,000 feet, July 29- 

 August 2 (Calvert), September 11 and 12 (Hebard), 3 c?, 9 9 . 



The specimens of the series present a considerable amount of varia- 



' Trans. Kansas Acad. Sci., XX, pt. 2, p. 37. 



