Jan., 1917 THE SUBSPECIES OF HESPERIPHONA VESPER TINA 21 



more yellowish even than in calif omica. Yellow frontal bar of male very nar- 

 row, averaging narrower than in any other form. Color- tone of body of female 

 browner than in any other form, sharply different from the gray cast in vesper- 

 Una and the sooty tone above in brooksi; paler in tone of brown beneath than in 

 calif omica, most nearly as in ivarreni. 



Summer range. — Specimens at hand only from the following places, all prob- 

 ably breeding localities: Mirador and Las Vigas, both not far from Vera Cruz, 

 Mexico ; Huachuca and Chiricahua mountains, Arizona. I am unable to distin- 

 guish the birds of extreme southern Arizona from the Vera Cruz birds. 



Hesperiphona vespertina warreni*, new subspecies 

 Rocky Mountain Evening Grosbeak 



Type. — Male ; no. 1399, Colorado College Mus. ; Bear Creek, near Colorado 

 Springs, Colorado; June 19, 1898; C. E. Aiken. 



Diagnosis. — Bill of moderate degree of thickness, seemingly identical in this 

 respect with calif omica ; therefore much thicker than in montana, and yet unmis- 

 takably slenderer than in vespertina. Color-tone of body of male averaging the 

 same as in calif omica. Frontal yellow bar of male broad, very nearly as broad 

 as in vespertina, therefore decidedly broader than in calif omica. Color-tone of 

 body of female averaging' nearest montana, slightly paler perhaps, therefore not- 

 ably different from the usual case in vespertina; slightly paler about the head 

 than in calif omica, and decidedly paler than in brooksi. 



Summer range. — Southern Rocky Mountain region, at least in Colorado, 

 New Mexico and north-central Arizona. Specimens in the American Museum of 

 Natural History taken by Mearns in the vicinity of Fort Verde, Arizona, belong 

 here, and not to the form represented in the Chiricahua and Huachuca moun- 

 tains, in the same state, these latter being unequivocally montana as here under- 

 stood. 



IMPORTANT LITERATURE RELATING TO SYSTEMATIC STATUS OF WESTERN 



EVENING GROSBEAKS 



Baird, S. F. 



1870. In Cooper's Ornithology of California (Geol. Surv.. Calif.), Land Birds, Volume 

 i, pp. xi+592, numerous figs, in text. 



Technical paragraph (pp. 175-176) setting forth differences between 

 "two strongly marked varieties", but no new name given, both being in- 

 cluded under Hesperiphona vespertina; also two figures (pp. 174, 175), 

 one, small-billed, with "Mexico" printed beneath, these being the same 

 woodcuts as subsequently used in Baird, Brewer and Ridgway, 1874, plate 



XXII. 



Ridgway, R. 



1874. In Baird, Brewer and Ridgway's History of North American Birds. Land 

 Birds, Volume i. Pp. xxviii+596+vi, pis. xxvi, many figs, in text. 



Original designation of "var. montana" (pp. 449, 450), with figure (pi. 

 xxn, fig. 4, the same cut as in Cooper's Ornithology, p. 175) labeled: "Mex., 

 35150". Otherwise no particular specimen mentioned. 

 Mearns, E. A. 



1890. Descriptions of a New Species and Three New Subspecies of Birds from Ari- 

 zona. Auk, vii, pp. 243-251. 



Extended account (pp. 246-249) of "Coccothranstes vespertina mon- 

 tana Ridgway" with full discussion of this form as then understood, "in- 

 habiting Mexico and the southern Rocky Mountain region." A "type" is 

 for the first time specifically mentioned as such and is stated to have come 

 from Cantonment Burgwin, New Mexico. 



Named in recognition of Edward R. Warren's contributions to the ornithology of Colorado. 



