550 OT^NITFIOLOGV. 



iL't;, 3 Juv.; Caiii!) !•_*, An-ust 1. ISOT. i:;i— LiOA—Gj^— "'g— Ife— i— ^i— '^'o- 

 Same ii'inarks. 



211. S <i(l.: Wi'st Iliiiiibohlt Moiiiitains (Camp 19), October 8, 1S07. i;{— 21— 

 6.i — o/g — 'A— }|— JA— -i- Jj'llj slate black, deeper termiually ; iris, deep cliestiiut; 

 naked eyelids, tarsi and toes, flue pale lilaceousblue. 



357, S ad.; Truckee Reservation, December 18, 1867. 13i— 21— G3_5g— IJi— 

 1 — 5 — 2J. Iris, deep cherry-red. 



363, S ad.; Truckee Reservation, December 19, 1867. 14— 21^7— 53— Ig— 1— 

 5 — 2^. Same remarks. 



374, ^ ad.; Truckee Reservation, December 21, 1867. 133— 21^- 6t_53. Same 

 remarks. 



391, (? ad.; Washoe Valley, January 3, 1868. 13^- 21— 6i|— 5§. Same re- 

 marks. 



39;5, ? ad.; Washoe Valley, January 4, 1868. 123— 20^6|— 5j?g-. 



461, <? ad.; Carson City, March 28,1868. 1.3i— 22— 6i|— 5^. 



462, $ ad.; same locality and date. 13^ — 22 — 6| — 5^. 



481, 9 ad.; same locality, March 30, 1868. 13|— 21i— 6|— Sji. 



736, eggs (5); Truckee Reservation, May 37,1868. Excavation in a small willow, 

 on bank of the river. 



1345, S piv.; Parley's Park, Utah, June 28, 1869. 



1428, ijuv.; Parley's Park, Utah, July 19, 1869. 121—201. Bill, slate-black; 

 iris, bister; tansi and toe.s, light ashy-blue. 



COLAPTES HYBRIDUS.' 



"Hybrid" Flicker. 



CoJnptcs ayre.ni, Audubon, Birds Am., VII, 1843, 348, pi. 494. 

 Colaptes hybridus, Baird, Birds N. Am., 1858, 122; Cat. N. Am. Birds, 1859, 

 No. 98a.— B. B. & R., Hist. N. Am. Birds, II, 1874, 582, pi. Liv, fig. 3. 



List of .specimen.^. 



400, i; Washoe Valley, January 4, 1868. 13— 205— 6f— 5|. 



[GiMieral appearance of typical mexicanu.i, having ashy throat and scarlet 

 '•moustaches," but occiput with a distinct scarlet crescent, and the red of the remiges 

 and rectrices inclining decidedly to orange.] 



' Whether the puzzling specimens included under this name are really hybrids, or 

 whether they are remnants of a generalized form from which two "incipient species" 

 have become differentiated, must long remain an open question. The latter view, how- 

 cvei', seems the more rational ; and it is altogether probable that this " hybrid" series 

 is gradually losing its neutral character, through tlie nearer approach, generation by 

 geiiora;ion, of its members to the ciiaracters of one or the other of the two specialized 

 Inriiis. [I'\)r a full and very sensildi' discussion of this subject, see Coues's Bird,^ of 

 thr Xorlhwcst, pp. 293, 294.] 



