408 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



PIPILO TORQUATUS ALTICOLA ( Salvin and Godman). 

 JALISCAN COLLARED TOWHEE. 



Similar to P. t. torquatus but white superciliaiy stripe obsolete or 

 restricted to a very narrow line, no white median streak on forehead, 

 black jugular collar broader, sides of breast more l)rowni.sh gray, 

 flanks browner, and olive-green of back and rump tinged with l)rown; 

 wings and tail longer, tarsi shorter, and bill slightly shorter and rela- 

 tively deeper at base. 



Adult male.— Iji^n^th (skins), 210.06-213.87 (212.09); wing, 88. SO- 

 SO. 41 (88.90); tail, 99.57-104.39 (102.11): exposed culmen, 1.5.49-16.51 

 (16.00); tarsus, 30.23-32.00 (31.24); middle toe, 21.08-22.35 (21.59); 

 hind claw, 12.70-13.72 (13.21).! 



Adult female.— IjQngth. (skins), 200.66-218.69 (206.50); wing, 85.09- 

 91.95 (87.38); tail, 96.01-103.63 (98.5.5); exposed culmen, 14.99-16.51 

 (16.00); tarsus, 28.96-30.48 (29.72); middle toe, 19.81-20.57 (20.07); 

 hind claw, 11.94-12.70 (12.45). ^ 



Mountains of southwestern Mexico, in the States of Colima (Sierra 

 Nevada) and Jalisco (Sierra Madre, La Laguna, etc.). 



Chamasospiza alticola Salvix and Godmax, Ibis, 6th ser., i, July, 1889, 381 

 (Sierra Nevada de Colima; coll. Salvin and Godman). 



PIPILO NIGRESCENS (Salvin and Godman). 

 PATZCUARO TOWHEE. 



Similar to P. macronyx virescens but occiput with more or less of a 

 cmnamon-rufous patch; sides and flanks dull grayish brown, olive, or 

 Isabella color (instead of cinnamon-rufous), and outermost rectrices 

 without trace of lighter terminal spots on inner webs." 



Adult imde.— Length, (skins), 196.85-216.15 (206.50); wing, 87.38- 



' Four specimens. 



- Three of the four adult specimens examined have a more or less extensive white 

 throat-patch, just as in some examples of P. macronyx and P. m. virescens; one of 

 them has the rufous occipital patch so small as to render it exceedingly probabie 

 that in a large series some specimens would be without it altogether. An example 

 of P. m. virescens in the National Museum collection (unfortunately without locality) 

 has the occiput distinctly tinged with rufous, the centers of the feathers l^eing of this 

 color; this rufous occipital patch is sometimes combined with a white throat-patch, 

 also in P. p. macronyx. The differential characters of P. nigresceus therefore consist 

 really only in the different color of the sides and flanks, which, instead of being cin- 

 namon-rufous or more or less cinnamomeous, are olivaceous anteriorly (sometimes 

 grayish next to black of chest, becoming more decidedly olive, huffy brown, or 

 Isabella color on the flanks), and in the aljsence of any lighter colored terminal 

 areas on inner webs of lateral rectrices. Between the more buffy sided examples of 

 P. nigrescens and the browner sided specimens of P. »i. rirescens there is not, however, 

 any very great difference, and I strongly suspect that l;)oth P. macronyx and P. m. 

 virescens hybridize with P. torquatus and P. t. aJticohi, these intermediate specimens 

 being the result. In other M'ords, the present form may be nothing more than a 

 series of hybrids between P. 1. alticola and P. m. rirescens, those examples of P. 

 m. macronyx having a white throat and rufous occipital patch being hybrids between 

 the latter form and P. t. torquatus. 



