BIRDS OF NORTH AND MIDDLE AMERICA 247 



DENDRORTYX MACROURA STRIATUS Nelson 



Guerrero Long-tailed Partridge 



Adult. — Similar to that of the nominate race but with the crest feathers 

 more extensively black, only narrowly tipped with hazel, the back and 

 rump more olive brownish, less gray-brown, and with little or no trans- 

 verse whitish and .blackish flecking; the hazel shaft stripes longer and 

 more pronounced on the feathers of the sides and extending posteriorly 

 to include the feathers of flanks. This is the most variable of all the 

 forms of the species (possibly it only seems so because of the far more 

 extensive material of it available) ; thus two males from the same place 

 and date present the two extremes. In one the sides and flanks and 

 lower abdomen are pale buffy brown, in the other dark olive-brown ; 

 in the former the middle of the abdomen is very pale light drab, in the 

 latter hair brown to pale olive-brown; in the former the lateral portions 

 of the brea«t feathers are very pale light drab with a grayish tinge, in 

 the latter light mouse gray; "bill and feet bright yellowish scarlet" 

 (Goodknight). 



Natal dozvn. — Broad forehead and superciliaries chamois darkening to 

 honey yellow over the eyes ; middle of crown, occiput and nape auburn ; 

 entire upperparts of body and wings Brussels brown, obscurely banded 

 on the dorsolateral portions of the body with dusky clove brown ; chin, 

 throat, and underpart of the body cream bufif, brightest on the chin and 

 throat and becoming tinged with tawny-olive on the sides and flanks 

 which merge into the Brussels brown of the back; thighs pale Brussels 

 brown; bill and feet yellowish (^in dried skins). 



Adult male.— Wing 143-167 (154.7); tail 132-175 (147.1); culmen 

 from base 18.7-22.4 (20.8) ; tarsus 45.3-52 (49.5) ; middle toe without 

 claw 37.4-43 (40.1 mm.).''^ 



Adult female— Wing 147-159 (151.6) ; tail 131-146 (138.3) ; culmen 

 from the base 19.5-21.7 (20.8) ; tarsus 46.3-50 (48.5) ; middle toe with- 

 out claw 37.6-39.5 (38.4 mm.).^^ 



Range. — Resident in the highland forests of the southern part of the 

 State of Jalisco (Sierra Nevada de Colima, Talpa, Los Masos) to Micho- 

 acan (Sierra Madre, Mount Tancitaro, Patzcuaro, Patamban) and the 

 Cordillera of Guerrero above 8,000 feet (Omilteme, Chilpancingo). 



Type locality. — Chilpancingo, Guerrero, Mexico. 



Dendrortyx macrourus (not Ortyx macroura Jardine and Selby) Ogilvie- Grant, 

 Cat. Birds Brit. Mus., xxii, 1893, 392, part (Guerrero). 



Dendrortyx macrorus Ogilvie-Grant, Handb. Game Birds, ii, 1897, 112, part (high- 

 lands of Guerrero). 



' Twenty-one specimens from Guerrero and Michoacan. 

 ' Twelve specimens from Guerrero and Michoacan. 



