54 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



hh. Back narrowly barred with white (the bars averaging less, usually 

 much less, than 2 mm. wide); primaries with little if any white 

 on basal portion of outer web; under parts darker (deep olive- 

 drab or yellowish drab) with yellow of abdomen deeper (saffron 

 yellow or orange-yellow); middle rectrices sometimes with white 

 on basal portion of inner web; nape orange-red, in adult male 

 usually confluent with red crown-patch. (Centurus santacruzi.) 

 i. Larger (averaging wing more than 131, tail more than 72, culmen 

 more than 29 in male, wing more than 129, tail more than 72, 

 culmen more than 26, in female). 

 j. Under parts averaging darker, white bars on back, etc., narrower, 

 and forehead less purely white. (Chiapas and Guatemala 

 through Salvador to northern Nicaragua.) 



Centurus santacruzi santacruzi (p. 84). 

 jj. Under parts averaging paler, forehead more purely white, and 

 white bars on back, etc., broader. (Southern Tamaulipas, 

 Puebla, Vera Cruz, and northeastern Oaxaca.) 



Centurus santacruzi grateloupensis (p. 87). 

 a. Smaller (averaging wing 123.7, tail 69.2, culmen 27.4 in male, 

 wing 119.5, tail 66.9, culmen 25.8 in female); in coloration 

 averaging darker than C. s. santacruzi. (Honduras.) 



Centurus santacruzi pauper (p. 88). 

 ee. A large superciliary patch of black; outer (as well as inner) web of middle 

 rectrices broadly barred with white; lateral rectrices barred to base. 

 {Centurus chrysogenys.) 

 f. Nape reddish orange or orange-red. (Sinaloa and Tepic.) 



Centurus chrysogenys chrysogenys (p. 89). 

 ff. Nape orange-yellow (in adult male abruptly contrasted with red of 

 occiput and crown). (Jalisco, Michoacan, Colima, and Guerrero.) 



Centurus chrysogenys flavinuchus (p. 91). 

 cc. Hindneck grayish brown or drab. 

 d. Orbital region partly black; lateral rectrices barred only on distal portion; 

 rump and upper tail-coverts streaked with black; abdomen white. South- 

 ern Mexico, in States of Puebla, Oaxaca, Morelos, and Guerrero.) 



Centurus h3rpopolius (p. 92). 

 dd. Orbital region without any black; lateral rectrices barred to base; rump 

 and upper tail-coverts barred with black; abdomen yellow. (Centurus 

 uropygialis.) 

 e. Larger, with relatively smaller bill; bars on back, etc., averaging broader 

 (white ones about 2-2.5 mm. wide), and bars on rump, upper tail-coverts, 

 and lateral rectrices averaging broader; adult male averaging: wing 

 131.1, tail 81, culmen 30.3, tarsus 22.8, outer anterior toe 19.1; adult 

 female, wing 128, tail 73, culmen 26.4, tarsus 26.4, outer anterior toe 18. 

 (Southeastern California, northern Lower California, Arizona, and west- 

 ern Mexico south to Durango and Jalisco.) 



Centurus uropygialis uropygialis (p. 93). 

 ee. Smaller, with relatively larger bill; bars on back, etc., averaging narrower 

 (white ones about 1.5-2 mm. wide), black bars on rump and upper tail- 

 coverts averaging narrower and more numerous, and bars on tail nar- 

 rower; adult male averaging: wing 127.8, tail 77.9, culmen 29.9, tarsus 

 22.6, outer anterior toe 17.7; adult female, wing 123, tail 73.2, culmen 

 24.9, tarsus 21, outer anterior toe 16.6. (Cape San Lucas district of 



Lower California.) Centurus uropygialis brewsteri (p. 96). 



bb. Rump and upper tail-coverts black, narrowly barred with white. (Jamaica.) 



Centurus radiolatus (p. 97). 

 aa. Lower rump and upper tail-coverts red. (Haiti.) Centurus striatus (p. 98). 



