BIRDS OF NORTH AND MIDDLE AMERICA. 51 



a. Black bars on upper parts much narrower, the lighter areas 

 mostly buff-yellowish; no trace of black streaks on eupra- 

 postocular region; adult male averaging: wing 127.8, tail 87, 

 culmen 33.6, tarsus 23.5, outer anterior toe 20.2; adult female 

 averaging: wing 123.8, tail 85.8,' culmen 30.4, tarsus 22.3, outer 

 anterior toe 19.2. (Island of Grand Cayman, south of Cuba.) 



Centurus caymanensis (p. 65). 

 ff. Middle rec trices with little (mostly concealed) white or none; inner web 

 of primaries regularly barred with white basally. (Centurus dubius.) 

 g. White bars on back, etc., much narrower than black interspaces; outer 

 webs of primaries without distinct if any white markings on basal 

 portion; smaller (adult female with wing averaging less than 

 128 mm.). 

 h. Coloration much lighter, the general color of under parts pale yel- 

 lowish gray (dull whitish in faded specimens), the rump and 

 upper tail-coverts immaculate white, the adult male with white 

 frontal band broader. 

 i. Averaging slightly larger (wing averaging 133.3 in adult male, 

 127.2 in adult female); white bars on back, etc., narrower (or 

 black bars relatively broader), general color of under parts paler 

 and less yellowish, red of abdomen deeper and more extended, 

 and middle rectrices always (?) wholly black. (Yucatan, Cam- 

 peche, and British Honduras.) 



Centurus dubius dubius (p. 66). 

 ii. Averaging slightly smaller (wing averaging 126.9 in adult male, 

 124.7 in adult female); white bars on back, etc., wider (or black 

 bars relatively narrower); general color of under parts darker 

 and more yellowish; red of abdomen paler and more restricted 

 (frequently tinged with orange), and adult female sometimes 

 with inner web of middle rectrices marked with white on basal 

 portion. (Vera Cruz, eastern Oaxaca, Tabasco, Chiapas, and 



Guatemala.a) Centurus dubius veraecrucis (p. 68). 



hh. Coloration much darker, the general color of under parts yellowish 

 broccoli brown (in uufaded specimens), the rimip and upper 

 tail-coverts more or less (often heavily) barred with black, the 

 adult male with white frontal band narrower (sometimes obso- 

 lete). (Island of Cozumel, Yucatan.) 



Centurus dubius leei (p. 69). 



gg. WTiite bars on back, etc., nearly as wide as the black interspaces; 



outer webs of primaries (except three outermost) spotted or barred 



with white on basal portion; larger (adult female with wing 



averaging 130.3 mm.). (Island of Ruatan, Honduras.) 



Centurus dubius canescens (p. 70). 

 ee. Prefrontal region yellow; smaller (wing 95-119.5). 

 /. Back, etc., more narrowly barred (white bars about 1-1.5 mm. wide); 

 lateral rectrices without whitish bars; tail longer (57.5-69 mm.). 

 {Centurus ruhriventris.) 

 g. Larger and paler, and with less white on middle rectrices; adult 

 male usually with red of crown more extensive and broadly con- 

 fluent with that on nape; adult male averaging: wing 107, tail 63, 

 culmen 21.6; adult female averaging: wing 105.5, tail 62.3, culmen 

 19.1. (Yucatan.) Centurus ruhriventris rubriventris (p. 70). 



f Typical specimens from Vera Cruz and Oaxaca only. 



