ART. 7 REVISION OF THE GENUS BASILEUTERUS TODD 71 



SuhspecifiG characters. — Similar to Basileutems auricapillus auri- 

 capillus, but upper parts duller and darker green, near olive citrine. 



Measureme}ifs.—Ma\e : Wing, 57-65 (average, 61) ; tail, 52-56 (54) ; 

 bill, 9.5-10.5 (10); tarsus, 18.5-20 (19.3). Female: Wing, 55-60 

 (57.5) ; tail, 50-53 (51.5) ; bill, 10-10.5 (10.2) ; tarsus, 18-19.5 (18.5). 



/?«;i^^.— Colombia and Venezuela, east of the Andes, to British 

 Guiana, and north to Cumana and Trinidad. 



Remarks.— In 1885 Sharpe called attention to the peculiarities of 

 northern examples of this species, and some years later Doctor Chap- 

 man ventured to give a name to the bird of Trinidad. He compared 

 it with " mainland " specimens, but whether he meant the mainland 

 of Venezuela he does not say. Our series from the Orinoco Valley 

 are indistinguishable from those of Trinidad, and Doctor Hellmayr 

 recognizes the form on the same general grounds as are claimed for 

 it by the describer. Skins from Mount Koraima are slightly more 

 brownish above and duller yellow below than the rest; if this is 

 not due to the age of the specimens they may constitute a slightly 

 differentiated local race. Our series from eastern Colombia are also 

 a little darker, duller, more grayish, less brownish olivaceous above 

 than the typical Trinidad skins; the bill, too, is darker in the dried 

 skins. Doctor Chapman remarks similar differences in the case of 

 the specimens he handled from farther south at the foot of the 

 Andes. The differences may be due to the fresher condition of the 

 present lot of specimens (shot March 27 to April 29), but at any rate 

 they are too slight to require nomenclatural recognition. 



The race is, however, not nearly so well differentiated as one would 

 expect in view of its complete isolation from the typical form by the 

 interposition of the Amazon Valley. Some specimens of the southern 

 race are scarcely distinguishable, in fact, but when compared in series 

 the two are easily discriminated. The peculiar discontinuous distri- 

 bution of Basileuterus awicapiUus parallels that shown by a number 

 of other birds. 



Specimens exwm'med. — Trinidad : Carenage, 5 ; Heights of Aripo, 

 7; Caparo, 1 ; Princestown, 2 (including type) ; unspecified, 1. British 

 Guiana : Mount Roraima, 5 ; Annai, 1. Venezuela : Cristobal Colon, 

 Paria Peninsula, 9 ; San Antonio, Bermudez, 6 ; Cariaquito, 1 ; Caura 

 Valley, 1; Upata, 1; El Callao, 2; El Peru Mine, 2; San German de 

 Upata, 1; Altagracia, 1; Cocallar (2,600 feet), 1; unspecified, 5. 

 Colombia; Rio Negro, 7; Palmar, 1; La Colorada, 3; "Bogota," 5; 

 Buena Vista, above Villavicencio, 3. Total, 71. 



BASILEUTERUS CABANISI CABANISI von Berlepsch 



Basileuterus cabanisi von Behilepsch, Oru. Centralblatt, 1879, p. 63 (San 

 Esteban and Puerto CabelU>, Venezuela ; orig. descr. ; type now in coll. 

 Frankfort Mus.) ; Joum. f. Orn., vol. 32, 1884, pp. 276, 283, part (Bucara- 

 mauga, Colombia, and Puerto Cabello, Venezuela; crit.). — Chapman, Bull. 



