80 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



Range. — Subtropical Zone, eastern Panama (Mount Pirri). 



Remarks. — Described originally as a subspecies of B. nielanogenys^ 

 this form appears upon comparison to be worthy of full specific rank. 

 Its color-pattern is the same, but the yellow superciliaries, broadening 

 out in front so as to take up most of the forehead, the more gfeenish 

 sides of the head, with the dark area more restricted and far less con- 

 spicuous, and the yellowish under parts, are characters which defi- 

 nitely mark it off from inelafnogenys. Its range is just as definitely 

 cut off from that of melanogenys by the low country of Panama, since 

 both are species of the Subtropical Zone, It is known at present from 

 the type alone. 



Specimens exanmned. — Panama : Mount Pirri (near head of Rio 

 Limon, at 5,200 feet), 1 (the type). 



BASILEUTERUS BENSONI Griscom 



Basileuterus ben^oni Griscom, Amer. Mus. Nov. No. 280, 1927, p. 12 (CMtra, 

 4,700 feet, Veragua, Panama; type in coll. Amer. Mus, Nat. Hist.), 



Description. — Pileum chestnut, with a narrow lateral border of 

 black, meeting on the forehead, and tending to spread OA'er the nape ; 

 wide superciliaries pure white j» sides of the head black; upper parts 

 olivaceous black (No. 1 of Ridgway's " Color Standards ") ; wings 

 externally and tail more olivaceous (deep olive) ; chin and maxillary 

 region black, flecked with white ; under parts soiled white, the breast 

 and sides heavily shaded with neutral gray, and the flanks washed 

 with deep grayish olive; under wing-coverts grayish; bill horn 

 brown above, pale below; feet horn brown (in skin). 



Measurernents. — Male (two specimens) : Wing, 60-63; tail, 57-58; 

 bill, 11; tarsus, 20.5, Female (two specimens) : Wing, 57-60; tail, 

 61-56; bill, 10-10,5; tarsus, 20.5. 



Range. — Subtropical Zone of Veragua, western Panama, 



Remarks. — This recent interesting discovery by Mr, Rex R, Ben- 

 son adds a third member to the group exemplified by B. melanogenys., 

 which species was long supposed to be an isolated form, without near 

 allies. B. hensoni is in no sense, however, intermediate in its charac- 

 ters between B. nmlanogem/s and B. ignotus, but represents rather a 

 further development of the former. Its characters are clearly of 

 specific value, although the pattern of coloration is the same as that of 

 melanogenys. 



Specimens exa/tndned.-^Psiniiiiia.; Chitra, Veragua, 4 (including 

 type). 



BASILEUTERUS MELANOGENYS EXIMIUS Nelson 



Basileuterus melanogenys (not of Baird) Salvin, Proc. Zool. Soc. London, 

 1870, p. 183 (Volcan de Chiriqui, Panama). — Salvin and Godman, Biol. 

 Centr.-Amer., Aves, vol. 1, 1881, p. 174, part (Volcan de Chiriqui, Pan- 

 ama).— Shakpe, Cat. Birds Brit. Mus., vol. 10, 1885, p. 398, part (Chiri- 



