332 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ridged, or intermediate between tlie extremes as shown in R. erythro- 

 rhynchus and R. inca on the one hand and R. toco, etc., on the other. 

 In R. toco the mandibular rami are relatively much shorter and the 

 interramal space therefore shorter and more broadly triangular than 

 in other species. 



KEY TO THE SPECIES AND SUBSPECIES OF RAMPHASTOS. 



a. Terminal portion of maxilla and mandible red, the maxilla with a broad lateral 

 area of yellow or orange. (Ramphastos piscivorus.) 

 b. Breast without a distinct (if any) band of red; averaging larger, especially the 

 bill (culmen averaging 150.3 in male, 131.4 in female). (Southeastern Mexico 

 to Guatemala and British Honduras.) 



Eamphastos piscivorus piscivorus (p. 332). 



bh. Breast with a distinct red band bordering yellow of foreneck; averaging smaller 



(culmen averaging 136.1 in male, 120.4 in female). (Honduras to Colombia 



and Venezuela) Rampliastos piscivorus brevicarinatus (p. 334). 



aa. Terminal portion of maxilla yellow, of mandible black; maxilla with lower lateral 

 portion black or horn color or dull reddish margined above by black. 

 b. Mandible and latero-basal portion of maxilla light horn color distinctly tinged 

 with reddish or pinkish. (Southern Honduras to Venezuela and Ecuador.) 



Ramphastos swainsonii (p. 336). 

 bb. Mandible and latero-basal portion of maxilla black, dark grayish horn color, or 

 dark grayish olive. (Eastern Panama to Ecuador.) 



Ramphastos ambiguus (p. 339). 



RAMPHASTOS PISCIVORUS PISCIVORUS Linnseus. 



KEEL-BILLED TOUCAN. 



Adults {sexes alike). — Pileum and hindneck black, the latter 

 strongly washed with maroon; upper tail coverts white; rest of upper 

 parts slightly glossy greenish black; malar and auricular regions, 

 throat, and foreneck bright lemon or pure gamboge yellow, the 

 strongly convex posterior margin sometimes with a few touches of 

 red; under tail-coverts bright poppy red or carmine; rest of under 

 parts, including under side of wing, uniform black ; bill red and orange 

 terminally, yellowish along culmen and in an ovate-cuneate space on 

 lower side of proximal half of maxilla, elsewhere olive-dusky, in dried 

 skins; " legs and feet dusky (in dried skins). ° 



Young. — Similar to adults but coloration of bill much duller, with 

 differently colored areas not sharply defined. 



Adult male.— Length, (skins), 472-560 (527); wing, 187-220 (208.6); 

 tail, 147.5-178 (164.8); culmen, 133.5-159 (150.3); tarsus, 47-51 

 (49); outer anterior toe, 33-40 (36.4).^ 



o The colors of the bill, feet, etc., in living and freshly killed specimens are much 

 more bright, but I have no notes as to fresh colors in this subspecies. See, however, 

 under R. p. brevicarinatus. 



6 Ten specimens. 



