FAMILY RAMPHASTIDAE 505 



Archipielago de Las Perlas. The only fossil records to date are 

 from the Pleistocene of Brazil. 



KEY TO SPECIES OF RAMPHASTIDAE 



1. Throat and foreneck yellow ; form large, robust ; nostrils opening on posterior 



face of raised base of maxilla 2 



Throat and foreneck black or grayish blue; smaller, form slender; nostrils 

 opening on upper surface of maxilla at base 3 



2. Tip of bill red, or orange-red ; smaller. 



Keel-billed toucan, Ramphastos sulfuratus brevicarinatus, p. 521 

 Tip of maxilla yellow, of mandible black (in some narrowly tipped with 

 yellow) ; larger. 



Swainson's toucan, Rarnpliastos swainsomi, p. 524 



3. Breast, abdomen and sides green; throat blue. 



Emerald toucanet, Aulacorhynchus prasinus, p. 505 

 Throat and foreneck black 4 



4. Breast black, under tail coverts red ; back and rump dull green. 



Cassin's aragari, Selenidera spcctabilis, p. 518 



Upper breast yellow, more or less washed red; under tail coverts brown, 



mixed lightly with yellow or red ; back black, rump red 5 



5. Maxilla, except at base and tip, buffy white ; cutting edge strongly and 



heavily notched; lower breast with a narrow band of black mixed with 

 red. 



Collared aragari, Pteroglossus torquatus torquatus, p. 510 

 Maxilla, except at base, bright red or orange-red; cutting edge lightly 

 notched ; lower breast and abdomen with a broad band of red. 



Frantz's aragari, Pteroglossus jrantsii, p. 514 



AULACORHYNCHUS PRASINUS (Gould): Emerald Toucanet, 

 Currutaco 



Figure 64 



Pteroglossus prasinus Gould, Proc. Zool. Soc. London, pt. 2, November 25, 1834, 

 p. 78. (Valle Real, Veracruz, Mexico.) 



A small toucan, mainly green in color; throat blue. 



Description. — Length 285-320 mm. Sides of maxilla concave from 

 the nostril forward for two-thirds of length. Adult (sexes alike), 

 crown and hindneck olive-green to brownish olive ; rest of upper 

 surface, including basal two-thirds of tail, plain grass green, the rump 

 in some slightly yellowish green; distal third of tail changing through 

 bluish green to dull blue, tipped with cinnamon-rufous ; primaries 

 and secondaries sooty black, the latter with the outer webs grass 

 green like the back; space surrounding the eye and side of head 

 below, chin, and upper foreneck rather dull blue, becoming brighter 

 on the foreneck; auricular region, side of neck, and rest of under 



