Cory — The Genus Rhynchocylus. 223 



Range: Northeastern Peru (Pebas);? central Peru 1 (La Merced; Chan- 

 chamayo); eastern Ecuador (Rio Napo); southern Colombia (Florencia). 2 



This well marked race differs from R. f. flaviventris in having the upper 

 parts decidedly darker (more olive green and less yellowish green); lores 

 yellowish olive (without rusty tinge) ; lesser and median wing coverts green- 

 ish like the back; throat and breast yellowish green, like the sides, becom- 

 ing clearer yellow on middle of belly. Wing 56; tail 48 mm. 3 



This form is close to R. f. borboe and resembles it in coloration of lores and 

 wing coverts, but it differs in its slightly more greenish upper parts and 

 decidedly more greenish throat and chest (not clear olive yellow as in 

 borboe). 



Rhynchocyclus flaviventris borbae Hellmayr. 



Rhynchocyclus flaviventer borboe Hellmayr, Verh. zool.-bot. Gesell. Wien, 

 liii, 1903, p. 208 (Borba, Rio Madeira, Brazil). 



Range: Northwestern Brazil (Lower Rio Madeira; Borba; Marmellos 4 

 and Monte Verde, Rio Purus). 5 



This form is similar to R. f. viridiceps from northeastern Peru, but differs 

 in its clear olive yellowish throat and chest (not light yellowish green as in 

 viridiceps) . 



lAccording to Hellmayr (Novit. Zool., XVII, 1910, p. 296) two specimens from La 

 Merced, central Peru (preserved in the Branicki Museum) are larger, and may prove to be 

 a different form. Wing 60 H ; tail 49}^ and wing 63 V£ ; tail 53 mm. 



2Chapman Bull. Amer. Mus. Nat. Hist., XXXVI, 1917, p. 436. 



3 Measurements from specimen from Florencia in the American Museum of Natural 

 History. The measurements of the type, as given by Sclater & Salvin (I. c.) are wing 2.2 

 in.; tail 1.7 in. I have not seen a specimen from Ecuador or Peru. 



4Hellmayr, Novit. Zool., XVII, 1910, p. 295. 



sSnethlage, Bol. Mus. Goeldi, VIII, 1914, p. 369. 



