8 BULLETIISr 50, UNITED STATES NATIONAL MUSEUM. 



ee. Head and under parts white; abdomen light yellow; adult male without 

 red on crown, but with a nuchal band of light yellow; larger (wing 



more than 150 mm.) Leuconerpes (extralimital).o 



<x. Lateral ridge or groove of maxilla more distinct, obvious for greater part of 



length of maxilla; bill relatively broader, its width at middle of nostrils 



decidedly greater than its depth at same point. 



d. Smaller (wing less than 170 mm.); back not black, 



e. Nostrils more or less covered by antrorse bristly prefrontal feathers; bill 



more compressed anteriorly; pileum at least partly red, not crested; 



back plain yellowish olive-greenish; under parts barred with olive and 



yellowish Chloronerpes (p, 124). 



ee. Nostrils wholly exposed (no trace of antrorse prefrontal feathers); bill 

 less compressed anteriorly; pileum without red, usually crested; back 

 rufous or chestnut (with or without black bars), plain yellowish buff, 

 or barred with black and yellow or olive-brown and buff. (Celex.) 

 f. Posterior outer toe decidedly shorter than anterior outer toe; culmen 

 slightly convex to nearly straight, and not sharply (though very 

 distinctly) ridged; back and under parts not plain buff -yellow, 

 g. Bill much shorter (decidedly shorter than head) and stouter. 



Celeus (p. 138). 

 gg. Bill much longer (about as long as head) and more slender. 



Cerchneipicus (extralimital).^ 



ff. Posterior outer toe nearly as long as anterior outer toe; culmen strongly 



convex, compressed into a sharp (almost knife-like) ridge; back and 



under parts plain buff-yellow Crocomorphus (extraUmital). c 



dd. Larger (wing 180-250 mm.); back black (sometimes with a white stripe 



along each side), (Picex.) 



e. Bill less depressed, its width at middle of nostrils not greater than its 



depth at base of exposed culmen; antrorse prefrontal plumes small, 



not covering nostrils; plumage of neck shorter, more scant, the feathers 



of harsher texture; under parts of body (except chest) pale brownish 



or dull yellowish barred or spotted with dusky Ceophloeus (p. 146). 



ee. Bill more depressed, its width at middle of nostrils much greater than its 



depth at base of exposed culmen; antrorse prefrontal plumes large, 



completely covering nostrils; plumage of neck longer, softer, blended; 



under parts uniform blackish. 



/. Conspicuously crested; outermost primary normal; two stripes on side 



of head, a stripe along side of neck, under wing-coverts, and proximal 



portion of inner web of remiges, white or yellowish white. 



Phloeotomus (p. 153). 



a Leuconerpes Swainson, Classif. Birds, ii, 1837, 310. (Type, Picas candidus 

 Otto), — Colomb'picus Malherbe, Nouv. Classif. Picin^es, etc., July, 1850, 45. (Type, 

 Picus dominicensis Vieillot=P. candidus Otto.) — Phymatoblepharu^ Reichenbach, 

 Handb. Scansores, Picinaj, 1854, 379. (Type, Picus candidus Otto.) — Columbpicus 

 (emendation) Strickland, Jardine's Contr. Om., no. 1, for 1851 [pub. Feb., or later, 

 1851], 18, in text; Malherbe, Mon. Picid., Introd., 1861, pp. xlviii, liii. Southern 

 Brazil, Argentina, etc.; monotypic. (Placed in Melanerpes by Hargitt, Cat, Birds 

 Brit. Mus., xviii, 1890, 140, 148, but obviously not belonging there.) 



& Cerchneipicus Bonaparte, Ateneo Italiano, ii, 1854, 123. (Type, as fixed by 

 Gray, 1855, Piais tinnunculus Wagler.) — Cerchneopipo (emendation) Sundevall, 

 Consp. Av. Picin., 1866, 116. Guianas to Paraguay and upper Amazon Valley; 

 three species. 



c Crocomorphus Hargitt, Cat. Birds Brit. Mus., xviii, 1890, 439. (Type, Picus 

 flavus Mtiller.) Amazon Valley, Guianas, Venezuela, and Trinidad; two species. 



