2 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Other supposed Tanagridae which it seems to me must be removed from 

 this group are the more slender -bill'ed species referred to the genus 

 Chlorosj?mgus^ constituting numbers 16 to 32 of Dr. Sclater's "cata- 

 logue." These I would place in the family Mniotiltidfe under the 

 generic name IIemisj)ingus Cabanis. At the same time, I would add 

 to the Tanagridte a species hitherto placed in the Coerebida, namely. 

 "Z>«2(m«^" jpidcherrima^ the tj^pe of a new genus, Iridophanes.^ To 

 what further extent the limits of the Tanagridte may require readjust- 

 ment I have not at present any opinion to express. 



The following '"kej^" to the genera found from the Panama Railroad 

 northward is mainly artificial and is chiefly based on Central American 

 species. 



KEY TO THE GENERA OF TANAGRID^. 



a. Tail less than two-thirds as long as wing; bill short, triangular in vertical profile 

 (width at base greater than distance from nostril to tip of maxilla) , compressed 

 terminally, the maxillary tomium distinctly dilated or convex basally or else 

 gonys very conspicuously upcurved; plumage chiefly uniform bright green, or 

 blue and green, above, without markings on back or wings or chestnut on head, 

 or else silky, blended and metallic, dark steel blue, violet-black, metallic olive- 

 green, or steel gray above, with or without light blue, yellow or rufous on head ; 

 stomach a membraneous sac.^ {Euphonur.) 

 h. Bill more depressed, its basal depth less than its width at rictus; breast yellow, 

 rufous, glossy blue-black, or green. 



c. Upper parts green or green and blue; throat green CMoroplionia (p. 4) 



cc. Upper parts dark steel blue, glossy violet-black, metallic olive-greenish, or 

 greenish gray (with or without yellow, blue or rufous on pileum); throat 

 black, dark steel blue, violet- blackish, gray, olive-greenish, or yellow. 



Euphonia (p. 8) 

 hh. Bill thicker, its basal depth equal to its width at rictus; breast gray. 



Pyrrhuphonia (p. 31) 

 aa. Tail more than two-thirds as long as wing, or else {Chlorochrysa^) the bill very 

 slender; bill exceedingly variable in shape, but never as in "o;" if short and 

 triangular {Procnopis* and Calospiza, part), its width at base not greater than 

 distance from nostril to tip of maxilla, the maxillary tomium not distinctly 

 convex or dilated subbasally, and the gonys not conspicuously upcurved; 

 plumage exceedingly variable, but not as in section "a;" stomach a muscular 

 ' ' gizzard. ' ' ( Tanagrse. ) 



b. Tail but little more than half as long as wing Buthraupis '" (p. 32) 



bb. Tail much more than half as long as wing. 



r. Outermost (ninth) primary longer than innermost (first). 



^ Iridophanes Ridgway, Proc. Wash. Acad. Sci., iii, Apr. 15, 1901, 150. (Type, Dacnis 

 pulcherrima Sclater.) 



Iridophanes pideherrima is certainly not a Dacnis, but seems to be related to the 

 "Tanagrine" genera Chlorochrysa and Hemithraupis, especially the latter. 



2 See Forbes, Proc. Zool. Soc. Lend., 1880, pp. 143-147. 



'An extralimital genus. {Chlorochrysa Bonaparte, Compt. Rend., xxxii, 1851, 76; 

 type, Callospiza calUpar,ra Tschudi. ) 



* An extralimital genus. {Procnopis Cabanis, in Wiegmann's Archiv. fiir Natiirg., 

 1844, pt. i, 284; type, P. atrocwruleaTschndi.) 



^Central American species only; the South American species have the tail longer 

 and would be excluded bv the character mentioned. 



