304 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



retrices. C. violaceus (type of Coronideus Cabanis) is structurally 

 quite identical with C. cyanopogon, C. cayanus, etc., but lacks any 

 white on the tail, has no blue or white markings on the head, and has 

 the under parts of the body grayish violet instead of white or pale 

 yellow. G. cyaiwmelas agrees with C. violaceus in the respects men- 

 tioned, but has the crest scarcely if at all developed, and has no light- 

 colored nuchal area. It will be seen, therefore, that any further sub- 

 division of the genus would necessitate a considerable addition to the 

 number of genera. 



JPlca cmrulea Temminck (= Corvus asm/reus Vieillot) is, however, so 

 different in its conspicuously exposed nostrils and differently con- 

 structed crest that its removal from Oyanocorax seems to me to be 

 quite necessary. 



CYANOCORAX AFFINIS ZELEDONI Ridgway. 

 TALAMANCA JAY. 



Similar to C. a. affinis,'^ but decidedlj' brighter colored, with under 

 parts of the body and tips of rectrices light creamy yellow instead of 

 white or yellowish white. 



Adults {sexes nlihe). — Head (except occiput), neck (except hind- 

 neck), and chest uniform black; a conspicuous superciliary patch, a 

 smaller patch immediate^ beneath posterior half of eye, and an 

 elongated patch on anterior and upper portion of malar region, cam- 

 panula blue; occiput and nape duller and more purplish blue; lower 

 hindneck, back, and rump plain dull heliotrope purple or dull brown- 

 ish violet-blue, the scapulars similar but rather darker; wings, upper 

 tail-coverts, and tail dull violet-blue or plum purple, the latter 

 broadly tipped with pale creamy yellow or yellowish white; under 

 parts of bodjr light creamy yellow; bill, legs, and feet black; iris 

 sulphur-yellow.* 



AduU jnaZe.— Length (skins), 346.5-362 (354); wing, 158-167.5 

 (161.. 5); tail, 159-169 (163); bill from nostril, 20.5-23 (21.5); depth 

 of bill at nostrils, 12.5-15 (14); tarsus, 48.5-50 (49.5); middle toe, 

 30-33 (31).'- 



Adult /'/rtrtZ,^.— Length (skins), 305-330 (319.5); wing, 156-157.5 

 (167); tail, 147.5-151 (149.5); bill from nostril, 20.5-21.5 (21); depth 

 of bill at nostrils, 13 ; tarsus, 49. 5-51. 5 (50) ; middle toe (one specimen), 

 30.5.'' 



nocorax affinis Pelzeln, Sitz. Ak. Wien, xx, 1856, 164. — Oyanocorax sdateri 

 Heine, Journ. fiir Orn., viii. Mar., 1860, 115. 

 ''Zeledon, manuscript. 

 « Four specimens. 

 <i Three specimens. 



