176 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



•attenuated terniinully. especially the outermost, which is alnuptly 

 emaiyiiiated on inner web. Tail about two-thirds as long as wing, 

 rounded or slightly graduated, with the middle pair of rectrices abruptly 

 shorter than the next (intermediate 1)etween second and third from out- 

 side), the rectrices contracted terminalh' and obtusely pointed. Tarsus 

 nearly as long as maxilla from nostril, stout, the upper portion covered 

 by projecting tibial feathers, the anterior scutella ver}^ distinct; middle 

 toe. with claw, nearly as long as tarsus; outer toe with claw reaching 

 a little lieyond base of middle claw, the inner slightly shorter; hallux 

 decidedly shoi-ter than lateral toes l)utmuch stouter, its claw decidedly 

 shorter than the digit. A spai'se crest of ver}' narrow elongated 

 feathers springing from middle of crown. 



Coloi'df'ion. — Back, scapulars, wings, middle pair of rectrices, breast, 

 abdomen, and thighs black, more or less glossy; tail (except middle 

 pair of rectrices) ^^ellow; rest of plumage dark chestnut; bill light 

 colored. 



R<in<ic. — Southern Mexico to Venezuela and northwestern Peru. 

 (Monotypic.) 



ZARHYNCHUS \A^AGLERI WAGLERI (Gray). 

 WAGLER'S OROPENDOLA. 



Adult male. — Head, neck, and upper chest dark chestnut-brown or 

 seal brown, somewhat darker on the crown and slender crest-feathers, 

 the plumage pure white basally; back, scapulars, and wing-coverts 

 black, the feathers broadlv margined with glossy greenish black (more 

 narrowly on the greater coverts); rest of wings, together with upper 

 chest, breast, and upper abdomen uniform l>lack, more or less strongly 

 glossed wnth bluish green; flanks, rump, and upper tail-coverts deep 

 chestnut or chocolate brown, the lower abdomen similar but rather 

 lighter; anal region and undeV tail-coverts light chestnut; thighs dull 

 black, usually more or less tinged with chestnut; tail clear chrome 

 yellow, the luiddle pair of rectrices black, except at extreme base, the 

 outermost pair with outer web blackish; bill pale greenish yellow 

 (sometimes drying dusky or olive), usually showing some oliv(> or 

 dusky on terminal half of mandible; legs and feet (in dried skins) 

 dusky; length (skins), 334-381 (349.5); wing, 188-228.1 (214.1); tail, 

 121.4-136.7 (131.6); culmen. 65.5-71.1 (68.1); depth of bill at base, 

 26.7-29 (27.9); greatest width of frontal shield. 19.8-22.4 (21.3); 

 tarsus, 38.4-41.1 (39.6); middle toe, 28.5-32.5 (29.7).' 



Adult female. — Much smaller than the male; similar in coloration, 

 but black of breast, etc., less intense, less glossy, blending gradually 

 into the deep chestnut of adjoining parts; bill darker; length (skins), 

 251.5-289.6 (267.7); wing, 149.1-156.2 (152.9); tail, 94.7-105.4 (101.6) 



^Eleven specimens (basal depth of bill measured in only four). 



