188 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



shaped l>ill. dciinite though slight superior opercuhun to the rather 

 hirge and high nostrils; weak feet, slightly rounded tail, and rounded 

 wing (ninth primary intermediate ])etween fourth and third). Exce})t 

 in its very small size it comes rather near the aberrant species {('. l<.n- 

 cm'hampkm and C. chri/sonotHs) in structural details, l)ut has the bill 

 more perfectly wedge-shaped, with the cuhnen tjuite straight, instead 

 of distinctly decurved terminally. 



Without better specimens of C. chrymnof^ix and O. alhirosfrLs^ how- 

 ever, I am not able to quite satisfy myself as to the proper limits of 

 the genus, and therefore for the present leave them as defined by 

 Dr. Sclater. 



KEY TO THE SPECIES OF CACICUS. 



a. Rump (also tail-coverts, base of tail, and patch on wing-coverts), yellow; culnicu 



31.8 or more. (Colombia, includiiig Isthmus of Panama. ) 



Cacicus vitellinus (p. ISS) 



aa. Rump orange-red or scarlet; culmen not more than 30.5. (Isthmus of Panama 



to Nicaragua. ) Cacicus microrhynclius (p. 18H) 



CACICUS VITELLINUS Lawrence. 

 LAWRENCE'S CACIQUE. 



Adult male. — General color uniform deep black, with a slight bliush 

 gloss in certain lights, the plumage of neck and body white at base 

 (concealed); lower l)ack, rump, upper and under tail-eoverts, and small 

 wedge-shaped patch on inner portion of wing, rich saflfron yellow vary- 

 ing to orange-yellow; l)asal portion of tail (mostly concealed ])y the 

 coverts) paler yellow, the shafts of middle rectrices, wdthin the yellow- 

 portion, nearly or quite white; innermost secondaries a])ruptly white 

 at concealed ))ases; l)ill pale grayish yellow or greenish yellow, some- 

 times darker (more olivaceous) basally; legs and feet black; length 

 (skins), 260.dt-2iU. 0(275.8); wing, 162.6-180.3 (172.2); tail, !(»(;. 7-117.5 

 (111.8); culmen, 36.5-40.6 (39.1); depth of bill at base, 15.7-17.5 (16.8); 

 width of culmen between loral antite, 7.9-9.7 (8.9); tarsus, 31-35.1 

 (32.8); middle toe, 21.6-25.4 (23.9).' 



Adidt feinale. — Similar to the male but decidedly smaller, and the 

 black duller, especially on the under parts where usually more or less 

 tinged with olive on abdomen and llanks; length (skins), 226.1-254 

 (234.2); wing, 130-136.7 (133.4); tail, 88.4-96.5 (92.2); cuhnen, 31.8- 

 33 (32.3); depth of l)ill at base, 13..5-15 (14.2); width of culmen ])etween 

 loral antiiw 7.4-7.9 (7.6); tarsus, 27.4-29.7(28.5); middle toe. 20.3-20.8 

 (20.3).^' 



Immatwre 'male. — Similar in coloration to adult female, t>ut larger. 



Northern Colombia (lower Magdalena Valley; Remedios. province 

 of Antioquia; Turbo; Rio Atrato, etc.), including Isthnms of Pantuna 

 (Lion Hill, Panama, etc.). 



* Five specimens. • Six specimens. 



