182 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



mm. of the terminal portion and u))out5.1 mm. of the basal portion of 

 the frontal shield (extendino- forward laterally) dull ytdlowish (orange 

 in life^); naked skin of forehead and cheeks light-eolored (pinkish or 

 flesh-colored in life?); leg's and feet black. 



Adult male. — Length (skin), about 583.5; wing, 270.5; tail, 208.2; 

 culmen, 85.9; greatest width of culmen near ))ase, 21.0; depth of bill 

 at base, 35.6; tarsus, 61.5; middle toe, 13.7. 



Northern Colombia (Rio Truando). 



Ostinops guaiitjiozinus (not of Bonaparte) Cassin, Proc. Ac. Nat. Sci. Phila. , 1860, 

 138, 139 (Rio Tniando, n. Colombia; descr. ; crit. ). 



Cassicus gnatiinozinus Cassin, Proc. Ac. Nat. Sci. Pliila., 1867, 71, part (Rio 

 Truando). 



Gymnosiinops r/aatimozinu^ Salvi}^ and Godman, Biol. Centr.-Ani., .\vefe, i, 1886, 

 439, part (Rio Truando). 



Gymnost'mops cassini Ricumond, Auk, xv, Oct., 1898, 327 (Rio Truando, n. Colom- 

 bia; coll. U. S. Nat. Mus.). 



GYMNOSTINOPS GUATIMOZINUS (Bonaparte). 

 BLACK OROPENDOLA. 



Adult male. — Head, neck, upper back, and entire under parts, 

 except under tail-coverts, uniform deep black, with a faint l)luish 

 gloss; wings black, with innermost coverts dark chestnut or bay; 

 lower back and scapulars dark chestnut or bay, the feathers l^lack 

 beneath surface; rump and upper tail-coverts black, tinged with dark 

 chestnut or bay; under tail-coverts similar, l)ut the longer ones uni- 

 form bay; bill black, with the tip 3'ellowish for about 15».l mm. ; naked 

 skin on forehead light-colored (apparently pinkish or flesh-colored in 

 life), but that of cheeks dusky; legs and feet black; length (skin), 

 about 163.6; wing, 261.6; tail, 207; culmen, 65.5; greatest width of 

 culmen near base, 13.2; depth of bill at l)ase, 27.9; tarsus, 59.7; middle 

 toe, 11.1.' 



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

 but the black rather less intense; length (skin), loo.l; wing, 200.7; 

 tail, 153.7; culmen, 52.8; greatest width of culmen near l)ase, 11.4; 

 depth of bill at base, 23.4; tarsus, 44.5; middle toe, 33. ~ 



Northern Colombia (Guaripata; Turbo; lower Magdalena River; 

 Remedios, Antioquia). 



Ostinops guattmozinus Bonaparte, Compt. Rend., xxxvii, 1853, 833 (Guaripata, 

 Colombia); Note.s Orn. Coll. Delattre, 1853, 10. — Sclater and Salvin, Proc. 

 Zool. Soc. Lond., 1879, 508 (Remedios, prov. Antioquia, Colombia; descr. 

 eggs). — Sclater, Ibis, 1883, 149, part (northern parts of Colombia; Guari- 

 pata; Remedios, Antio(iuia) . 



[Ostinops'] guatemozinus Sclater and Salvin, Nom. Av. Neotr., 1873, o5. 



iNo. 128113, U. S. Nat. Mus., Lower Magdalena River, Colombia, June 28, 1892; 

 Lieut. AVirt Robinson, U. S. A. 



^No. 17846, U. S. Nat. Mus., Turbo, northern Colombia; Dr. A. Schott. 



