NATURAL SCIENCES OF PHILADELPHIA. 139 



tinct from any species in Acad. Coll. or that we find described, except as above. 

 It is nearly allied to 0. Montezumae of Mexico and Central America, and 0. 

 bifasciatus of Northern Brazil, both of which are in the Acad. Coll. and are 

 distinct from each other. 



The present bird differs from both of the above species in being larger, 

 darker colored and having a lengthened almost filiform crest. The bill also i3 

 disproportionately longer and wider at base, with a rounded termination in 

 front. It is not without scruples that I apply the name above to this bird ; the 

 description by the Prince Bonaparte, as cited, not being sufficient for the recog- 

 nition of any species nearly related to another.* 



"At Camp Abert, on the Truando, before reaching the Cordilleras, one 

 specimen only seen, which was shot; it was very shy and seemed to be a stranger." 

 (Mr. C. J. Wood.) 



43. Cassicus icteronotus, Vieillot. 



Cassicus icteronotus, Vieill. 

 Sw. B. of Braz., pi. 3. 

 From Turbo and the delta of the Atrato River. "Very abundant at Turbo, 

 builds many nests on the same tree, which are long and hanging, and entered 

 from the top. Always seen in large parties and very noisy, especially in the 

 morning, although their notes are rather agreeable." (Mr. C. J. WoodJ. 



44. Cassicus chrysonotus, Lafresnaye? 



Cassicus chrysonotus, Lafres. 

 D'Orb. Voy. Am. Mer. Ois. pi. 52 ? 

 From Turbo. A single specimen in young plumage appears to be this species. 



45. Cassicus uropygialis, Lafresnaye ? 



Cassicus uropygialis, Lafr. Rev. Zool. 1843, p. 290? 

 Falls of the River Truando. 

 Specimens not mature nor in good condition appear to be this species. 



*The three nearly allied species are as follows : 



1. OSTINOPS B1FASCIATUS, (Spix). 



Cassicus bifasciatus, Spix, Av. Bras., i. p. 65 (1824). 

 Spix, Av. Bras., i. pi. 61. 

 Naked space on the cheek, integral (not divided as in the two succeeding species). 

 Crest feathers rather long, not so narrow nor so long as in O. guatimozinus, but longer 

 than in O. Montezumae. Head and breast brownish black, entire upper parts of body, 

 abdomen, under tail coverts and tibia light chestnut brown, tail yellow, central two 

 feathers dark brown. Total length, male 18 to 20 inches. Naked space on cheek pre- 

 cisely as figured by Spix as above cited, which figure is sufficiently accurate. Two 

 specimens from Para, in Acad. Coll. 



2. Ostinops Montezumae, (Lesson). 



Cacicus Montezumae, Less. Cent. Zool p. 33, (1830). 

 Less. Cent. Zool. pi. 7,Gervais, Atlas de Zool. pi. 33. 

 Naked space on the cheek partially divided by a line of short imbricated features 

 above the lower edge of the lower mandible. Crest feathers short and inconspicuous, 

 shorter than in either of the other species here described. Plumage much as in preced- 

 ing, but with the tibia brownish black. Total length, male, about 20 inches. Naked space 

 on cheek accurately represented in both plates above cited, which are otherwise very 

 accurate. Nine specimens in Acad. Coll. including Lesson's original which is labelled as 

 from Mexico, others are from Nicaragua. 



3. Ostinops guatimozinus, Bonaparte. 



Osiinops guatimozinus, Bonap. Compt. Rend. 1853, p. 833. 

 Naked space on cheek completely divided by a line of short, imbricated feathers nearly 

 on a line with the lower edge of lower mandible. Crest feathers long and pendant, 

 longer than in either of the preceding. Plumage generally resembling that of both the 

 preceding, but darker, entire under parts brownish black, tibia black. Total length 21 to 

 22 inches. One specimen in National Museum, Washington. 



I860.] 



