4. G i-MNosTiNors. 313 



Ketj to the Species. 



A. Crowu black. 



a. Eelly cliestuut : 



I thighs black 1. montczumor, p. 313. 



) thighs chestnut 2. hifasciutua, p. 313. 



h. Belly black 3. guathnuzinus, p. .■J14. 



B. Crown green 4. \jHr(waru(in, p. 314. 



1. Gymnostinops montezumaB. 



Cacicus montezuraa, Less. Cent. Zool. p. 33, pi. 7 ; Sclafer, P. Z. S. 



1856, p. 300, et 1859, pp. 57, 365 ; Scl. et Salv. Ibis, 1859, p. 19. 

 Cassiciis montezumffi, Cass. Pr. Ac. Sc. Phil. 1867, p. 71. 

 Ostinops montezumae, Sclater, P. Z. S. 1859, p. 380; id. Ibis, 1883, 



p. 148; Cassin, Pr. Ac. Sc. Phil. 1860, p. 139 ; Scl. Cat. A. B. p. 128; 



Sumichrast, Mem. Boston Soc. N. H. vol. i. p. 553 (Vera Cruz) ; 



Scl. et Sale. P. Z. S. 1864, p. 353, 1867, p. 279, 1870, p. 836; 



iid. Noniencl. p. 35 ; Salv. Ibis, 1865, p. 195. 

 Ostinops bifasciata, Cab. Mas. Ilein. i. p. 187 (pai-tim). 



Above dark chestnut, head black ; below, throat black, passing 

 gradually into the dark chestnut abdomen ; thighs and under wing- 

 coverts black ; tail yellow, two middle rectrices blackish ; bill black, 

 tip and naked space at the base of the lower mandible yellow; feet 

 black: whole length 19 inches, wing 10-3, tail 8. Female simildir, 

 but smaller: whole length 12-5 inches, wing 7*8, tail 6. 



Hah, S. Mexico, and Central America down to Panama. 



a. S ad. St. Mexico. Purchased. 



b. 5 ad. St. Mexico. J. Philips, Esq. [P.]. 



c. d. c? 2 ad. sk. Jalapa, Mexico (de Oca) Sclater CoU. 



e. cS ad. sk. Choctum, Vera Paz (Salvin). Salvin-Godman Coll. 



/. 5 ad. sk. Chisec, Guatemala (Salvin). Salvin-Godman CoU. 



f/. (S ad. sk. British Honduras {JSlanca- Salvin-Godman Coll. 



tieaux). 



h. cJad.sk. Costa Rica (Car?H/o/). Salvin-Godman Coll. 



hJ- 6 ? ad. sk. Lion Hill, Isthmus of Salvin-Godman CoU. 



Panama (McLeannan). 



2. Gymnostinops bifasciatus. 



Cassicus bifasciatus, Spiv, Av. Bras. i. p. 65, t. 61 ; Cassin, Pr. Ac. 



Sc. Phil. 1867, p. 70. 

 Psarocolius bifasciatus, Wagl. Si/st. Av. sp. 2. 

 Ostinops bifasciatus, Cassin, Pr. Ac. Sc. Phil. 1860, p. 139; Scl. 



Ibis, 1883, p. 149 ; Scl. et Salv. Nomencl. p. 35 ; Pelz. Orn. Bras. 



p. 192. 



Like 0. montezumcf, but distinguishable by its pale chestnut 

 thighs and crissum. 



Jlah. Lower Amazonia. 



This Cassique has been united by Dr. Cabanis and other Avriters 

 to G. rnontezumrr ■ but Mr. Cassin has shown that the two birds are 

 quite distinct, though nearly allied. 



I am not aware of the existence of any specimens of G. bifasciatus 



