EUCOEYSTES.— aYMNOSTINOPS. 437 



the forest-country of the Atlantic or eastern side of Guatemala, up to an elevation of 

 about 2000 feet, it is not found, so far as we know, anywhere in the forest-lands 

 bordering the Pacific ; it is found in the western forests of Mexico ; Sumichrast speaks 

 of having observed it in the woods of Cerra de la Defensa, but its name is absent 

 from his Tehuantepec list. Passing southwards, we find, as is so often the case with 

 birds of purely eastern domicile in the north, that E. wagleri in Nicaragua, Costa Kica, 

 and Panama frequents the forests of both sides of the mountain-ranges. 



GYMNOSTINOPS. 



Gymnostinops, Sclater, Cat. B. Brit. Mus. xi. p. 312 (1886). 



Gymnostinops, as distinguished from Ostinops, with which the species were classed 

 until Mr. Sclater separated them in his recent catalogue, contains four species, one of 

 which, G. montezumce, is widely distributed within our limits from Southern Mexico 

 to Panama. Another, G. guatemozinus, has a very limited range in Northern Colombia 

 and occurs on our southern frontier. The other two are purely South-American — 

 one being found near Para, at the mouth of the Amazons, and the other widely dis- 

 tributed over the whole upper basin of that river. No species of Gymnostinops occurs 

 in South-eastern Brazil. 



The bill of Gymnostinops montezumoe has the culmen slightly decurved, the frontal 

 shield is produced backwards, as far as a line between the anterior edge of the eyes ; 

 its posterior outline is semicircular, the nostrils are just visible from above, not hidden 

 as in JEucorystes ; the lateral view of the sheath of the mandible is an isosceles triangle, 

 and from the base of the sheath below the eye is a large subquadrangular naked patch 

 divided by a narrow wedge-shaped strip of feathers along the edge of the ramus of the 

 jaw ; the feet are strong and insessorial ; the wings are rather short and rounded, the 

 third and fourth the longest, the second equalling the fifth, the first about equal to 

 the eighth ; the median secondaries are broad and rather longer than the outer ones ; 

 the tail is much rounded, the rectrices being also rounded at their tips and broad, the 

 central feathers fall short of the longest, which are the next pair to them. 



1. Gymnostinops monteznmae. 



Cacicus montezuma, Less. Cent. Zool. p. 33, t. 7 ^ Scl. P. Z. S. 1856, p. 300 ^; P. Z. S. 1858, p. 358 ' ; 



P.Z.S. 1859, p. 365 ^ Scl. & Salv. Ibis, 1859, p. 19'; Moore, P. Z. S. 1859, p. 57'; 



Taylor, Ibis, 1860, p. HI' ; Cass. Pr. Ac. Phil. 1867, p. 71 ^ 

 Ostinops montezuma, Scl. P. Z. S. 1859, p. 380 ' ; Ibis, 1883, p. 148 " ; Lawr. Ann. Lye. N. Y. vii. 



p. 397"; ix.p. 104 ^^ Scl. & Salv. P. Z. S. 1864, p. 353" ; 1867, p. 379"; 1870, p. 836"; 



Sumichrast, Mem. Bost. Soc. N. H. i. p. 553 " ; Frantz. J. f. Orn. 1869, p. 303 " ; Nutting, 



& Eidgw. Pr. U.S. Nat. Mus. vi. pp. 383 ", 401 " ; Perez, Pr. U.S. Nat. Mus. 1886, 



p. 149 ". 

 Gymnostinops montezuma, Scl. Cat. B. Brit. Mus. xi. p. 313 ". 



