EUCORYSTES.—GYMNOSTINOPS. 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 Rica, 
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. montezume, is widely distributed within our limits from Southern Mexico 
to Panama. Another, G. guatemozinus, has avery 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 montezume 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 Lucorystes; 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 montezume. 
Cacicus montezuma, Less. Cent. Zool. p. 33, t.7*; Scl. P. Z. 8.1856, p. 300°; P. Z.S. 1858, p. 358° ; 
P. Z.8. 1859, p. 365+; Scl. & Salv. Ibis, 1859, p. 19°; Moore, P.Z.S. 1859, p. 57°; 
Taylor, Ibis, 1860, p. 111%; Cass. Pr. Ac. Phil. 1867, p. 71°. 
Ostinops montezume, Scl. P.Z.S8. 1859, p. 380°; Ibis, 1883, p. 148°; Lawr. Ann. Lyc.N. Y. vii. 
p. 297"; ix.p. 104; Scl. & Salv. P. Z. S. 1864, p. 353°; 1867, p. 279"; 1870, p. 836” ; 
Sumichrast, Mem. Bost. Soc. N. H. i. p. 553°; Frantz. J. f. Orn. 1869, p. 302 ; Nutting, 
& Ridgw. Pr. U.S. Nat. Mus. vi. pp. 383°, 401°; Perez, Pr. U.S. Nat. Mus. 1886, 
p. 149”. 
Gymnostinops montezume, Scl. Cat. B. Brit. Mus. xi. p. 313”. 
