1870.] MESSRS. SCLATER AND SALVIN ON THE CRACIDE. 939 
maccalli, the ends of the tail-feathers are pure white; but in some 
skins from Vera Cruz they are quite as fulvous as in Guatemalan 
examples. Again, a skin from Yucatan, obtained by Dr. A. Schott 
in 1865, is in our opinion quite undistinguishable from the type of 
O. maccalli, so that it is not possible to draw a geographical line 
between the two forms. There is also a certain amount of variation 
in the ventral plumage in this species, some, particularly those from 
Vera Cruz, being strongly tinged with rufous. 
Under these circumstances we are compelled to regard O. vetula 
as a widely extended and somewhat variable species, ranging from the 
Rio Grande on the north over the whole Atlantic slope of Central 
America as far as Honduras on the south. On the Pacific slope it 
is supplanted by the following species. 
14, OrTALIDA LEUCOGASTRA. 
Penelope albiventer, Less. 1842, p. 174; Gould, Voy. Sulph. 
Zool. p. 48, t. 31. 
Penelope leucogaster, Gould, P. Z: S$. 1843, p. 105. 
Ortalida leucogaster, G. R. Gray, List of Galline, p. 13; Sel. et 
Salv. Ibis, 1859, p. 224; Scl. P. Z.S. 1859, p. 391. 
Chamepetes leucogastra, Reich. Tauben, p. 142. 
Penelopsis leucogastra, Bp. C. R. xlii. p. 877 (1856). 
Bronzino-olivacea, pileo obscuriore ; capitis lateribus et corpore sub- 
tus ad medium pectus plumbeis: abdomine toto pure albo: cauda 
e@neo-viridi, rectricibus lateralibus albo terminatis : long. tota 16°5, 
ale 7°3, caud@ 8, tarsi 2°5. 
Hab. Realejo, Nicaragua (Lesson) ; Pacific slope of Guatemala 
(Salvin). 
This Guan entirely replaces O. vetula on the Pacific slope of 
Central America, where, however, so far as we know, its range is 
confined between the frontier of Mexico on the north, and Realejo 
in Nicaragua on the south. Throughout the Costa Grande of Gua- 
temala Salvin found it very abundant on the mountain-slopes from 
an elevation of about 3000 feet to the shores of the Pacific Ocean. 
__ The pure white of the underparts of this species renders it easily 
distinguishable from its neighbouring ally O. vetula, though in 
habits no difference was noted. The eggs are white, with the surface 
somewhat roughened, as in other members of this family. 
15. ORTALIDA GARRULA. 
Phasianus garrulus, Humb. Obs. de Zool. i. p. 4. 
Penelope garrula, Wag). Isis, 1830, p. 1111. 
Ortalida garrula, Wag). Isis, 1832, p. 1227; G. R. Gray, List of 
Gall. p. 12. 
Cineracescenti-enea, pileo rufo : subtus valde dilutior, abdomine toto 
albo : remigibus externis castaneis : cauda obscure enea, rectri- 
cibus quatuor extimis albo terminatis: long. tota 21, ale 8°5, 
caude 9°5, tarsi 2°8. 
Hab. Coast-region of New Granada, Magdalena valley (Hum- 
