Birds from Yucatan. 91 
an inch. Nostrils small, oval, partly covered by feathers. 
Upper mandible somewhat inflated, arched from base to point, 
overlaps under mandible slightly. Tarsus one inch long. 
Middle toe to end of claw 11 inch long. Wing to flexure 
4;inches long. Tail rounded, consisting of twelve feathers; 
- middle ones 4$ inches long, lateral ones 4 inches; first pri- 
mary shortest, fourth and fifth nearly equal and longest. 
Color. Head and.chin, extending down the sides of neck, 
and in a crescent across the upper part of breast, black; 
cheeks dark steel-grey. A line over eye from the base of the 
bill almost to hind head, throat, part of breast and chin, 
white. Nape, back, tail and outer barbs of primaries and 
secondaries yellow-olive, shafts dark brown. Breast, belly 
and thighs cinereous. Vent and under tail-coverts light bay. 
Bill black, legs brownish. 
Female, 93 inches long. Dark cinereous brown on head, 
cheeks, back, wings and tail. Line over eye, chin and throat, 
white. Upper part of breast and sides greyish, lower part of 
breast, flanks, abdomen and vent, light bay, darkest at vent. 
PICUS DUBIUS. Casor. 
The specimen from which this description is taken was 
shot near Uxmal, November, 1841. 
1 have named it dubius, because I at first thought it to be 
Picus Carolinus, and mentioned it as such in the Appendix 
to the second volume of Stephens’s “ Travels in Yucatan,” p. 
475; but when I compared the two birds, after my return to 
this country, my mistake was very evident, the Picus dubius 
being nearly an inch the longest, and having twice the num- 
ber of white bands, besides other differences. ; 
This bird is not uncommon in Yucatan, but, owing to the 
above-mentioned mistake, I procured but one specimen. í 
- Male, 93 inches long. Billli inch along ridge; 1; inch 
ong gape. Tarsus $ of an inch long. Tail 3j inches 
long, of ten feathers. First primary shortest, third and 
