PACHYRHAMPHUS. 325 
form deep ash-gray. Adult female: Top of head dull slate-gray 
(but little darker than back of male), becoming lighter and more 
brownish on forehead; back, scapulars, and upper part of rump 
uniform brownish gray ; collar across hind-neck, lower rump, and 
upper tail-coverts pale tawny, tinged with gray; lower parts buffy, 
nearly white on chin, but much deeper (almost tawny) on ear- 
coverts. Length about 6.70, wing 3.40-3.50, tail 2.75-2.80, exposed 
culmen .52-.55. Hab. Tres Marias Islands, western Mexico. 
P. insularis Rip@ew. Grayson’s Becard.} 
6. Adult males with breast, belly, flanks, etc., buffy whitish or very pale gray- 
ish, sometimes nearly pure white. 
Adult male: Above similar to P. insularis, but back, etc., decidedly 
lighter, more ashy, gray. Adult female: Top of head slate-black 
posteriorly, gradually passing into ash-gray on forehead; back, 
secapulars, and rump dull brownish gray or grayish brown, the 
wings and tail more rusty ; usually a more or less distinct collar of 
dull ochraceous across hind-neck; lower parts varying from deep 
ochraceous-buff to buffy white. Length about 6.50-7.00, wing 3.40- 
3.68, tail 2.70-3.00, exposed culmen .58-.65. Hab. Western and 
southern Mexito (Mazatlan to Yucatan) and north to southern 
ATIZONA........eeeeee 441.1. P. albiventris Lawn. Xantus'’s Becard.’ 
a, Adult males without rose-colored patch on chest or throat; adult females with 
upper parts, except top of head and tips of quills, uniform clear tawny rufous. 
Adult male: Top of head slate-black, deeper and somewhat glossy poste- 
riorly, duller and more slaty on forehead; rest of upper parts uniform 
slate-gray ; lower parts uniform ash-gray, rarely paler and very slightly 
tinged with rosy on chest. Adult female: Top of head dark slaty, in 
very abrupt and conspicuous contrast with rufous of back; lower parts 
pale buffy, paler (sometimes nearly white) on belly and chin. Length 
about 6.25, wing 3.50-3.70, tail 2.60-2.85, exposed culmen .62-.65. Hab. 
Nicaragua and western Costa Rica. 
P. latirostris (Bonap.). Gray-throated Becard.$ 
Genus PACHYRHAMPHUS Garay.‘ (Page 323, pl. XCV., fig. 2.) 
Species. 
a’. Wings and tail parti-colored ; sexes very different in color. Adult male: Top of 
head glossy blue-black; hind-neck, lower back, rump, and upper tail-coverts 
uniform ash-gray; back glossy black superficially, but feathers ash-gray be- 
neath the surface; scapulars mostly white; wings black, with white tips to 
1 New species ; three specimens examined. 
2 Hadrostomus albiventrie Lawr., Ann. Lye. N. Y. viii. 1867, 475. (Sixteen specimens examined.) 
3 Pachyrhamphus latirostris Bonxar., Compt. Rend. xxxviii. 1854, 658. 
4 Pachyrhamphus Gray, List Gen. B. 1838, 41. Type, Pachyrhynchus cuviert Spix, = Tityra viridis 
VIEILL, 
