PACHYRHAMPHVS. 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. Sab. Tres Marias Islands, western Mexico. 



P. insularis Eidgw. Grayson's Becard. 1 

 V. 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, 

 scapulars, 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 6.50-6.75, wing 3.40- 

 3.65, tail 2.70-3.00, exposed culmen .58-65. Sab. Western and 

 southern Mexico (Mazatlan to Yucatan). 



P. albiventris Lawk. Xantus's Becard. 2 

 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. Sab. 

 Nicaragua and western Costa Eica. 



P. latirostris (Bonap.). Gray-throated Becard. 3 



Genus PACHYRHAMPHUS Gray. 4 (Page 323, pi. XCV., fig. 2.) 



Species. 



a 1 . 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 Hadroatomua albiventris Lawe., Ann. Lye. N. T. viii. 1867, 475. (Sixteen specimens examined.) 



3 Pachyrhamphua latiroatris Bonap., Compt. Rend, xxxviii. 1854, 658. 



* Pachyrhamphua Gray, List Gen. B. 1838, 41. Type, Pachyrhynchua cuvieri Spix, = Tityra viridia 

 VlEILL. 



