BIRDS OF NORTH AND MIDDLE AMERICA. 859 



P[latypsaris] albiventris (not Iladrostomus albiventris Lawrence) Ridgwav, Man. 



N. Am. Birds, 1887, 325, part (Yucatan). 

 Platypsaris aglaise yitcatanensis Ridgway, Proc. Biol. Soc. "\Va.sli., xix, 190G, 120 



(Yucatan; coll. U. 8. Nat. Mus.). 



{Specimens from Cozumel and Holbox Islands.)a 



Hadrostornus sp.? SAL-\aN, Ibis, Apr., 1885, 191 (Cozumel I., Yucatan; crit.). 



Hadrostomus, species undetermined. Ridgway, Proc. U. S. Nat. M\is., viii, 1885, 

 572 (Cozumel). 



Hadrostomus aglaix (not Pachyrhynchus aglaise Lafrcsnaye) Sclateu, Cat. Birds 

 Brit. Mus., xiv, 1888, 335, part (Holbox I. and Cozumel I., Yucatan). — 

 Salvin, Ibis, 1889, 364 (Holbox I. and Cozumel I., Yucatan; crit.). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, ii, 1890, 121, part (Holbox I.; Coz- 

 umel I.). 



PLATYPSARIS HOMOCHROUS (Sclater). 

 ONE-COLORED BECARD. 



Adult male similar in coloration to that of P. aglaise. latirostris, 

 having no trace of red on throat, but ninth (abbreviated and con- 

 cealed) primary narrower and wing and tail shorter; adult female 

 differing from that of any form of P. aglaise or related species in hav- 

 ing the whole pileum rufous-bro^\ai or rufous-chestnut, like rest of 

 upper surface. 



Adult male. — Pileum and nape plam black, becommg dark sooty 

 grayish on forehead; hmdneck, back, scapulars, rump, and upper 

 tail-coverts slate color (the feathers somewhat darker centrally), 

 clearer or purer and somewhat lighter posteriorly; wings and tail 

 dull blackish slate, the middle and posterior lesser coverts, greater 

 coverts, and inner secondaries clearer slate color margined \\\i\\ 

 lighter slate color or slate-gray, the remiges narrowly edged with 

 paler slate-gray; under parts wholly pale slate-gray, very slightly 

 paler on cliin and upper tlii'oat, decidedly (but not conspicuoush') 

 paler posteriorly; axillars and under wing-coverts slate-gray; inner 

 webs of remiges edged with wliite basally, the wliite extendmg entirely 

 across on extreme basal portion; maxilla black or gra3ash black, 

 mandible paler (bluish gray in life ?) ; legs and feet dusky horn color 

 (bluish gray m life?); length (skms), 152-165 (158); wing, 87.5-88 

 (87.7); tail, 62-63 (62.5); exposed culmen, 16-17 (16.5); tarsus, 

 20-20.5 (20.2); middle toe, 13-13.5 (13.2).^ 



Adult female. — Above, including whole pileum, plain deep cinna- 

 mon to tawny-rufous, the primaries dusky edged with the general 



a I have not seen specimens from the islands mentioned, and therefore refer them 

 provisionally to this form. 

 b Two specimens. 



