120 Rldgwuii — New Forms of Oligomyodian Birds. 



4. Tltyra semifasr.iaia personata (Jardine and Selby). Central Honduras to 

 eastern Mexico. (This form is decidedly larger than either of the preceding, 

 has the adult male decidedly deeper gray (especially on upper parts), the 

 adult female most resembling thatof 7\ s. coMaricen.<<is from Panama but with 

 the general color of upper parts browner and color of pileum scarcely if at 

 all darker than that of back.) Specimens from Yucatan are decidedlj' 

 smaller and somewhat paler, the females averaging still more brown above 

 and may require separation. 



5. TiU/ra semifusc.iata griseiceps (Ridgway). Western Mexico. (Adult 

 males of this form are scarcely if at all different in coloration from those of 

 T. s. personata, some specimens of the latter from Honduras being precisely 

 similar, but average slightly deeper graj^ especially on the rump, upper 

 tail-coverts and hinder part of pileum, which are practically uniform with 

 the back ; but the adult females are exceedingly different, being even paler 

 and grayer than those of T.s. semifasciata, with the pileum paler and grayer 

 tlian the back instead of the reverse. Decidedly the largest form, T. s. 

 perwnata, coming next in size.) 



I am not at all sure that it would not be best in accordance with the 

 facts to separate, as additional subspecies, not only the Yucatan birds (from 

 T. s. ]>ersonala.) but also the Panama birds (from T. ,s. costaricensis) ; and it 

 is not unlikely the South American birds may in reality include one or 

 more subspecies in addition to those designated above. 



Platypsaris aglaise yucatanensis subsp. nov. 



Type, No. 130,02:^, U. S. Nat. Mus., adult male ; Yucatan ; G. F. Gaumer. 



Similar in coloration to P. aglaiie aglaix, of northeastern Mexico, but 

 smaller, with relatively larger bill (wing averaging 87.2 in male, 86.8 in 

 female, exposed culmen 17.2 in male, 17.4 in female, the corresponding 

 average measurements of P. a. aglaix being: Wing 94.8 in male, 93.9 in 

 female ; exposed culmen 16.3 in male, 16.6 in female). 



Yucatan. 



Lathria unirufa clara subsp. nov. 



Type, No. 53,767, U.S.Nat. Mus., adult male; Panama (Lion Hill sta- 

 tion ?) ; J. McLeannan. 



Similar to L. unirufa unirufa (of southeastern Mexico to Guatemala) but 

 general coloration decidedly clearer or brighter, inclining to dull cinnamon- 

 rufous above, the under parts clear tawny-ochraceous ; averaging decidedly 

 smaller. 



Nicaragua to northern Colombia. 



Lathria fusco=cinerea guayaquilensis subsp. nov. 



Type, No. 101,27!, U. S. Nat. Mus., adult; Guayaquil, western Ecuador, 

 1884 ; Dr. Wm. H. Jones, U.S. N. 



Similar to L. fusco-cinereafusco-cinerea (Lafresnaye), of Colombia, but gray 

 of under parts much more strongly tinged with buffy olive, under tail- 

 coverts much browner, and remiges darker; slightly smaller. 



Western Ecuador. 



