138 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



LEPTOPOGON AMAUROCEPHALUS ICASTUS Oberholser. 



Leptopogoii (tmaiiron-plialii.s icustns Oheuiioi.skk, Vvov. Biol. Soc. Washington, 

 XIV, 1901, p. 187. 



C/iars. sithsj). — Similar to Leptopogon amaurocephalus trlsth^ but 

 larger, crown more brownish, the anterior lower surface less purel}' 

 yellow, and the wing-bands pale ochraceous instead of pure yellow. 



Description. — Type, adult male. No. 173405, IT.S.N.^VI.; Sapucay, 

 Paragua}', July 23, 1900; William T. Foster. Crown and occiput 

 olive brown, but little darker than the pure olive green of the remainder 

 of the upper surface, and into which it almost insensibly passes on the 

 nape; upper tail-coverts slightly more brownish than the back; tail 

 fuscous, edged with olive green; wings sepia brown, the remiges mar- 

 gined externally with olive green, internally with buff, the lesser 

 coverts olive green, the others edged with the same, the median and 

 greater series with broad tips of pale ochraceous, forming two well- 

 defined wing-bands; lores and orbital region broAvnish white, mixed 

 with olive brown; cheeks mingled greenish, brownish, and whitish; 

 auriculars anteriorly brownish white, posteriori}- deep olive brown, 

 this forming a conspicuous patch; sides of neck grayish olive green; 

 chin and upper throat grayish white, washed with olive yellow; rest 

 of ventral surface sulphur yellow, much shaded with olive green on 

 jugulum, breast, and sides; lining of wing sulphur yellow, the bend of 

 wing tinged with, ochraceous; bill brownish black, the basal half of 

 mandible dull white. "Iris brown." Length of wing, 69 mm.; tail, 

 63mm.; exposed culmen, 11 mm.; tarsus, 16 mm.; middle toe, 9 mm. 



This apparently new form is perhaps nearest LrpfojxK/oii (iinavro- 

 ceplialus ammrrocephalus., from which, however, it ditiers in its some- 

 what larger size, less ochraceous wing-bands, and paler, nmch less 

 brownish, less well-delined cap. 



Dr. Allen ^ is seemingly quite right in asserting the close relation- 

 ship of Leptopogon amaurocephalus, L. a. plleatus., and L. a. trlstli^, 

 and considering them simply as geographical forms of one wide- 

 ranging species. Zeptopogo?) a. plleatus may easily be distinguished 

 from true aiuaurocrphaJus by its darker, more ochraceous lower surface, 

 more yellowish green upper parts, and warmer brown pileum. 



ORCHILUS AURICULARIS (Vieillot). 



Platyrhynchos (wriciilarifi Yikillot, Nouv. Diet. d'Hist. Nat., XXVII, 1818, p. 16. 

 Ordiilus auricuhiris Cabanis and Heine, Mus. Hein., II, 1859, p. 51. 



A single example is like one from Brazil, except for rather darker, 

 richer colors above as weix as on sides of head and neck. The latter, 

 however, may possibly be a female. ""'Iris brown.'' 



iBull. Amer. Mus. Nat. Hist., IV, 1892, p. 334. 



