116 Ridgivay — Neiv Forms of Oligomyodkin Birds. 



This bird may possibly be the same as R. ((ssiinllis Pelzeln (Orn. Bras., 

 ii Abtli., 1869, 181), from Engenho de Gama, San Vicente, Borlja, Rio 

 Negro, and Barra, northern Brazil, but without a specimen of the latter for 

 comparison it is impossible to be sure whether the two are identical or not. 



Mionectes olivaceus venezuelensis subsp. nov. 



Type, No. 70,345, Am. ^NIus. Nat. Hist., adult female, Guacharo, Vene- 

 zuela, December 14, 1898; F. W. Urich. 



Similar to ^f. olivaceus olivaceus, of Costa Rica and Panama, but larger 

 (adult female averaging wing 67.8, tail 52.5, exposed eulmen 13.5, instead 

 of 63.3, 45.9, and 12.5 respectively), and throat more broadly and more 

 distinctly streaked. 



Venezuela. 



Elsenia frantzii stolzmanni subsp. nov. 



Type, No. 88,441, U.S. Nat. Mus., adult female, Tambillo, northern Peru, 

 September 11, 1877 ; F. Stolzmann. 



Similar to E. frantzii frantzii but upjier parts browner and .slightly darker 

 and under parts much more strongly yellowish (al)domen and median 

 portion of breast between straw yellow and sulphur yellow). 



Northern Peru (Tambillo). 



Although identified by Count von Berlepsch as E. obscura (Lafresnaye 

 and D'Orbigny), the specimen mentioned above is very different from any 

 of the several specimens of that species in the National Museum collection 

 and is much nearer E. frantzii. It is very slightly larger than any female 

 of the latter of the series measured in length of wing and tail, which are 

 81 and 72.5, respectively, the maximum of E. frantzii (thirteen females) 

 being 80.5 and 71. 



Myiarchus ferox actiosus subsp. nov. 



Type, No. 198,632, U. S. Nat. Mus., adult male ; Pigres, at mouth of Gulf 

 of Nicoya, Costa Rica, March 6, 1905 ; R. Ridgway. 



Similar to .U. ferox panamensis (Lawrence) but color of back, etc., darker 

 and duller olive, hindneck, sides of neck, and sides of head purer gray, and 

 yellow of under parts paler; still more like ^f.f. plucocephalus (Sclater), of 

 western Ecuador, and scarcely to be distinguished excejit for paler yellow 

 of under parts. 



Pacific coast of Costa Rica. 



Megarynchus pitangua caniceps subsp. nov. 



Type, No. 126,595, U. S. Nat. Mus., male ad., Barranca Veltran, southern 

 Jalisco, March 25, 1892 ; P. L. Jouy. 



Similar to M. pitangua mexicanus but pileum sooty gray or deep mouse 

 gray instead of blackish, and color of back, etc., much grayer olive. 



"Western Mexico. 



