roDD: Seventeen Nem Neotropical Birds. 209 



•pecific characters. — Similar to Myiochanes ardosiacus ardosiacus 

 (Lafresnaye) of Colombia, Ecuador, etc., bul under parts avei 

 paler and duller, the chin, upper throat, abdomen, and under tail- 

 coverts inclining to whitish, sometimes almost pure white, and the 

 outer web <^i the outer rectrices conspicuouslj margined with white. 



Measurements of type. — Wing. 88 mm.; tail, 72; exposed culmen, 15; 

 tarsus, 13.5. 



Remarks. — After examining a fair series of this interesting species 

 I am satisfied that the differences above pointed out are geographical 

 in their nature, and not due to either age or season. Immature birds 

 of both forms, indeed, have the wing-coverts more or less tipped with 

 whitish or buffy, but the subspecific characters still obtain. It is 

 further significant that of two individuals from the Paramo de Rosas, 

 taken at an elevation of between seven and eight thousand feet, one is 

 perfectly typical of M. a. ardosiacus, while the other is intermediate. 

 1 fence I infer that the form here described is characteristic of the lower 

 altitudes in northern Venezuela, but am unable to define the exact 

 limits of its range. None of the specimens of this species which I have 

 examined in this connection from Colombia, Ecuador, and Bolivia 

 show any approach to polio pi il us in their characters. Lafresnaye's 

 type was a "Bogota."' skin, and as he was careful to state that it had 

 no white on the parts which are of that color in Sayornis nigricans, 

 there can be no doubt as to the application of his name. 



The present subspecies is based on five specimens from Lagunita de 

 Aroa and one from La Cumbre de Valencia, Estado Lara, Venezuela. 



Myiodynastes chrysocephalus cinerascens subsp. nov. 



Type, Xo. 37,168, Collection Carnegie Museum, adult male; 

 Paramo de Rosas, Estado Lara, Venezuela, March 7, 191 1; M. A. 

 Carriker, Jr. 



Subspecific characters. — Similar to examples of Myiodynastes 

 chrysocephalus chrysocephalus from the Santa Marta district of 

 Colombia and lower altitudes in northern Venezuela, but entire upper 

 parts much grayer, the back with little greenish tinge, but instead 

 nearly concolorous with the crown: superciliaries pure white, with no 

 buffy tinge; crown-patch pure citron-yellow, with no orange tinge; 

 under parts less distinctly streaked, and decidedly paler, with less 

 buffy suffusion on the throat, the abdomen being much paler yellow 

 (between primrose- and sulphur-yellow) fading to pure white on the 

 under tail-coven -. 



