158 



Bangs — Notes on Birds from Western Colombia. 



Neocrex colombianus Bangs. 



Neocrex colombianus Bangs, Proc. Biol. Sue, Washington, Vol. XII, 

 p. 171, Oct. 31 , 1898 — Palomina, Sierra Nevada de Santa Marta, Colombia. 



Neocrex uniformis, Hartert, Nov. Zool. VIII, p. 369, Oct. 5, 1901— 

 western Ecuador. 



One adult male from San Antonio, western Colombia, December 2, 

 L907, is quite like my type in every respect except that the In-own of back 

 and wings is just a trifle darker, more olivaceous, the difference probably 

 being seasonal, the type of Neocrex colombianus having been taken May 22. 



I can find no character in Hartert's description of his birds from west- 

 ern Ecuador that does not apply also to my Colombian examples, and 

 feel sure that in Neocrex uniformis he simply redescribed Neocrex colom- 

 bianus. 



Aulacorhamphus petax sp. nov. 



Type from San Antonio, Rio Cali, western Colombia, altitude 5,800 feet, 

 adult <?, No. 20570, coll. of E. A. and O. Bangs. Collected Nov. 5, 1907, 

 by M. G. Palmer. 



Characters. — Similar in general to A. albivittus ( Boiss. ) but throat blue 

 instead of grayish white. The bill of the new form is similar to that of 

 A. albivittus, with a dark chestnut base to lower mandible followed by a 

 broad white band which extends across both mandibles. There is, how- 

 ever, present in both specimens of the new form, a white band across ex- 

 treme base of culmen which I do not find in any of the examples of 

 A. albivittus examined. 



The new form, which maybe a western subspecies of A. albivittus, needs 

 close comparison with no other member of the genus. From the other two 

 species having blue throats, A. cseruleigularis Gould of Costa Pica and 

 Panama, and A. cyanolsemus Gould of western Ecuador, it differs in 

 having chestnut at base of lower mandible and in the shade of the throat 

 which though blue is paler than in either of these. A. hiatus Bangs of 

 the Sierra Nevada de Santa Marta, Colombia, another member of this 

 group of the genus, has the base, of the lower mandible anterior to the 

 white band wholly black, the black portions of culmen more extensive 

 and yellow portions more restricted, the white band across sides of upper 

 mandible bordered behind by yellow and the throat bluish gray. 



MEASUREMENTS. 



Premnoplex brunnescens (Scl. ). 



One adult 9 Premnoplex brinniesceus from San Antonio, appears to 

 represent the typical form originally described from Bogota, agreeing with 

 Sclater'fi description and [date, and it appears to me that apart from 



