570 Bulletin American Museum of Natural History. [Vol. XXXVI, 



(3892a) Arremonops conirostris inexpectata Chapm. 



Arremonops conirostris inexpectata Chapm., Bull. A. M. N. H., XXXIII, 1914, 

 p. 184 (Andaluoia, w. slope, Cen. Andes, 3000 ft.). 



Char, suhsp. — Similar to A. c. conirostris but wing shorter; in general color of 

 the body resembhng conirostris, but breast paler and supraloral stripe whiter, wings 

 and tail more nearly like those of A. c. chrysoma, the shoulder bright lemon-chrome, 

 the wing-quills, including the outer primary, margined externally with yellowish 

 increasing in brightness from within outwardly. Average, three males, wing, 69; 

 taU, 66; one female, wing, 66; tail, 63 mm. 



In view of the stability shown by Arremonops conirostris conirostris 

 through a wide area, the appearance of this form so near the type-locahty 

 of that race is surprising and inexphcable. Specimens of conirostris from 

 Honda, at the western base of the Eastern Andes, agree minutely in color 

 and size with others from the eastern base of the same range, though these 

 areas are separated by three life-zones making actual contact impossible. 



Nevertheless, within the same river valley, and in the same faunal area, 

 this well-marked race, the characters of which are supported by eight adults 

 and five juvenal specimens, occurs. In no other instance have we found 

 birds common to both Honda and the region west of and below Andalucia, 

 to differ geographically from one another, and one is led to believe that pos- 

 sibly inexpectata is not strictly a geographical variant of conirostris, or at any 

 rate has had its origin from some other source than the Honda region. The 

 bird's resemblance to chrysoma of western Ecuador should be considered in 

 this connection, and the apparent isolation of the latter form is also of sig- 

 nificance. Possibly like some other birds from the Upper Magdalena at 

 Andalucia, it has crossed from the eastern to the western side of the Andes 

 at this point. Miller, however, sends no specimens of Arremonops from the 

 Caqueta region. 



Andalucia (w. slope, 3000 ft.) 13. 



(3893) Arremonops conirostris chrysoma (ScL). 



Embernagra chrysoma Sol., P. Z. S., 1860, p. 275 (Babahoyo, Ecuador). 



The range of this race, heretofore known only from western Ecuador, is 

 now extended to southwestern Colombia through Richardson's capture of 

 six specimens. No form of Arremonops has been recorded from the Pacific 

 coast of Colombia north of Tumaco, but the species appears again in Pan- 

 ama and Central America as A. chrysoma richmondi. This form differs from 

 chrysoma mainly in having the back and tail with a brownish tinge, the wings 

 externally less yellowish. It agrees with chrysoma, and thereby differs from 



