32 Proceedings of the Biological Society of Washington. 



Myiohius xanthopygus villosus Ridgway, Bull. U. S. Nat. Mus., No. 50, 

 IV, 1907, 488, part (diag.; references; crit.). — Bangs, Proc. New Eng- 

 land Zool. Club, IV, 1908, 27, in text (crit.; range). 



Myiohius sulphureipygius villosus von Berlepsch, Ornis, XIV, 1907, 481, 

 (crit.). — Hellmayr, Proc. Zool. Soc. London, 1911, 1136, part (range). 



Description. — Male: above dark olive green, the pileum more or less 

 suffused with Brussels brown, and with a large median vertical spot or 

 stripe (partially concealed) of lemon chrome; rump Martins yellow; upper 

 tail-coverts and tail black; wings dusky brownish, the coverts and remiges 

 edged externally with medal bronze, the inner margins of the remiges 

 buffy; under surface orange citrine, brightest on the breast and sides, the 

 throat yellowish, and the middle of the abdomen barium yellow; "iris 

 brown; feet grayish brown; bill black, flesh color below." Female similar 

 to the male, but lacks the yellow vertical spot, the pileum being Brussels 

 brown with a dark olive green wash. 



Measurements. — Male (three specimens): wing, 70-71; tail, 60-61; 

 bill, 11.5-12; tarsus, 18. Female (four specimens): wing, 66-68 (67); 

 tail, 56-61 (58); bill, 11-12 (11.5); tarsus, 16-18 (17). 



Range. — Andes of Colombia and Ecuador, in the Subtropical Zone. 



Remarks. — Myiohius villosus is the Subtropical Zone representative of 

 M. sulphureipygius, as conclusively shown by Dr. Chapman. It differs 

 from the latter in its larger size and generally darker coloration, the yellow 

 below being more restricted and the ochraceous more extended. Nearly 

 all the specimens examined show an indistinct dusky mottling on the lower 

 parts, from the breast down. Although closely related to the form of the 

 Tropical Zone living immediately below, intergradation apparently does 

 not take place, and it should be accorded specific rank. Sclater's type came 

 from Nanegal, in western Ecuador, while a second specimen purported to 

 have come from the Rio Napo, in eastern Ecuador — almost certainly an 

 erroneous locality. We have not yet seen any specimens from western 

 Ecuador, but there is every reason to believe that skins from western 

 Colombia are the same. Dr. Chapman calls attention to the peculiarities 

 of a "Bogotd," skin in the American Museum Collection (No. 42704). 

 This specimen agrees closely with No. 59984, Collection Carnegie Museum, 

 from Rio Negro, Colombia, and the two together differ from the remainder 

 of the series in their brighter coloration below. Two forms are thus indi- 

 cated, from the Eastern and Western Andes respectively, but it will be 

 wise to await the receipt of additional material before formally character- 

 izing them. The Peruvian birds, however, are undoubtedly distinct, and 

 are described beyond. The present bird is not nearly so common or well 

 known as the forms of this group from the Tropical Zone, nor, indeed, as 

 many other Subtropical species. 



Specimens examined. — Colombia: Rio Negro, 1; "Bogotd, " 1; Cocal, 

 Cauca, 1; Ricaurte, Narino, 2; near Pavas, 2. Total, 7. 



Myiohius villosus peruvianus, subsp. nov. 



Myiohius villosus (not of Sclater, 1860) Sclater and Salvin, Proc. Zool. 

 Soc. London, 1879, 615 (Tilotilo, Yungas, Bolivia). — Taczanowski, 



