1915.] Chapman, New Colombian Birds. 655 
Cyanerpes cyaneus pacificus subsp. nov. 
Char. subsp.— Similar to C. c. cyaneus (Linn.) but male with the turquoise 
crown-cap slightly darker, bluer in color and smaller in area, the blue band of the nape 
correspondingly wider, the inner margins of the wing-quills and under wing-coverts 
pale citron-yellow rather than canary-yellow; female darker, less yellowish green 
above, the under wing-coverts and inner margins of wing-quills much paler than in 
the female of cyaneus, straw-yellow rather than canary-yellow. More closely related 
to Cyanerpes cyaneus gigas (Bangs & Thayer) of Gorgona Island off the Colombia 
coast, which it resembles in the pale wing-lining, but wings and tail averaging longer, 
blue of the male less purple, particularly on the rump, the female not so dark above 
or so yellow below. 
T'ype.— No. 118227, Barbacoas, Dept. Narino, Colombia; < ad., Sept. 1, 1912; 
W. B. Richardson. 
Remarks.— When ‘Thayer and Bangs described Cyanerpes gigas from 
Gorgona Island (Bull. M. C. Z., XLVI, 1905, p. 96) no form of Cyanerpes 
cyaneus had been recorded from the Pacific coast of South America and the 
occurrence of a representative of this species on an island off southwest 
Colombia was most unexpected. The species, however, appears to be not 
uncommon, at least from Buenaventura southward, and the form occupying 
this area, in its somewhat greater dimensions and darker female, approaches 
gigas, but the male of pacificus agrees in the color of the blue parts with the 
male of cyaneus and does not therefore show the more purplish color which 
distinguishes the type of gigas. The type of gigas, which, thanks to Mr. 
Bangs, I have examined, is, however, not fully adult and its comparatively 
deep purplish blue may be due to immaturity. But this theory is not 
supported by an examination of specimens of Cyanerpes cyaneus cyaneus 
in plumage corresponding to that of the type of gigas, since in them the blue 
areas appear to be of the same shade as in the adult. 
The differences in color and size between the females of pacificus and 
gigas are constant in five specimens of the former and one of the latter 
examined. Both forms agree and differ alike from true cyaneus in their 
much paler under wing-coverts and wing-lining, though the high humidity 
of the region they inhabit, with a rainfall probably not equalled by that of 
any other part of South America would lead one to look for intensification 
rather than a reduction in the color of the forms which characterize this 
area. | } 
For a species which has not heretofore been recorded from the Pacific 
coast of South America the number of specimens of this form of Cyanerpes 
cyaneus here described which we have collected in that region, indicates 
how much work remains to be done even in the parts of South America 
which we consider fairly well explored, before we can claim an approxi- 
