538 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
SPECIMENS COLLECTED 
1 ad. o’, Brazil, Serra Imeri, near Salto do Hud, Brazilian-Venezuelan border, 
December 5, 1930. 
1 ad. o, Brazil, Sio Gabriel, Rio Negro, Amazonas, January 17, 1931. 
lad. o&, Brazil, Cucuhy, Rio Negro, Amazonas, February 4, 1930. 
6 ad. o&, lim. o, lad. 9, 1 im. unsexed, Venezuela, Cerro Yapacana, Upper 
Orinoco, April 5-17, 1931. 
Two of the Venezuelan males have a slight greenish edging to the 
outer web of the outermost primaries of the left wing, but not of the 
right one. The male from Serra Imeri is considerably larger in all its 
dimensions than any of the others. 
Prior to the description of dispar, in his discussion of C. c. cyaneus, 
Hellmayr (Catalogue of the birds of the Americas, pt. 8, 1935, p. 254) 
noted that Brazilian specimens from south of the Amazon generally 
have shorter and slenderer bills than do more northern examples and 
suggested that if they were to be separated Cabanis’s name Arbelorhina 
brevipes was available for them. Although it was described as from 
‘Porto Cabello,’’ Venezuela, Hellmayr claimed that the type is really 
a Brazilian trade skin. The material I have seen from Brazil south of 
the Amazon (but not violacens Zimmer) averages longer in its bill 
measurements than does the present more northern series. The 
material at hand would tend to suggest that “‘Porto Cabello” may well 
have been the correct locality after all for brevipes. There seems, from 
all this divergence of views, to be more individual variation than can 
be reconciled to the recognition of brevipes as distinct, no matter which 
view of its type locus be accepted. Zimmer (Amer. Mus. Nov., No. 
1203, 1942, p. 8) has also found “too much overlap to permit the 
recognition of ‘brevipes’ .. .” 
As stated in the original description of dispar, which is definitely an 
intermediate race without strikingly distinctive characters, ‘“‘males 
from the Cassiquiare region of southwestern Venezuela agree with those 
of violacens in coloration and length of bill but have the wing as long 
as that of Guianan cyaneus. The females, furthermore, have a slight 
distinction in color from the Matto Grosso females. Since there is a 
fairly extensive area occupied by birds of this sort, it seems advisable 
to give the population a distinctive name.” 
CYANERPES CAERULEUS MICRCRHYNCHUS (Berlepsch): Srmall-billed Honeycreeper 
Coereba caerulea microrhyncha BeRuErscH, Journ. fiir Orn., vol. 32, 1884, p. 287 
(Bucaramanga, Colombia). 
SPECIMENS COLLECTED 
5 ad. o', 2 ad. 2, Brazil, Serra Imeri, Rio Maturacd’, November 28—-December 
4, 1930. 
1 ad. o, Brazil, Sio Gabriel, Rio Negro, Amazonas, January 1, 1931. 
2 ad. o', Venezuela, San Antonio, Upper Orinoco, March 2-9, 1931. 
Zad., #7, lim. #,6ad. 2,1lim. ?, Venezuela, Cerro Yapacana, Upper Orinoco, 
April 5-29, 1931. 
