March 19 ate soem STH 7 ee 99 
1908 BANGS — COSTA RICAN BIRDS 99 
In ‘Birds of North and Middle America,’ Part II, p. 121, Ridg- 
Way gave average measurements for Guatemalan specimens, that 
are too small. ‘This was done because he included no. 146,574, 
U.S. Nat. Mus. coll., from Guatemala, marked on the label as a 
male, in his averages. ‘This skin affords the following measure- 
ments: wing, S4.; tail, 76.; tarsus, 20.5; exposed culmen, 16. mm. 
I feel sure the sex was wrongly determined and that it is a female. 
All undoubted males from Guatemala are quite as large as those 
from southeastern Mexico, and Honduras specimens are only a 
trifle smaller. 
Some ornithologists may not agree with me as to the advisability 
of separating subspecies on differences of size alone, but it is being 
done more and more as time goes on, and in this particular case it 
seems justifiable. Here we have the extreme northern form bear- 
ing one name, and the extreme southern, the other. Each has a 
well-defined range, and the difference in size is well marked. No 
northern individual, in the large number examined, is as small as 
the average of the southern series, and it seems to me better to have 
a name for the little southern bird, rather than to have to repeat 
every time we mention it, that it is much smaller than true P. 
sanguinolenta of southeastern Mexico and Guatemala. 
Chlorospingus zeledoni Ride. 
At my special request Mr. Underwood secured as large a series 
of the black-capped chlorospingas on Irazi, on his last trip, as 
time would allow, taking forty-six specimens. Of these, nine are 
referable to the bird lately named C. zeledoni by Ridgway. There 
is no doubt that this latter is a fine, distinct species. In the present 
series there is not a single skin that could in any way be called 
intermediate. Some three or four examples are in color (nearly 
wholly gray beneath, and with very dull grayish olive-green backs) 
like the skin from Turrialba, doubtfully referred to C. zeledoni by 
Ridgway, and this phase of plumage I take to merely represent the 
extreme of the species. 
While occurring with C. pileatus on both Irazi and Turrialba, 
