52 Director's Annual Report. 
uniformity of color and size exhibited by it. A table showing the 
maximum, minimum and average measurements of the series is 
given, the measurements being in inches. ‘The culminicorn is 
measured from the anterior end of the nostril to the tip of the bill. 
EIGHT MALES. 
Wing Tail ‘Tarsus Toe Culmen D.of B. Culmini- 
corn 
Minimum ---- 10.85 5.20 [-30 1.80 Uo ity 255 .9O 
Average ------ II.04 HaQe 1.34 1.85 1AM 55 .gO 
Maximum .-.. I1.15 5.40 1.40 1.g0 Tes 58 .gO 
TWELVE FEMALES. 
Wing Tail ‘Tarsus Toe Culmen D.of B. Culmini- 
corn 
Minimum ---- I1.00 25 1.320 1.70 ite 17) 53 85 
Average ..-.-. [adres Tis Ree 1.34 1.82 ifgAil 55 .gI 
Maximum .--- I1.40 5.40 1.40 1.85 1.25 57 95 
The average length of both sexes is about 15.50. A June 
female of its nearest relative, .7’strelata pheopygia Salvin, from 
the Galapagos Ids., in the Museu:n’s collection, measures: wing 
11.85, tail 5.50, tarsus 1-45, toe 2.00, culmen 1.25, deptiiofiillzaa 
culminicorn .96. ‘The measurements of a series of birds from the 
Galapagos, as given by Rothschild (Avifauna of Laysan, etc., p. 
290), 1s ‘‘wing from 11.6 to 12.50, averaging from 11.8 to 12 inches, 
tail 5.8 to 6.3 and 6.4, metatarsus about 1.4 to 1.5.’’ 
It will be noted that the Museum’s specimens from the Gala- 
pagos, with the exception of the tail, falls well within the average, 
as quoted from Rothschild. The specimen may, therefore, be taken 
as a representative of that series. Since it is a June specimen, it 
is specially useful in comparison with the Molokai series. 
In comparison, it will be seen that in all maximum dimen- 
sions, the Hawaiian birds fall safely below the minimum given for 
the Galapagos series, but nowhere is this difference more notice- 
able than in the size and form of the beak. This difference, though 
marked, is difficult to describe, but it may be stated definitely that 
in sanxdwichensis the bill is much more slender, the nail more 
strongly deflected at the tip, and the nostrils thinner and less promi- 
nent. These differences are constant throughout the Molokai 
series. ‘The color characters are even more obscure. However, 
the slaty black terminal bands on three or four of the shorter 
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