1906. 



NATURAL SCIENCES OF PHILADELPHIA. 



189 



ever, does not need special comparison with any further forms of the 

 genus, even those possessing feathered tarsi. 



Two adults from Pulo Jimaja, Anamba Islands, are somewhat less 

 brownish above, as well as very slightly darker below, but nevertheless 

 agree in all details of coloration quite closely with the birds from the 

 Seychelles Islands, and differ thus quite remarkably from Collocalia 

 fuciphaga fuciphaga, by whose range the Anamba Islands are pretty 

 well surrounded. In all measurements excepting that of the wing 

 these two specimens exceed the measurements of fuciphaga and equal 

 or even surpass those of elaphra; but the wing-quills are molting and 

 not fully grown, and there are indications from the relative length of 

 the primaries that the length of the wing would have become when 

 perfect almost if not quite as great as that of elaphra. In light of pre- 

 sent knowledge, therefore, it seems best to refer to elaphra, with the 

 above explanation, these two examples from the Anamba Islands, 

 even though by so doing elaphra presents an anomalous geographical 

 distribution. Should, however, a satisfactory series show the Anamba 

 bird to be really much smaller than that from the Seychelles Islands, 

 and reasonably constant in its slight color differences, it ought 

 probably to be separated subspecifically. 



Measurements of two adults of Collocalia fuciphaga elaphra are here 

 given : 



Collocalia brevirostris (McClelland). 



Hirundo brevirostris McClelland, Proc. Zool. Soc. Lond., 1839, p. 155. 



Chars, sp. — Similar to Collocalia fuciphaga fuciphaga, but much 

 larger; tail less deeply emarginate; and rump noticeably lighter than 

 the very dark back. 



Wing, 124-127; tail, 55-59; exposed culmen, 5.5; tarsus, 10 mm. 



Type locality. — Assam. 



Geographical distribution. — Himalaya Mountains from Dalhousie, 

 about 76° east longitude, east through Nepal and Sikhim to Assam 

 and Manipur. 



This form has been until comparatively recent years usually consid- 



i^Type. 



