3. OCEANODROMA. 351 



m,. Ad. sk. [Australia.] Sharpe Coll. 



n. Sternum. Desertas. W. R. Ogilvie-Grant, 



Esq. [P.]. 



3. Oceanodroma macrodactyla. 



Oceanodroma leucoirhoa, W. E. Bryant, Bull. Calif. Ac. Sc. ii. 



p. 276. 

 Oceauodroma leucorrhoa macrodactyla, W. E. Bryant, Bull. Calif. 



Ac. Sc. ii. p. 4o0. 

 Oceanodroma macrodactyla, A.O.U. Check^list N. Am. Birds, 1889, 



p. 12, no. 106. " 



">S^>. char. Similar to 0. leucorrhoa (Vieill.), but with much longer 

 and more deeply forked tail, larger feet, shorter bill, and very broad 

 dusky tips to the upper tail-coverts. 



" Achdt male (No. 2566, coll. AValtcr E. Bryant, Guadalupe I., 

 March 1886 : W. E. B.). Head, neck, and back dark sooty greyish, 

 paler on anterior portion of head, the forehead tinged with brown, 

 darker and inclining to smoky plumbeous on hind head, hind neck, 

 and back; rump similar to back but darker; middle portion of 

 lesser wing-covert area and uppermost lesser, middle, and greater 

 wing-coverts dull sooty blackish : greater and middle wing-coverts, 

 tertials, and anterior portion of lesser wing-covert area pale greyish 

 brown or drab ; remiges (except tertials), primary-coverts, and alula 

 dull black; upper tail-coverts white, broadly tipped with dull 

 blackish, these blackish tips very sharply and regularly defined and 

 nearly 0-60 of an inch in extent on longest feathers ; tail dull slate- 

 blackish. Lower parts (except chin aud throat) uniform deep 

 greyish brown, the axillars similar but more greyish ; under wing- 

 covcrts light greyish brown. Bill and feet entirely black. Length 

 (skin) 8-40 inches, wing 6-40, tail 3-90 (forked for 1-00), culmen 

 0'6U, bill from anterior end of nasal tubes 0-38, tarsus 0-93, middle 

 toe with claw 0-93, outer 0-98. 



" Hah. Guadalupe Island, Lower California. 



" This fine species is very distinct from 0. leucorrhoa, from which 

 it is at once distinguished by its longer and much more deeply forked 

 tail, with narrower and more tapering lateral feathers; much 

 larger feet, shorter bill, and certain very decided diiferenccs of 

 coloration. Of the last, the most obvious character consists in the 

 very broad and sharply defined blackish tips to the upper tail- 

 coverts, reducing the white to a narrow curved or crescent-shaped 

 band, about 0-40 of an inch wide. The black is also appreciably 

 more strongly tinged with slaty, and the underparts are somewhat 

 darker. 



" The blackish tips of the upper tail-coverts recall 0. cryptoleuciira, 

 Ridgw., of the Sandwich Islands ; but the latter is small, has the 

 tail very much shorter and so little forked as to be almost trun- 

 cated, and the coloration of the wings much more uniform, while 

 the feet are even smaller than in 0. leucorrhoa." 



The above description and note were sent me by Mr. Ridgway, 

 who compiled them from one of the types. There is no specimen in 

 the British Museum Collection. 



