2q8 Palmer, A Petrel Ncvj to North America. [july 



feathers almost entirely brown ; all irregularly tipped with the dark body 

 color, and all having brown shafts. Rectrices entirely brown, paler at 

 base, and sometimes having (except central pair) the base white for a short 

 distance. Outer toes slightly shorter than the middle. Toe nails long 

 and narrowish. 



Oceanodroma cryptoleucura. Knudsen's Petrel. 



Similar to O: leucorhoa in size, color and marking, but with slightly 

 forking tail. Upper tail-coverts pure white, the longer feathers broadly 

 and sofnezvhat evenly tipped with the dark body color; all having the 

 shafts -white. Rectrices (except central pair) white at base ior fully an 

 inch and extending further along outer webs of the outer pair. Outer 

 toes decidedly ?,hor\.QY than the middle. Toe-nails shorter :ind broader. 



Measurements, from Ridgtvays Manual. 



Wing. Tail. Forking. Tarsi. 



O. leucorhoa 6.00-6.30 3.50-4.00 .80-.90 ■90--f)S 



O. cryptoleucura 5.S0-6.30 3.00-3.15 .20-.30 .85-. 90 



Measurements of the Washitigton Specimens. 



3233 $ W. P. Coll. 6.20 2.94 .12 • .90 



3234 ? " 6.00 2. 85 .15 .90 



Length of No. 3234, 7.75 ; extent, 19.10. 



The greater amount of white at the base of the tail-feathers, 

 the broad dark tips of the upper tail-coverts, and the slightly 

 forked tail will readily serve to identify this species. The 

 Hawaiian Islands, Galapagos and Washington birds agree well in 

 these characters. 



Both my specimens are molting and seem to be adults and are 

 both females. In both the bulk of the feathers have been changed 

 except on the neck and throat. The wings in both have been 

 entirely renewed, the outer pair of feathers in each showing 

 remains of the sheaths at their bases. In one, No. 3234, the tail 

 has been entirely renewed, no remains of the sheaths showing ; 

 while in the other but nine feathers are full grown, the next to 

 the outer pairs being rather more than two thirds their full length, 

 and the fourth on the right side is nearly half grown. Some of 

 the upper tail-coverts lack their full growth on both. 



The capture of one of these specimens came about in a rather 

 peculiar way for a Petrel. The first was received from a boy who 



