KORTH AMERICAN BIRDS. 



c'. Wing less than 7.00. 



d}. Tarsus decidedly longer tban middle toe, with claw; tail niiicli 

 rounded, or slightly graduated; plumage wholly dusky. 



Halocyptena. (Pago 69.) 

 <P. Tarsus not longer than middle toe, with claw ; tail emarginato, 

 even, or at most only verj- slightly rounded, 

 e". Tail even, or very slightly rounded ; tarsus twice as long as 

 the culmen ; color uniform dusky, with white upper tail- 

 coverts Procellaria. (Page 69.) 



e'. Tail emarginate or slightly forked ; tarsus less than twice as 

 long as the culmen ; color variable. 



Oceanodroma. (Page 70.) 

 Secondaries 10. (Subfamily Oceamtincc.') 

 I?. Tarsus exceeding middle toe, with claw, by less than the length of the bill 

 (measured from forehead) ; basal division of middle toe shorter than 

 rest of toe, including nail. 

 c'. Culmen (from frontal feathers) less than half as long as middle toe, with 

 claw. 

 d}. Front of tarsus distinctly scutcllate ; distance from tip of tail to 

 end of longest upper coverts shorter than middle toe ; first quill 

 shorter than third; lower parts white, forward to the chest; 



no white on upper parts Garrodia} 



d^. Front of tarsus not scutellate ; distance from tip of bill to end of 



longest upper coverts much greater than length of middle too 



with claw ; lower parts dusky, or striped with dusky ; ujiper 



tail-coverts white. 



e'. Claws narrow, pointed ; first quill much shorter than third; 



belly and flanks uniform dusky... Oceanites. (Page 71.) 



e'. Claws broad, flat, blunt ; first quill longer than third ; bellj' 



and flanks white striped with dusky Pealca* 



<^. Culmen (from frontal feathers) more than half as long as middle too, 

 with claw ; tarsus 2J times as long as culmen, appreciablj^ scutel- 

 late in front ; nails broad, flat, and blunt ; first quill much shorter 



than third Pelagodroma. (Page 72.) 



6'. Tarsus exceeding middle toe by more than the length of the culmen ; basal 

 division of middle toe longer than rest of toe, including nail; culmen 

 (from frontal feathers) more than half as long as middle toe, with claw; 

 tarsus 2} times as long as culmen, the anterior scutellio sometimes ap- 

 preciable, sometimes obsolete ; nails excessively broud (nearlj' as broad 

 as long), flat, triangular; first quill decidedly shorter than third. 



Cymodroma. (Page 71.) 



' (Inrrodln FoRBES, P. Z. 8. ISSl, 7.16. Type, Prncellnna nereiH GoiTLD. 



' Peatea KlDOW., Auk, iii., July, 18S8, 334. Xyjie, Tnala«eidroma lineata Peale. 



