56 NORTH AMERICAN BIRDS. 
ce. Wing less than 7.00. 
d@'. Tarsus decidedly longer than middle toe, with claw; tail much 
rounded, or slightly graduated; plumage wholly dusky. 
‘ Halocyptena. (Page 69.) 
d. Tarsus not longer than middle toe, with claw; tail emarginate, 
even, or at most only very slightly rounded. 
é. Tail even, or very slightly rounded; tarsus twice as long as 
the culmen; color uniform dusky, with white upper tail- 
COVEY TB. ...scseeeeceeceecsensseeeeseseseees PrOCEllaria. (Page 69.) 
e. Tail emarginate or slightly forked; tarsus less than twice as 
long as the culmen; color variable. 
Oceanodroma. (Page 70.) 
a, Secondaries 10. (Subfamily Oceanitine.) 
b.. 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. 
@. Front of tarsus distinctly scutellate; 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 UPPeL PALtS.......cccccecseservessceserscesenece Garrodia. 
d’. Front of tarsus not scutellate; distance from tip of bill to end of 
longest upper coverts much greater than length of middle toe 
with claw; lower parts dusky, or striped with dusky; upper 
tail-coverts white. 
e'. Claws narrow, pointed; first quill much shorter than third; 
belly and flanks uniform dusky... Oceanites. (Page 71.) 
é. Claws broad, flat, blunt; first quill longer than third; belly 
and flanks white striped with dusky............cs0000 Pealea,? 
ce, Culmen (from frontal feathers) more than half as long as middle toe, 
with claw; tarsus 2% times as long as culmen, appreciably scutel- 
late in front; nails broad, flat, and blunt; first quill much shorter 
than third..........cssccsssssessessteeeeeeseenes Pelagodroma. (Page 72.) 
0%. 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 scutelle sometimes ap- 
preciable, sometimes obsolete; nails excessively broad (nearly as broad 
as long), flat, triangular ; first quill decidedly shorter than third. 
Cymodroma. (Page 71.) 
1 Garrodia Forzes, P. Z, 8. 1881, 736. Type, Procellaria nereis GouLD. 
2 Pealea Riwew., Auk, iii., July, 1886, 334. Type, Thalassidroma lineata PEALE. 
