HIRUNDO. 301 
(No. 35,049, 4.) Total length, 4.25; wing, 3.75; tail, 1.90; depth of fork, 
.25; difference of primaries, 1.80; length of bill from forehead, .35, from 
nostril, .22, along gape .55, width of gape, .45; tarsus, .42; middle toe and 
claw, .05, claw alone, .18; hind toe and claw, .33, claw alone, .15. 
The above description is taken from a type of Mr. Salvin’s P. 
littorea. Mr. Lawrence’s type of albilinea is almost precisely like 
it—a little larger, and with patches of a more bluish gloss on the 
back. 
This species is very similar to P. leucorrhoa,t of Buenos Ayres, 
which is, however, much larger, and lacks the concealed white of the 
forehead and hind neck. The greenish-black collar margining the 
jugulum in lewcorrhoa is more nearly continuous below, and is in a 
measure completed by concealed dusky edges to the feathers across 
the breast. There is no dusky appreciable on the shafts. of the 
feathers of the under parts, and almost none on the rump, and there 
is no distinct white at the base of the tail feathers. The outer tail 
feather is narrowly edged with whitish. 
An albino Swallow, collected by Col. Grayson, at Mazatlan, 
belongs, as nearly as I can ascertain, to H. albilinea. 
‘Both these species are distinguished from P. leucoptera of eastern, 
and P. meyent of western South America, by their white loral stripe 
or line. JI add description of these two species in order to complete 
the history of the genus. 
1 Hirundo leucorrhoa. 
Hirundo leucorrhoa, Viritu. Nouv. Dict. XIV, 1817, 519, and Encyel. 
Méth. 1823, 523, Paraguay (Azara, Apunt. II, 509).—Petrochelidon 
leuc. Cas. Mus. Hein. 1850, 48.—Cotyle leuc. Burm. Uebers. III, 
1656, 144.—Is. La Plata Reise, 1861, 478 (Parana). 
Hirundo frontalis, Gounp, Pr. Zool. Soc. 1837, 22.—In. Birds Beagle, 
1841, 40 (Monte Video). 
“HHirundo leucopyga,” Licat. Mus. Berol.—Casanis, Mus. Hein. 48. 
Hirundo gouldii, Cassin, Pr. A. N. Sc. 1850, 69 (“H. frontalis,” Gov). 
Hab. Paraguay and adjacent regions. Nests in hollow trees or holes in 
ground. 
(No. 12,351.) Total length, 5.20; wing, 4.45 ; tail, 2.40; depth of fork, .20; 
difference of quills, 2.10? length of bill from forehead, .49, from nostril, .25, 
along gape, .61; tarsus, .50; middle toe and claw, .70, claw alone, .20; hind 
toe and claw, .46, claw alone, .21. 
: | 
Smith-|Collee-) Sex When 
sonian| tor’s | and ocality. Received from Collected b 
NG: No. | Age. Collected. y 
12,351 27 Buenos Ayres. Beit Capts Page: UMSHS; 9) 0 25ea 
Argentina, ° 
