308 REVIEW OF AMERICAN BIRDS. [PART I. 
the rump and under parts paler, the tibia white. A second species 
appears to be N. fucata.* 
(No. 150, Panama.) Total length 4.00; wing, 3.45; tail, 2.00; depth of 
fork, .45 ; difference between Ist and 9th quills, 1.60; length of bill from fore- 
head, .27, from nostril, .17, along gape, .43; width at base, .32; tarsus, .35 ; 
middle toe and claw, .45, claw alone, .17; hind toe and claw, .28, claw 
alone, .11. 
Smith-'Collec- Sex i 
sonian| tor’s | and Locality. AP Received from Collected by 
No. No. | Age. ; i 
150 | Se Panama R., R. | es | Cab, Lawrence, M’Lean. & Galb. 
PyGocHELIDON, Baird. 
Pygochelidon, Bairp. (Type Hirundo cyanoleuca.) 
Bill minute. Nostrils broadly oval, nearly superior; the plane of their out- 
line directed obliquely forwards and inwards; not overhung anteriorly on 
inner edge by membrane. Tarsi rather long, equal to middle toe and half 
claw ; the joint and upper end on inner face with adherent feathers. Inner 
toe slightly longer. Basal joint of middle toe adherent externally, except 
just at the end; internally for half the length. Tail forked for about one- 
fourth the length. 
This subgenus differs from its other allies with the nostrils superior, 
1 Atticora fucata. 
Hirundo fucata, Tem. Pl. col. 161, fig. 1 (Paraguay).—Burm. Uebers. 
III, 145,.—Cotyle fucata, Bois, Isis, 1844.—Cas. M. H. I, 49.—Burm. 
Uebers. III, 1856, 145.—In. Reise La Plata, IT, 1861, 478 (Mendoza). 
Hab. Paraguay, Argentina, and La Plata basin generally ? 
This species has usually been placed in Cotyle, but probably on account of 
the dull brown color of upper parts, somewhat like that of C. riparia. The 
head and neck all round, with the jugulum, are reddish fulvous, above, how- 
ever, only tinging the dark brown of the head. The breast and sides are 
brownish, the belly and crissum white, all tinged with reddish; in general 
aspect, except the reddish color, much like C. riparia. It differs, however, 
in exposed nostrils, more connate and shorter toes, short claws, and absence 
of tuft of feathers at lower end of tarsus. 
In some respects, however, it differs decidedly from Neochelidon, as in having 
some bristles in the chin and along the base of commissure. The outer toe 
is a little shorter than inner, not a little longer ; the fork of the tail is shallower, 
the feathers broader and more rounded at tip. In many respects there is quite 
a close relationship to Petrochelidon, differing chiefly in the shorter and more 
adherent toes. The style of coloration is quite similar. 
- noite 
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