506 



REVIEW OF AMERICAN BIRDS. 



[part I. 



genus among American Swallows. In two specimens before me I 

 can make out only ten tail feathers, and cannot say whether more 

 exist. Neither has the wings perfect, so that I cannot indicate the 

 number of primaries. The tj'pe, and hithrrto single representative 

 of the section, is A. fasciala, of Cayenne.* 



NoTiocHELiDON, Baird. 



Notiochelidon, Baikd. (Type Atttcora pileata, Gould.) 



Bill small ; nostrils superior, as in Atticora, but less perfectly circular. 

 Tarsi entirely bare, even on tlie joint of tibia, rather long — equal to middle 

 toe and half claw. Lateral toes short ; about equal, or the outer a little the 

 longer ; the claws all stout, sharp, much curved. Outer toe adherent for 

 nearly half its length (two terminal joints free) ; the terminal one and a half 

 joints, or three-fifths of middle toe free. Inner toe united to basal two-thirds 

 of middle. Tail deeply forked for about one-third the length, the branches 

 divaricated. 



No metallic lustre, except upon the top of head. Beneath white ; the 

 crissum blackish. 



This form differs from typical Atticora in less deeply forked tail, 

 and in less adhesion of toes — the middle toe being free externally 

 for one and a half joints, instead of only one, and internally in pro- 

 portion. The feet are more slender, and the claws less curved ; the 

 tarsus entirely bare, even to the joint. 



' Atticora fasciata. 



lUrundo fasciata, Gm. S. N. I, 1788, 1022 (based on PI. enl. 724, fig. 2, 

 (Cayenne). — Sw. Zool. 111. 2d ser. pi. xvii. — Atticora fasciata, 

 BoiE, Isis, 1844, 172.— BuRM. Ueb. Ill, 1857, 146.— Sclater, Catal. 

 1861, 39, no. 236. 

 Hab. Brazil and Cayenne. 



Entirely glossy black, with faint dark steel blue lustre ; wings and tail 

 duller. A sharply defined white band across the sides and middle of breast ; 

 tibisB white. The claws very sharp. 



(No. 149.) Total length, 5.40 ; wing, 3.90 ; tail, 3.20 ; depth of fork, 1.20 ; 

 length of bill from forehead, .37, from nostril, .20, along gape, .46, width, .38 ; 

 tarsus, .50; middle toe and claw, .50, claw alone, .19; hind toe and claw, 

 .34, claw alone, .19. 



