290 



REVIEW OF AMERICAN BIRDS 



[tart L 



(.•34,.3J2.) .5.90; 12.10. (34,354.) 6.00; 11.80. 



PetrocSielidoii swaiusoui. 



Ilintndo melaiiofjnater, Swainson, Phil. Mag. I, 1827, 366 (Mexico). — 

 Petrochelldon melonogaster, Cab. Mus. Hein. I, 1850, 47. 



Petrochelidon sivainsonl, Sclatek, P. Z. S. 1858, 296; 1859, 376.— In. 

 Catal. 1861, 40, no. 244. (Swainson's name changed as inappro- 

 priate.) 



Eah. Highlands of Mexico. 



This species is almost precisely like P. lunifrons, but is smaller, and the 

 frontlet, instead of being creamy or rosy white, is chestnut brown like the 

 throat ; the lores are less dusky, and there is no dusky at base of upper 

 mandible. In these respects it resembles P. falva, but will be readily dis- 

 tinguished by the large glossy black spot on the throat, and blackish chin, as 

 well as comparative absence of reddish on crissum and sides. 



Two specimens, both marked males, differ considerably in size, as 

 shown by the following measurements. In one (22,376) the forehead 

 is of the same shade of rufous as the throat, and the black spot on 

 the throat very small ; in the other, which is decidedly larger, the 

 forehead is considerably paler than the throat, and the throat spot 

 more distinct, the chestnut of throat and sides of head much darker. 



(No. "22,376, % .) Total length, 4.50 ; wing, 3.90 ; tail, 2.25 ; difiference of 

 quills, 1.90; length of bill from forehead, .35, from nostril, .21, along gape, 

 .55; tarsus, .48; middle toe and claw, .60, claw alone, .20; hind toe and 

 claw, .37, claw alone, .19. 



(No. 33,572. ) Total length, 4.90 ; wing, 4.30 ; tail, 2.20 ; length of bill from 

 forehead, .41, from nostril, .22, along gape, .60; tarsus, .53; middle toe and 

 claw, .66, claw alone, .21 ; hind toe and claw, .38, claw alone, .21. 



Smith- 

 sonian 



No. 



22,376 

 33.572 



Collec- 

 tor's 

 No. 



40,74.5 



i.'je 



Sex 

 and 



Locality. 



When 



Collected. 



Received from 



Collected by 



Mexico. 

 Mirador, Mex. 



Aug. 1S63. 



Vcrreaux 

 Dr. Sartorius. 



