40 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



X, 1893, 220 (Tobago); Birds W. I., 1889, 70; Cat. W. I. Birds, 1892, 114, 

 152 (Jamaica; Haiti; St. Eustatius, St. Cliristopher; Dominica; Martinique; 

 Grenada; Barbados; Tobago).— Shaepe, Cat. Birds Brit. Mus., x, 1885, 176, 

 633 (Porto Rico; Santo Domingo; Jamaica; Dominica; Santa Lucia).— 

 Wells, Proc. U. S. Nat. Mus., ix, 1887, 612 (Grenada; habits).— Scott, _ 

 Auk., X, 1893, 181 (Jamaica).— Shaepe and Wyatt, Mon. Hirund., 1894, 

 465, 487, pi. 91. 



Plrogne'] dominicensis Gray, Gen. Birds, i, 1845, 59.— Newton (A. and E.), 

 Handb. Jamaica, 1881, 107. 



[Progne] dominicensis Bonaparte, Consp. Av., i, 1850, 337. — Gray, Hand-list, i, 

 1869, 74, no. 891.— Sclateb and Salvin, Nom. Av. Neotr., 1873, 14.— Cory, 

 List Birds W. I., 1885, 10. 



Progne {subis var ?) dominicensis Baied, Brewer and Bidgway, Hist. N. Am. 

 Birds, i, 1874, 328, footnote. 



Hirundo albiventris Vieillot, Nouv. Diet. d'Hist. Nat., xiv, 1817, 533 (Santo 

 Domingo?); Enc. M4th., ii, 1823, 531. 



PROGNE SINALCffi Nelson.a 

 SINALOA MARTIN. 



Similar to P. dominicensis, but smaller. 



Adult male. — Exactly like that of P. dominicensis in coloration; 

 length (skins), 168-190 (177); wing, 136-138 (136.7); tail, 67-72 (69.5), 

 forked for 16.5-19.5 (17.5); exposed culmen, 10-10.5 (10.1); width of 

 bill at frontal antise, 8-9 (8.4); tarsus, 12.5-13.5 (13.2); middle toe, 

 13-15 {Uy (Adult female not seen.) 



Western Mexico, in State of Sinaloa (Plomosas). 



Progne sinalox Nelson, Proc. Biol. Soc. Wash., xii, March 24, 1898, 59 (Plomo- 

 sas, Sinaloa; coll. XJ. S. Nat. Mus.). 



PROGNE CHALYBEA CHALYBEA (Gmelin). 

 GRAY-BREASTED MARTIN, 



Adult male. -AhoYG uniform dark steel blue or violaceous steel 

 blue, usually changing gradually to dull sooty on forehead;" wings 

 and tail black, faintly glossed with bluish; loral, suborbital and malar 

 regions, chin, throat, chest, sides and outer portion of flanks plain 

 grayish brown or sooty gray, the chin and throat usually somewhat 

 paler than other parts, the feathers of chest usually tipped, more or 

 less distinctly, with pale gray or grayish white;** rest of under parts 



a This form is probably a subspecies of P. dominicensis, but without knowledge as 

 to the coloration of the adult female and young it would be unwise to so name it. 

 As in the case of P. cryptoleuca, the adult male of which is practically identical in 

 coloration with that of P. subis while the adult female and young are indistinguish- ■ 

 able from those of P. dominicensis, the present form may prove to be very different 

 from the latter in its unknown plumages. 



^ Four specimens. 



« Possibly fully adult males always have the forehead steel blue like the rest of 

 the upper surface; but there are comparatively tew such in collections. 



<* Sometimes the sides of the breast have a patch, more or less extensive, of steel 

 blue, and very rarely this covers most of the parts usually gray, only the chin and 



