98 BULLETITSr 50, UNITED STATES NATIONAL MUSEUM. 



Hirund., 1894, 175, 191, part (United States, British Columbian, and Gua'ie- 



malan localitieH and references). 

 {?)Petroc}ielidon tJialaffslna (not Hirundo thalassinus Swainson?) Sclater and 



Salvin, Ibis, 1859, 13 (Duenas, Guatemala; abundant in early March). 

 Tachycineta lepida Mearns, Proc. Biol. Soc. Wash., xv, March 5, 1902, 31 



(Campbell's Ranch, Laguna Mts., 20 miles north of Campo, San Diego Co., 



California; coll. U. S. Nat. Mus. ). — Geinnell, Pacific Coast Avifauna, no. 3, 



1902, 61. 

 Tachycineta thalassina lepida American Ornithologists' Union Committee, Auk, 



xix, July, 1902, 325.— Brewster, Bull. Mus. Comp. Zool., xh, 1902, 167, 



169 (La Paz, Lower California, 1 spec, Feb. 14; measurements). 



TACHYCINETA THALASSINA BRACHYPTERA Brewster. 

 SAINT LUCAS VIOLET-GREEN SWALLOW. 



Similar to T. t. lepida, but decidedly smaller (except feet). 



Advlt ?mZ6.— Length (skins), 103-112 (105.7); wing, 101.5-108.5 

 (105.2); tail, 41-45.5 (42.8), forked for 4.5-7 (5.4); exposed culmen, 

 4.5-5 (4.8); tarsus, 10.5-11 (10.6). « 



Adult /m«^e.— Length (skins), 100-107 (103.3); wing, 99-104 

 (101.1); tail, 40-42 (40.8), forked for 3-7 (4.6); exposed culmen, 4.5-5 

 (4.6); tarsus, 10-11 (10.7).^ 



Cape district of Lower California (La Paz; Sier/a de la Laguna; 

 Triumfo; San Jose del Cabo). 



Hirundo thalassina (not of Swainson) Baird, Proc. Ac. Nat. Sci. Phila., 1859, 

 301, 302 (Cape St. Lucas; crit.) ; Review Am. Birds, 1865, 299, part (do.).— 

 Baird, Brewer, and Ridgway, Hist. N. Am. Birds, i, 1874, 347, part (Cape 

 St. Lucas). 



Tachycineta thalassina Coues, Birds N. W., 1874, 86, part (Cape St. Lucas); Birds 

 Col Val., 1878, 419, part (do.).— Ridgway, Nom. N. Am. Birds, 1881, no. 

 156, part. — American Ornithologists' Union, Check List, 1886, no. 615, 

 part (Cape St. Lucas).— Belding, Proc. U. S. Nat. Mus., v. 1883, 537 (La Paz, 

 Lower California). — (?) Anthony, Auk, xii, 1895, 142 (San Fernando, 

 Lower California, breeding). 



Tachyiineta thalnssiiM hracJnjptera Brewster, Bull. Mus. Comp. Zool., xli, no. 1, 

 Sept. 1902, 167 (Sierra de la Laguna, Lower California; coll. W. Brewster). 



Genus CALLICHELIDON Baird. 



CaUichelidon "Bryant, MSS.," Baird, Review Am. Birds, May, 1865, 271, 303. 

 (Type, Hirundo cyaneoviridis Bryant.) 



Small Hirundinidge (wing not more than 117 mm.) resembling Tacliy- 

 cinda^ but with frontal feathers extended anteriorly to or beyond 

 anterior end of nasal fossae, partly covering the nasal opercula; the 

 bill much thicker and broader, the tail more than half as long as wing, 

 forked for more than one-third its length, the lateral rectrices dis- 

 tinctly narrowed terminally, the inner side of tarsus entirely naked, 

 the lateral toes longer and stronger, their claws reaching nearly or 

 quite to base of middle claw, and sides of rump without white tuft. 



« Ten specimens. & Six specimens. 



