98 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Hirund., 1894, 175, 191, part (United States, British Columbian, and Guate- 

 malan localities and references). 



{?)PetrocheUd,on thalassina (not Hirundo thaXasdnus Swainson?) Sclatee and 

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



Tachydneta lepida Meakns, Proc. Biol. Soc. Wash., xv, March 5, 1902, 31 

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

 California; coll. TJ. 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., xli, 1902, 167, 

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



TACHYCINETA THALASS];NA BRACHYPTERA Brewster. 

 SAINT lUOAS VIOIET-GIIEEN SWAIXOW. 



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



Adult male.— Jjength (skins), 103-112 (105.7); wing, 101.5-108.5 

 (105.2); tail, 4145.5 (42.8), forked for 4.5-7 (5.4); exposed culmen, 

 4.6-5 (4.8); tarsus, 10.5-11 (10.6)." 



Adult female.— Length (skins), 100-107 (103.3); wing, 99-104 

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

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



Cape district of Lower California (La Paz; Sierra de la Laguna; 

 Triumfo; San Jose del Cabo). 



Hirundo thalassina (not of Swainson) Baied, 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 Coubs, 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 (LaPaz, 

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

 Lower California, breeding). , 



Tachycineta thalassina brachyptera Brewster, Bull. Mus. Comp. Zool., xli, no. 1, 

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



Genus CALLICHELIDON Baird. 



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

 (Type, Hirundo cyaneomridis Brj-ant.) 



Small Hirundinidse (wing not more than 117 mm.) resembling Tachy- 

 cmeta, but with frontal feathers extended anteriorly to or beyond 

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

 bill much thicker aad 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. 



