BIRDS OF NORTH AND MIDDLE AMERICA 139 



Rostrhatnus sociabilis subsp. plutnbeus? Gurnet, List Diurn. Birds Prey, 1884, 

 85, part. 



Rostrhamus sociabilis plumbeus SwANN, Synop. Accip., pt. 3, 1922, 156, part (e. 

 Mexico).— Peters, Clieck-list Birds of World, i, 1931, 201, part (distr.).— 

 American Ornithologists' Union, Check-list, ed. 4, 1931, 64, part (distr.). — 

 Griscom, Bull. Amor. Mus. Nat. Hist., Ixiv, 1932, 161 (distr.; Guatemala).— 

 Van Tyne, Misc. Publ. Mus. Zool. Univ. Michigan, xxvii, 1935, 17 Pet6n, 

 Guatemala) . 



Rostrhanms sociabilis major Nelson and Goldman, Proc. Biol. Soc. Washington, 

 xlvi, 1933, 193 (orig., descr.; distr.). — Swann, Monogr. Birds Prey, ii, 1934, 

 250.— Traylor, Publ. Field Mus. Nat. Hist., zool. ser., xxiv, 1941, 199, 202 

 (Pacaitun, Yucatdn). — Brodkorb, Misc. Publ. Mus. Zool. Univ. Michigan, 

 No. 56, 1943, 27 (Mexico: Campeche, Palizada, and EI Vapor; spec; meas.). 



ROSTRHAMUS SOCIABILIS LEVIS Friedmann 



Cuban Snail Kite 



All plumages similar to corresponding stages of typical sociabilis, 

 but with slightly longer culmen. 



Adult male.— Wing 350-371 (360.5); tail 186.5-188.5 (187.5); 

 culmen from cere 25-25.5 (25.2); culmen including cere 33.2-35.5 

 (34.3); tarsus 55.5-57 (56.2 mm.) (2 specimens). 



Adult female. — Wing 365; tail 187.5; culmen from cere 26; culmen 

 including cere 33; tarsus 56.5 mm. (1 specimen). 



Range. — Cuba (Lake Ariguanabo; Canto Valley) and the Isle of 

 Pines; becoming rarer as the marshes are being drained. 



Type locality. — Cuba. 



Rostramus sociabilis (not Herpetotheres sociabilis Vieillot, 1818) d'Orbigny, in 

 La Sagra, Hist. Nat. Cuba, Ois., 1839, Spanish ed., 30, French ed., 15. — 

 PoEY, Mem. Real Soc. Econ. Habana, ser. 2, vi, No. 2, 1848, 100 (Cuba). 



Rostrhamus sociabilis Gundlach, Repert. Fisico Nat. Cuba, i, 1865-66, 222; 

 Journ. fiir Orn., 1871, 362 (Cuba; habits); Contr. Orn. Cubana, 1876, 37; 

 Orn. Cubana, 1895, 14.— Gray, Hand-list, i, 1869, 27, No, 251, part.— 

 RiDGWAY, Proc. Acad. Nat. Sci. Philadelphia, 1870, 144, part. — Gurney, 

 Ibis, 1879, 341, part (syn.) ; 1882, 455, 456, in text, part (crit.; meas.). — Cory, 

 Auk, iv, 1887, 47 (Cuba); Birds West Indies, 1889, 205 (Cuba); Cat. West 

 Indian Birds, 1892, 98 (Cuba; Isle of Pines). — Bangs and Zappey, Amer. 

 Nat., xxxix, 1905, 191 (Isle of Pines). — Todd, Ann. Carnegie Mus., x, 1916, 

 192 (Isle of Pines). — Sxvann, Synopt. List Accip., pt. 3, 1920, 99, part 

 (Cuba). 



Rosthramus sociabilis Gundlach, Cat. Aves Cubana, Anales Soc. Esp. Hist. Nat., 

 ii, 1873, 98 (Cuba).— Cory, List Birds West Indies, rev. ed., 1886, 22 

 (Cuba). — Ihering and Ihering, Av. Brazil, 1907, 96, part ("Antilles," etc.). 



Cymindes sociabilis Oberholser, Proc. Biol. Soc. Washington, xxxv, 1922, 79, 

 part; Auk, xl, 1923, 679, part; Auk, xh, 1924, 593, part (syn.). 



Cymindes sociabilis plumbeus Oberholser, Auk, xli, 1924, 593 part (syn.). 



Rosthramus hamatus Cabanis, Journ. fiir Orn., 1854, p. Ixxx (Cuba). — Brewer, 

 Proc. Boston Soc. Nat. Hist., vii, 1860, 306 (Cuba). — Gundlach, Journ. 

 fiir Orn., 1861, 322, 402 (Cuba; crit.). 



