10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



Basileuterus leucopyglus Sclatek and Sal\'in, Nom. Avium Neotrop., 1873, 

 p. 10 (in list of species), p. 156 (Costa Rica; orig. descr. ; type now in 

 coll. Brit. Mus. ). — Sal\tn and Godman, Biol. Centr.-Amer., Aves, vol. 1, 

 ISSl. p. 172, part (Nicaraguan and Costa Rican localities and refs. ; 

 crit.).— NxjTTiNG, Proc. U. S. Nat. Mus., vol. 6. 1884, p. 399 (Los Sabalos, 

 Nicaragua; habits ) .—Sharpe, Cat. Birds Brit. Mus., vol. 10, 1885, p. 402 

 (Tucuiriqui, Costa Rica; descr.; refs.). — Zeledon, An. Mus. Nac. Costa 

 Rica, vol. 1, 1887, p. 107 (Angostura and Tuis, Costa Rica). — Ridgway, 

 Proc. U. S. Nat. Mus., vol. 10. "1887," 1888, p. 585 (Segovia River, 

 Honduras).— Richmond. Proc. U. S. Nat. Mus., vol. 6. 1893, p. 485 (Rio 

 Frio, Nicara.gua ; habits). — Underwood. Ibis. 1896, p. 434 (Volcano Mira- 

 valles, Costa Rica). 



Ba^ileuicriis setnicermnus Jcuvopjif/ius Nutting, Proc. U. S. Nat. Mus., vol. 5, 

 1882, p. 390 ("La Palrna," Gulf of Nicoya, Costa Rica; ho bits). —Ridg- 

 way, Bull. U. S. Nat. Mus., No. 50, vol. 2, 1902, p. 757 (descr.; range; 

 refs.). — Carriker, Ann. Carnegie Mus., vol. 6, 1910, p. 793 (Costa Rican 

 localities and refs.; range; habits). — Rendahl. Ark. f. Zool., vol. 12, No. 8, 

 1919, p. 36 (Siquirres, Costa Rica). 



Basileuterus fulvicauda gaffneyl Griscom, Amer. Mus. Nov. No. 280, 1927, 

 p. 14 (Guaval, Rio Calovevora, western Panama; orig. descr.; type in 

 coll. Amer. Mus. Nat. Hist.). 



Description. — Above dark brownish olive, the pileum darker and 

 more sooty; wings externally like the back; tail deep brown, with 

 more or less olive brown edgings on the terminal half, cream buff 

 on the basal half, together with the upper tail-coverts and lower 

 rump; faintly indicated superciliaries dull buffy, and auricular 

 region more or less mottled or varied with the same color: under 

 parts dull whitish, more or less washed with buffy on the breast 

 and sides, and with obscure brownish mottling on the same parts: 

 under tail-coverts cream buff; under wing-coverts dusky, with Avhit- 

 ish mottling; "iris brown; bill black; feet browni.sh flesh color.'" 



Juvenal plumage: Similar to that of the adult, but duller, espe- 

 cially below, the throat and breast colored like the back: no light 

 markings about the head. 



Measurements. — Male: wing, 62-67 (average, 64.5); tail, 50-54 

 (51) ; bill, 11-12.5 (12) ; tar.sus. 22-22.5 (22.2). Female: wing, 60-69 

 (63); tail, 48-52 (50); bill, 11.5-12.5 (12): tarsus, 20-23.5 (22.5). 



Rcmge. — Tropical Zone, southern Honduras to Costa Rica (except 

 southwestern part), and thence eastward along the Caribbean slope 

 of western Panama. 



Rernarks. — At first this bird was confused with its South Ameri- 

 can congener, '"'' uroyygialis'''' {^ fulm<:auda) . but was separated in 

 1873, on the ground of its darker back and lighter-colored rump. 

 Salvin and Godman, writing in 1881, admitted it as distinct from, 

 although closely allied to, semicervina^ and included Panama in its 

 range. Mr. Ridgway, indeed, rated it as a subspecies of that form, 

 but without actual comparison of specimens. More recently Mr. 



