ART. 7 EEVISIOK" OF THE GENUS BASILEUTEP.US TODD 13 



in the Lawrence collection being setnicervina (I had already so 

 identified them), but either they came from some other part instead 

 (eastern Panama?), or else both seviicervlna and veragu-erisis occur 

 on the Isthmus. Additional field work is needed to determine this 

 point, but in my judgment there is already enough evidence to show 

 that veimguensis rests on a sufficientl}'^ sound basis. Dr. C. E. Hell- 

 mayr, who has gone over this case at my request, with Mr. Griscom's 

 t3'pe and other material before him, agrees with this conclusion. 



Mr. Griscom claims that between the bird of the Canal Zone and 

 that of Avestern Panama intergradation is " ecologically impossible " 

 because of the interposition of arid country, but it would seem 

 as if the gallery forests of this part might suffice to carr}' the range 

 across. 



Specimens exaonined. — Panama: El Banco (3,000 feet), Chiriqui, 

 1; Boqueron, Chiriqui, 1; Chiriqui, 1; Boquete, 3 (including type 

 of Basileuterus fulvicauda toddi Griscom); Divala, 1; Cascajal, 

 Code, 2; Eio Siri (20 miles S. of Gatun), 1; Rio Indio (near 

 Gatun). 2; Gatun, 1. Costa Rica: Boruca, 20; Buenos Aires, 4. 

 Total, 37. 



PHAEOTHLYPIS SEMICERVINA SEMICERVINA (Sclater) 



Basileuterus semiccrrinus Sclater, Proc. Zool. Soc. Loudon, ISGO, p. S4 

 (Nanegal, Ecuador ; orig. descr. ; type in coll. Brit. Miis.), p. 291 (Esmeral- 

 das, Ecuador). — Laweknce, Ann. Lye. Nat. Hist. N. Y., vol. 7, 1861, 

 p. 322 (Panama R. R., Panama; crit.). — Baird, Rev. Amer. Birds, 1865, 

 p. 243 (crit.), p. 244 (refs.). — Sclater, Proc. Zool. Soc. London, 1865, p. 

 286, pi. 10, fig. 1 (refs.; diag. ; range). — Sclater and Salvin, Proc. Zool. 

 Soc. London, 1879, p. 494 (Remedies and Neche, Antioquia, Colombia).— 

 Salvin and Godman, Biol. Centr.-Amer., Aves, vol. 1, 1881, p. 173, in text 

 (Santa Rita, Ecuador; range; crit.). — von Berlepsch and Taczanowski, 

 Proc. Zool. Soc. Loudon, 1883, p. 541 (Chimbo, Ecuador). — von Berlepsch, 

 Journ. f. Orn., vol. 32, 1S&4, p. 284 (Bucaramanga, Colombia).— Tac- 

 zanowski and von Berlepsch, Proc. Zool. Soc. London, 18S5, p. 6S 

 (Chimbo, Ecuador).— Sharpe, Cat. Birds Brit. Mus., vol. 10, 1885, p. 404 

 (Nanegal, "Quito," and Santa Rita Mountains, Ecuador; "Bogota," 

 Colombia; descr.; refs.; crit.). — Haetert, Nov. Zool., vol. 5, 1898, p. 480 

 (Cachavi, Ecuador). — Salvadori and Festa, Boll. Mus. Zool. ed »Anat. 

 comp. Torino, vol. 15, No. 357, 1899, p. 9 (Foreste del Rio Peripa, Ecuador ; 

 Ecuadorean records. — Goodfellow, Ibis, 1901, p. 314 (Nanegal, Ecuador). 



Basileuterus uropygiaJis (not of Sclater, 1861) Sclater and Salvin, Proc. 

 Zool. Soc. London, 1864, p. 347 (Lion Hill, Panama; crit.). — Baird, Rev. 

 Amer. Birds, 1865, p. 243 (crit.), p. 246 (Panama R. R., descr.; refs.; 

 crit.). — Taczanowski, Proc. Zool. Soc. London, 1877, p. 331 (Palmal, 

 Ecuador). — Heine and Reichenow, Nom. Mus. Heineani Orn., 1882, p. 

 14 ("Bogota,"' Colombia). — Sharpe, Cat. Birds Brit. Mus., vol. 10, 1SS.">, 

 p. 405, part ("Bogota" and Remedies, Colombia; crit.). 



Basileuterus leucopygius (not of Sclater and Salvin) Salvin and Godman, 

 Biol. Centr.-Amer., Aves, vol. 1, 1881, p. 172. part (Panama R. R., crit.). 



Basileuterus semicervinus uropygialis Ridgway, Bull. U. S. Nat. r>Ius., No. 

 50, vol. 2, 1902, p. 756, note ("Bogotti," Colombia; crit.). 



