ART. 7 EEVISIOJST OF THE GENUS BASILEUTEEUS TODD 63 



Remarks. — The generally deeper tone of the under parts serves 

 to distinguish this race from its nearest ally, B. t. Tnelanotis of 

 Costa Rica and Chiriqui. It occupies the easternmost extension of 

 the mountain ridge of western Panama, just before this breaks down 

 at the Isthmus, and in its characters suggests an approach to B. 

 tacarcunae of eastern Panama, as remarked by the describer. 



Specimens examined. — Panama: Chitra (4,000 feet), Veraguas, 6. 



BASILEUTERUS TRISTRIATUS MELANOTIS Lawrence 



Basileutervs melanotis Laweence, Ann. Lye. Nat. Hist. N. T., vol. 9, 1868, 

 p. 95 (Cervantes [type locality] and Birris, Costa Rica; orig. descr. ; 

 type in coll. U. S. Nat. Mus.).— Salvin, Ibis, 1869, p. 313 (crit.) ; 

 1870, p. 108 (Veragua; crit.). — von Berlepsch, Joum. f. Orn., vol. 

 32, 1884, p. 283, note (crit.).— Shabpe, Cat. Birds Brit. Mus., vol. 10, 

 18S5, p. 386 (Costa Rica and Cordillera del Chucu, Veragua ; descr. ; 

 refs.).— Bangs, Proc. New England Zool. Club, vol. 3, 1902, p. 60 (Bo- 

 quete and Volcan de Chiriqui, Panama). — Ridgway, Bull. U. S. Nat. 

 Mus., No. 50, vol. 2, 1902, p. 752 (descr.; range; refs.). — Carbiker, 

 Ann. Carnegie Mus., vol. 6, 1910, p. 795 (Costa Rican localities and 

 refs.; habits). 



Basileuterus hivittatus (not of Lafresnaye and D'Orbigny) Salvin, Ibis, 

 1870, p. 108, part (crit.) ; Proc. Zool. Soc, London, 1870, p. 183 (Cor- 

 dillera del Chucu, Veragua). — Salvin and Godman, Biol. Centr.-Amer., 

 Aves, vol. 1, 1881, p. 170, part, excl. extraliinital localities and refs. 

 (Cervantes and Birris, Costa Rica ; Cordillera del Chucu, Panama ; descr. ; 

 crit. ) . 



Basileuterus hivittatus melanotis Zeledon, An. Mus. Nac. Costa Rica, vol. 1, 

 1887, p. 107 (Costa Rica). 



Basileuterus tristriatus melanotis Heh^lmatr, Proc. Zool. Soc. London, 1911, 

 pp. 1092, 1212 (range).— Chapman, Amer. Mus. Nov. No. 143, 1924, p. 4 

 (range), p. 7 (diag. ; Aquinares and Cartage, Costa Rica; Chiriqui, 

 Panama). 



Suhspeciflc characters. — Similar to Basileuterus tristriatus daeda- 

 lus, but upper parts darker, more olive green ; under parts averaging 

 more greenish yellow, less buflfy; black on the sides of the head more 

 restricted, the lower part of the auriculars and most of the lores 

 being buffy. 



Measurements. — Male: Wing, 57-67 (average, 62.5); tail, 50-57 

 (54) ; bill, 9-10.5 (10) ; tarsus, 20-21.5 (20.8). Female (eight speci- 

 mens) : Wing, 58-64 (60) ; tail, 51-58 (53.5) ; bill, 9.5-10.5 (10) ; tar- 

 sus, 19-21 (20.4). 



Range. — Subtropical Zone, highlands of Costa Rica and western 

 Panama. 



Remark's. — This form is certainly closely related to the South 

 American Basileuterus tHstnatus group, so closely indeed that in 

 spite of the fact that it can not intergrade geographically, either di- 

 rectly or indirectly, with any of the forms of that group (since, being 



