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Show 198 MR. O. SALVIN ON THE BIRDS OF VERAGUA. [Mar. 24, number of specimens have the outer web of the ordinary type, I conclude that this peculiar feature is an attribute of the male only. Rhynchocyclus jiavo-olivaceus. Calovevora. Myiodynastes nobilis. Chitra ; Calobre ; Bugaba. 102. HYPERMITRIS HEMICHRYSUS, Cab. J. f. Orn. 1861, p. 246. Myiodynastes superciliaris, Lawr. Ann. Lye. N. Y. viii. p. 470. Chitra ; Calovevora ; Calobre. Muscivora mexicana. Calovevora; Mina de Chorcha; V. de Chiriqui. Myiobius sulphureipygius. Calobre ; Bugaba ; V. de Chiriqui. 103. MYIOBIUS ATRICAUDUS, Lawr. Ibis, 1863, p. 183. Calovevora. This species, as well as the last mentioned, occur in Veragua. A single specimen from the above locality quite agrees with Panama specimens. Myiobius ncevius. Calovevora. Myiobius erythrurus. Bugaba. 104. MITREPHORUS AURANTIIVENTRIS, Lawr. Ann. Lye. N. Y. viii. p. 174. Calovevora. 105. EMPIDONAX ATRICEPS, sp. n. Supra fuscus : uropygio et collo postico paulo dilutioribus, pileo toto nigro : alis et cauda nigro-fuscis, secundariis et tectricibus alarum majoribus sordide albo marginatis, rectricibus utrinque extimis extus albo limbatis : subtus ochraceo-fuscus, gula et ventre imo albicantibus, loris et macula postoculari albidis: campterio et subalaribus sordide albis : rostri maxilla nigra, mandibula flava, pedibus nigris : long, tota 4*5, alee 2*3, caudce 2*0, tarsi 0*6. Hab. Volcan de Chiriqui (Arce). Obs. Species distincta, pileo nigro facile dignoscenda. Arce's collection from Chiriqui contains two specimens of this species, which, though a true Empidonax, is quite distinct in its coloration from any species I am acquainted with. 106. EMPIDONAX FLAVESCENS, Lawr. Ann. Lye. N. Y. viii. p. 133. Calovevora ; V. de Chiriqui. This species is closely allied to JE. bairdi, Scl., but differs in |