1871.] MR. P. L. SCLATER ON CERTAIN DENDROCOLAPTID^E. 85 



This point being settled, the following changes must be made in 

 the nomenclature of the four species of Myiarchus differentiated by 

 Baird(B. N. A. p. 177): — 



(1) Myiarchus cooperi of Baird must stand as Myiarchus mexi- 

 canus (Kaup), being, as just proved, Tyrannula mexicana, Kaup, 

 P. Z. S. 1851, p. 51. 



(2) Myiarchus mexicanus of Baird must stand as Myiarchus 

 cinerascens, Lawrence. 



A second obscure type among the Mexican Tyrannidse that I have 

 lately met with is Tyrannula harbirostris of Swainson, Phil. Mag. 

 1827, p. 367. The specimen upon which this species was founded 

 is now in the Cambridge Museum, and is labelled in Swainson' s own 

 handwriting. It agrees exactly with Blacicus tristis (Gosse) ; Scl. 

 Cat. A. B. p. 234 — a well-known species of Tyrant-birds from 

 Jamaica. There is no doubt, therefore, I think, that there has 

 been an error in locality here, and that the species may be expunged 

 from the Mexican list, whilst the Jamaican Blacicus must adopt the 

 name harbirostris instead of the subsequently given term tristis of 

 Gosse. 



7. Remarks on some Species of Dendrocolaptidcs in the 

 Collection of the Smithsonian Institution. By P. L. 

 Sclater, M.A., Ph.D., F.R.S., Secretary to the Society. 



[Beceived January 13, 1871.] 



In a series of skins of birds of the family Dendrocolaptidse sub- 

 mitted to me for determination by the authorities of the Smithsonian 

 Institution are several specimens of much interest, and concerning 

 which I beg leave to offer a few remarks to the Society. 



1 . Synallaxis cand^ei. 



Synallaxis candcei, Lafr. et D'Orb. Rev. Zool. 1838, p. 165 ; Bp. 

 Consp. i. p. 213. 



Castanea : pileo toto et capitis lateribus sordide nigris : mento et 

 gulce lateribus utrinque albis : gula media nigra: ventre medio 

 albo : cauda castanea, recticibus decern, harum sex mediis nigri- 

 cante late terminatis : long, tota 6, alee 2"3, caudee rectr. 3, 

 lat. 1'2, poll. Angl. 

 Hab. Cartagena (Cande) ; Rio Hacha (Delattre,'m Mus. Derb.) ; 

 Savanilla (Ashurst). 



I have previously seen examples of this rare and pretty Synallaxis 

 only in the Derby and Berlin Museums. It appears to be restricted 

 to the northern littoral of Columbia. Its nearest ally known to me 

 is S. kollari, Pelzeln *, from the Rio Brancho, in which, however, 



* Orn. Bras. p. 36. 



