1867.] THK BIRDS OP EASTERN PERU. 755 



the Cayenne bird principally in its smaller size and darker uropygial 

 band. The females seem also different from those of the typical form, 

 being of a brighter ochreous behind, and having the yellow circlet 

 round the eye much less defined— in some specimens hardly apparent. 

 Specimen c of Tachyphotius surinamus (from Guia) of Sclater's col- 

 lection (Cat. A. B. p. 85) also belongs to this form. 



(42.) Clypicterus oseryi (Deville). 



Cassicus oseryi, Deville, Rev. Zool. 1849, p. 57; DesMurs, Zool. 

 Voy. Casteln. p. 66, pi. 18. f. 3. 



Clypicterus oseryi, Bp. Consp. i. p. 426. 



One example of this fine species, not quite adult, from Xeberos. 

 It is the first time we have met with it. 



(47.) ScLERURUs MExiCANUs, Sclatcr. 



See our observations on this species {antea, p. 5/4). It is in- 

 teresting to meet with a second southern specimen, confirming our 

 views there expressed. 



(53.) Xenops approximans, Pelzeln, Sitz. Ak. Wien, xxxiv 

 p. 113(1859). 



Two examples of this form from Chyavetas, agreeing with one of 

 Natterer's typical skins of this species in Sclater's collection. 



(54.) Dendrocolaptes radiolatus, Sclater, MS. 



One example from Yurimaguas of a species in Sclater's collection 

 allied to D. cayennensis and B. sancti-thomoe of Central America. 

 It may be characterized as follows : — 



(Smj'fo D. cayennensi, sed major, supra et suhtus omnino fasciolis 

 nigris distincte transradiolatus : alis et cauda ferrugineo-rufis, 

 alarum tectricibus nigro transradiatis : rostro pallide corneo; 

 pedibvs fuscis : long, tola 12-5, alee b'O, caudce 4-7, rostri a 

 rictu 1-0 poll. Angl. 

 Hah. in Peruv. orient. Yurimaguas {Bartlett). 

 In D. sancti-thomce the lower back is rufous, unbarred ; the ra- 

 diations .are much closer, the bill is smaller and nearly black, and 

 the whole bird is smaller. 



A fourth species of this group (the only other with which we are 

 acquainted) is the newly described B. concolor, Pelzeln. 



(55.) Dendrornis ocellata, Spix. 



Dendrocolaptes ocellatus, Spix, Av. Bras. i. p. 88, t. 91. f. 1. 



A single specimen agrees with a skin (determined by Pelzeln to 

 belong to Spix's species) in Sclater's collection, collected bv Natterer 

 on the Rio Negro. 



(57.) Thamnophilus fuliginosus, Gould. 



A female, probably of this species, from Xeberos. A somewhat 

 similar specimen is in the British Museum. 



