2/2 MESSRS. SCLATER AND SALVIN ON [Mar. 4, 



on the Lower Ucayali, which remained undetermined. We have since 

 compared this specimen with the types of Picolaptes notatus, Eyton, 

 Contr. Orn. 1852, p. 26, and Dendrornis multiguttata, Lafr. R. Z. 

 1850, p. 417, and have decided that these names are synonyms, and 

 both belong to it. A Nattererian skin from Para, determined by 

 v. Pelzeln as Dendroplex similis (Orn. Bras. p. 46), is also appa- 

 rently not different. 



Fam. FormicariidjE. 



The Ant-Thrushes and their allies are very abundant in the great 

 forests of Upper Amazonia, no less than forty-six species being 

 represented in the collections of which we speak, about half of which 

 are peculiar to the district. 



1. Cymbilanius lineatus (Vieill.) ; Scl. & Salv. P. Z. S. 1866, 

 p. 566; 1867, p. 978. 



Nauta (Bartlett) ; Pebas (Hauxwell). 



" This species appears very rare in Peru ; the only specimen 

 obtained was taken near the town of Nauta." — E. B. 



2. Thamnophilus unduliger, Pelz. Orn. Bras. p. 75. 



Th. fuliginosus, Scl. & Salv. P. Z. S. 1867, pp. 750, 755. 



The specimen spoken of " as probably a female of Th. fuliginosus " 

 (P. Z. S. 1867, p. 755) is undoubtedly referable to Th. unduliger of 

 v. Pelzeln (quite a different bird), of which Mr. Bartlett subse- 

 quently obtained both sexes. 



" Of this rare and beautiful species I obtained one female in 

 Xeberos, and three females and one male in Chamicuros. The 

 male is slate-coloured on the back and crest, with transverse black 

 bars all over the body ; the females are dark brown all over, and 

 marked like the male." — E. B. 



3. Thamnophilus melanurus, Gould ; Scl. & Salv. P. Z. S. 

 1866, p. 185; 1867, pp. 750, 978. 



Nauta, Upper and Lower Ucayali, Chyavetas, and Santa Cruz 

 (Bartlett) ; Pebas (Hauxwell). 



"Generally distributed throughout the hilly country." — E. B. 



4. Thamnophilus leuconotus, Spix, Av. Bras. ii. p. 28, 

 pi. xxxix. fig. 2 ( 3 ). 



Th. melanoceps, Spix, ibid. ( 2 )• 

 Th. corvinus, Scl. & Salv. P. Z. S. 1866, p. 185. 

 "Upper Ucayali, near Cashiboya, and Santa Cruz. Found about 

 the banks of the small streams. Both sexes obtained : male black, 

 with white shoulder ; female brown, with black head. Having shot 

 a female one day, I obtained the eggs of this fine species by finding 

 one perfect and ready to be laid inside her. The egg has a whitish 

 ground-colour, with elongated streaks and spots of a pinkish or olive 

 brown and grey colours, most predominant at the large end." — E. B. 



