48 



4. MYRMECIZA HEMIMELiENA. 



<y . Castaneus ; dorsi medii pennis basi albis, inde nigris, apice 

 castanets : capite toto undique et corpore subtus ad medium 

 pectus nigris : ventre medio albido : campterio summo et ma- 

 culis tectricum alarium apicalibus albis : rostro nigro, pedibus 

 Jiavis : Cauda rufo-castanea unicolore. 

 ? . Obscure olivacea rufo tincta : interscapulii pennis basi albis : 

 dorso postico, alis et cauda rujis : alarum tectricibus nigris, 

 sicut in mari albo aut fulvescenti-albo guttatis : subtus Icete 

 ferruginea, pectore et ventre medio pallidioribus : lateribus et 

 crisso rufescenti-olivaceis. 

 Long, tota 5'0, alse 2'4, caudae 17. 

 Hab. In Bolivia {Bridges). 

 Mus. Brit. 



There are single specimens of both sexes of this bird in the Bri- 

 tish Museum, which are the only examples I have yet seen. It 

 may be best arranged near Myrmeciza loricata, the type of the genus, 

 with which it agrees generally in form, although the tail is compara- 

 tively much shorter. 



5. FORMICIVORA HJ)MATONOTA. 



Supra brunnea, dorso medio rubro, hoc colore uropygium versus 

 dilutiore : alarum tectricibus nigris, omnibus macula terminali 

 pallide cervina prceditis, secundariarum externarum apicibus 

 eodem colore obsolete terminatis : subtus cinerea, gula nigra 

 maculis triangularibus albis aspersa : ventris lateribus et crisso 

 pallide brunneis : cauda unicolore brunnea : rostro nigro, pedi- 

 bus brunneis. 

 Long, tota 4*0, alas 2*0, caudee 1*2. 



Hab. Chamicurros in ripis fl. Huallaga in Peruv. Orient. (Haux- 

 well). 



Mus. Brit. 



Obs. Similis F. gulari (Spix, Av. Bras. ii. t. 41. f. 2) sed dorso 

 medio rubro nee cinnamomeo, et colore subtus dilutius cinereo dig- 

 noscenda. 



2. On the species of Crocodiltjs inhabiting the rivers 



KWORA AND BlNUE (NlGER AND TsADDa) IN CENTRAL 



Africa. By Dr. Balfour Baikie, F.R.Geog.S. &c. 



Among the Zoological collection which I made during my visit to 

 the rivers Kwdra and Binue in 1854, were several skulls of Croco- 

 diles, varying in length from 14 to 26 inches. A careful compara- 

 tive examination of these shows them all to be possessed of similar 

 characters ; but on attempting to refer them specifically, I have ex- 

 perienced considerable difficulty, their proportional measurements 

 not agreeing with any hitherto described. Two African species of 

 Crocodilus are already known, — C. vulgaris, the Nilotic or Egyptian 



