272 APPENDIX OP 



ORDER VII. CANTATRICES. 



FAMILY XVI. TURBINE. 



GENUS IXOS. 



Bill shorter than the head, rather slender, depressed 

 at the base, compressed toward the end ; upper mandible 

 with the ridge narrow, the dorsal line arched and de- 

 clinate, the sides convex, the nasal sinuses large, the 

 edges sharp, with the notches distinct but small, the 

 tip acute and declinate ; lower mandible with the angle 

 rather large, the dorsal line straight, the tip pointed. 

 Nostrils oblong, direct in the fore part of the nasal mem- 

 brane, which is bare anteriorly. Eyes of moderate size, 

 eyelids partially bare. Aperture of ear rather large, 

 roundish. Head ovato-oblong ; neck rather short; body 

 moderate ; tarsus short, slender, compressed, with a long 

 plate and four scutella, of which the lower two are 

 divided ; toes small, hind toe proportionally large, 

 shorter than the tarsus, third toe longer, lateral nearly 

 equal ; claws slender, faintly grooved, arched, acute. 

 Plumage rather blended, distinct bristles at the base of 

 the bill ; wings rounded, with the first quill very small, 

 the fourth, fifth, and sixth longest and nearly equal, tail 

 moderate or rather long, nearly even. 



The species of this genus, African and Indian, appear 

 to me to be as much Flycatchers as Thrushes. I have taken 

 the above generic characters from skins of Ixos aurigaster 

 and Ixos haemorrhous in my collection. 



326. Ixos AURIGASTER. GOLD- VENTED THRUSH. 



Adult with the feathers of the forehead and crown 

 slightly elongated ; the bill, tail, toes, and claws, black ; 

 the head blackish-brown, the neck, back, wings, and tail- 

 feathers, uniform umber-brown ; the throat and fore-neck 

 clove-brown, the breast lighter, passing into dull white ; 

 the feathers under the tail bright-yellow. 



Male, 88, . . , 3, , ^, fa 



The above, with exception of the measurements which 

 I have taken from a skin, are the principal particulars of 



