29 



Section A. TROCHILI SERRIROSTRES. 



Sheath of the maxilla serrate towards the anterior portion of the 

 tomia ; the sheath of the mandible sometimes similarly serrate. 

 (For Sec. B, see p. 114 ; Sec. C, see p. 256.) 



Key to the Genera. 



a. Bill cuneate, wide at the base, and gradually 



compressed towards the tip. 

 a'. Tail cuneate ; nasal covers completely 



hidden 1. Heliothbix, p. 30. 



h' . Tail rounded ; nasal covers partly exposed. 2. Schistbs, p. 33. 

 c'. Tail square ; nasal covers fully exposed. . 3. Augastes, p. 35. 



b. Bill with the sides subparallel, drawn to- 



gether rather abruptly towards the tip. 

 d'. Tomia of both maxilla and mandible more 

 or less distinctly serrate ; under surface 

 always plain, without glittering hues. 

 a" . Bill long and nearly straight. 



a'". Tail long and rounded ; bill slightly 



depressed, strongly hooked and [p. 8G. 



deeply serrate ; sexes similar .... 4. Rhamphodon, 

 b'". Tail short and rounded; bill shghtly 

 upturned, strongly hooked and 



deeply serrate ; sexes similar .... 5. Androdon, p. 37. 

 c'". Tail very short and rounded ; bill 

 slender and slightly upturned; no 

 terminal houk ; serration feeble ; [p. 38. 



forehead of male glittering 6. Hemistephania, 



b" . Bill long and arched ; tail rounded ; 



sexes similar 7. Glaucis, p. 41. 



e'. Tomia of mandible only distinctly serrate 

 towards the distal end ; under surface 

 usually glittering. 

 c''. Interramal space nude ; culmen bare to 

 the base ; nasal covers fully exposed. 

 d'". Tail normal, rounded or forked. 



a^. Bill nearly straight, short. [p. 44. 



a\ Smaller ; rectrices narrower . . 8. Chlorostilbon, 



b'. Larger ; rectrices wider 9. Sporadin us, p. 57. 



6'. Bill longer, slightly decurved. 



c\ Sexes dissimilar 10. Iache, p. 59. 



d^. Sexes similar ; male with female 



plumage 11. Phjeoptila, p. 63. 



e'". Tail abnormal; the subexternal pair 



of rectrices very long 12. Aithurus, p. G4. 



d'' . Interramal .space feathered. 

 /'". Bill slender ; tomia of maxilla roUed 

 inwards near the tip ; sexes dis- 

 similar, 

 c*. Tail more or less rounded. 



e\ Bill nearly straight ; lateral rec- 

 trices white at the base. 

 ff". Crown pure white ; feathers 



full, extending over the nasal [p. 00. 



covers 1.3. Microchera, 



i°. Crown black; nasal covers par- [p, 67. 



tially e.xposed 14. CAixiPHARrs, 



