d' . A very distinct frontal shield ; tail- 

 feathers deeompoHed and hidden by 

 the coverts; winfjfs feebly developed 

 and incapable of fli^^ht 9. Megackex, p. 63. 



e' . A small but ovideut frontal shield ; tail 



long ; wings fairly developed ; plumage [p. 03. 



black 10. IIadroptila, 



n. Culinen shorter than the middle toe and 

 claw. 

 c. With no evident frontal shield. 

 /'. Wing-coverts elongated, so as to reach 



almost to tlie tip of the quills 11. 



(/'•. Wing-coverts not reaching nearly to the 

 end of the quills, 

 e". Tarsus greatly exceeding the middle 

 toe and claw in length — in fact, by 

 more than the length of the hind toe . 15. 

 f". Tarsus seldom exceeding the length of 

 the middle toe and claw, generally 

 about equal to it, sometimes longer, 

 but never exceeding it by as much as 

 the length of the hind toe. 

 e'" . Tail distinct, and not hidden by the 

 upper and under tail-coverts. 

 c^. Under wing-coverts and axillaries 

 distinctly spotted or barred with 

 white. 

 rt°. Culmen longer than inner toe 

 and claw. 

 a°. Nostrils longitudinal, very 

 narrow, the nasal aperture 



scarcely perceptible t IG. 



b^. Nostrils very large, oval and 



pervious 17. 



V'. Culmen less than inner toe and 

 claw. 



[p. 64. 



OCYDKOMUS *, 



[p. 69. 

 II1MANTOBNI8, 



[p. 70. 

 Dryolimnas, 



[p. 72. 

 Caniralltjs, 



Secondaries not reaching to 

 the end of the primaries .... 



Secondaries reaching quite to 

 the end of the primaries. 



'7. Wing-coverts vei-y long and 

 soft, hiding the primary- 

 coverts; tail-feathers also 

 soft, and with the webs 

 dissociated ; quills banded 

 like axillaries 19. 



". Wing-coverts ordinarj-, as 

 also the tail-feathers; quills 

 uniform below ; back mot- 

 tled 20. 



18. IIai.i.ina, p. 74. 



[p. 80. 

 Castanolisinas, 



CR£C0P.SIS, p. 81. 



* Somewhere here must be placed the extinct genera 12. Apluinapteryx, 

 p. 08, 13. Diaphorapfcri/x, p. 68, and 14. t.ri/thromachiis. p. tiO. 



t This genus is perhaps not properly included in the Crake?, as it has much 

 the appearance of a true Rail, and may have to be put near Hypofetnidia, as the 

 bill of the AUlabra form is more Ralline than Crecine. 



B 2 



