42 LARID^. 



b^°. Outer web of strea- 

 ■ mertj distinctly gTey. 

 c^^. Dark bands next 

 the shafts on the 

 inner webs of 

 primaries wider 

 and darker ; tar- 

 sus longer than 

 the middle toe 



without the claw Jluviatilis, p. 54. 

 d^'^. Dark bands on 

 inner webs of 

 outer primaries 

 much paler and 

 narrower; tarsus 

 short, not ex- 

 ceeding middle 

 toe without the 



claw macrura, p. 62. 



b^. Bill and feet blackish . . longipennis, p. 67. 



b''. Upper tail-coverts and tail 



gTcy, hke the mantle ; under- 



parts dark vinaceous grey . . albigena, p. 69. 



5'. Inner webs of primaries white 



to the tips ; upper parts very 



pale grey dougalli, p. 70. 



b'" . Size large : wing more than 12 

 inches ; feet black ; feathers of 

 nape prolonged and pointed. 

 d^. Bill black, yellowish towards the 



tip cantiaca, p. 75. 



d*. Bill orange-yellow to red. 



c'. Size larger : wing about 14'5 



inches maxima, p. 80. 



ff. Size smaller: wing less than 

 13 inches. 

 c". Rump and tail grey, like the 



back inedia, p. 86. 



rf". Rump and tail white, con- 

 trasting with the grey of the 

 mantle. 

 e". Bill orange-red ; angle of 

 lower mandible far in ad- 

 vance of the nostril elegans, p. 84. 



d/. Bill chrome-yellow ; angle 

 of lower mandible only 

 slightly in advance of the 



nostril eurygnatha, p. 85. 



b". Front of the forehead white. 

 c". Lores white, 

 e*. Bill greenish yeUow, nape-feathers 

 long. 

 e\ Rump dark grey, like the mantle, bergii, p. 89. 

 /5, Rump white, mantle very pale 



grey bernsfeini, p.. 96. 



/■'. Bill black frontalis, p. 97. 



