398 rUFFINIDiE. 



Key to the Impedes. 



a. Exposed portion of the outer primary beneath 



more or less dark. 

 a . Bill wide at the gape. 



a" . Entire plumage sooty-brown. 



a'". Larger : bill stout, but not excessively macroptera, p. 399. 



h'" . Smaller: bill very stout aterrima, p. 401. 



b". Under surface more or less white. 



c'". Whole head except region round the 



eye white lessojii, p. 401. 



d'" . Crown more or less dark. 

 a*. Upper tail-coverts white. 



(fi. Jiack of the neck and under surface 



white iKPsitata, p. 402. 



b^. Back of the neck and whole 



plumage sooty-brown jamaicensis, p. 403. 



b^. Upper tail-coverts dark. 

 c\ Under wiiig-coverts dark. 



«''. Throat and neck in front dark 

 like the back ; forehead dark. 

 a' . Dark portion of the plumage 

 rich sooty-brown. 



a^. Larger : wing 11 in rostrata, p. 404. 



b*. Smaller: wing 105 in. .. parvirostris,-^. AQ^. 

 b'' . Dark portion of the plumage 



greyish incerta, p. 405. 



6". Throat and neck iu front, and 



forehead more or less white * . mollis, p. 406. 

 d^. Under wing-coverts inwardly more 

 or leas white, margin dark. 



c". Larger phaopygia, p. 407. 



ct. Smaller. 



(? . Head and neck above blacker, 

 c". Bill more slender ; larger 



under wing-coverts white . bremjjes, p. 408. 

 d^. Bill stouter ; larger under 



wing-coverts mostly dark . hypcleuca, p. 409. 

 d?. Head and neck above pale 



slaty niyrijjennis, p. 409. 



b'. Bill much compressed breviiostris, p. 409. 



b. Exposed portion of the outer primary beneath 



more or less white towards the base of the 

 inner web. 

 c'. Large : bill stout ; entire plumage greyish- 

 sooty ; concealed bases of the feathers of the 



under surface white solandri, p. 410. 



d\ Bill less stout ; under plumage more or less 

 white (except (2?. trinitatis and some forms 

 of CE. negleda). 

 c" . Larger: inner under wing-coverts white 

 (wing about 11"5 in.). 

 e". Margin of the wing beneath also white externa, t^. AW. 

 f". Margin of the wing beneath dark .... cervicalis, p. 411. 



* (E. mayentts, Salvad. & Gigl., probably comes near here. 



