COLLURIO 



439 



A. Elaok cheek-stripes involving eyelid only on upper border 



of eye, and not meeting across the forehead. A orescentio 

 patcli of white in the black, beiow the eye ; upper edge 

 of black stripe behind the eye bordered by hoary wnit- 

 ish. Breast and belly always with distinct, transverse 

 waved lines of dusky. Bill, when mature, entirely black. 

 Length about 10 inches. 



Above light ash. Upper tail coverts and forehead much 

 paler than the back, the former without waved 

 lines. Axillars whitish. 



Inner webs of secondaries paler towards edges, 

 but Inot of well-defined white. Concealed 

 bases of tail feathers, except sixth, white. 

 Tarsus shorter than the gape of mouth . borealis, 



B. Black cheek-stripes not involving upper border of eye or 



upper eyelid, which is whitish, and not meeting across 

 the forehead, its upper edge behind the eye with scarcely 

 a lighter border. No patch of white on lower eyelid. 

 Under parts unvaried white ; in female obscurely waved. 

 Base of under mandible whitish. Length about 9 inches. 

 Above light ash. Upper tail coverts and forehead de- 

 cidedly paler than the back. Axillars whitish. 

 Inner webs of all secondaries (except innermost) 

 white to shaft, except for less than terminal 

 half, which is black along the shaft. Con- 

 cealed base of tail white, except on sixth 

 feather. Tarsus equal to the gape . . excubitor 



C. Black cheek-stripes involving upper eyelid, as in A, but 



without patch of white below the eye ; meeting in a nar- 

 row, sometimes inconspicuous line across the forehead, 

 its upper edge behind the eye not bordered by lighter. 

 Beneath plain white, or very obscurely waved in ludovici- 

 anus (the female ?). Bill, when mature, entirely black. 

 Length about 8.50 inches. 



Above dark plumbeous-ash. Upper tail coverts and 

 forehead scarcely paler than the back. Sides and 

 breast tinged with bluish-gray. 



Black of loral space rather hoary along upper 

 border. Frontal dark line inappreciable or 

 wanting. Inner webs of secondaries paler 

 only along the marginal half, and not ab- 

 ruptly white. Axillars plumbeous. Tail 

 feathers, except the innermost, with a con- 

 cealed well-defined white patch at base, 

 largest on the more exterior one. Bill from 

 nostril, .60. Under parts often with very 

 obscure faint waved lines (in the female?). . 

 White patch on wing reaching about to 

 middle of Ist primary. Tarsus equal to the 

 gape ........ ludoviciann 



