FAMILY RHYNCHOPID^E. SKIMMERS. 



45 



FAHILY RHYNCHOPID^E. 



Skimmers. 



Bill, like blade of a knife, the under mandible the longer ; plumage, 

 black above, white below. 



* Group 1. Wing, 13 to 15 inches long. 



Bill, thin, kuife-like; lower mamlible, the longer; basal halt' of bill, vermilion red, black- 

 ish at tip; upper plumage, black ; uiiderparts, white, lilt y wimps u/ijnt. Black Skimmer. 



See Xo. 54. 



* For directions for measurement, see page 9. 



