FAMILY RHYNCHOPI1XE. SKIMMERS. 



45 



FAfilLY 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, knife-like; lower mandible, the longer; basal half of bill, vermilion red, black- 

 ish at tip; upper plumage, black ; uuderparts, white. Rhynchops nigra. Black Skimmer. 



See No. 54. 



* For directions for measurement, see page 9. 



