APPENDIX. 239 



30. Lams argentahts. Herring Gull. — Above, pearl-gray; 

 below, white; bill, yellow, showing a red spot; feet, flesh-color. 

 Length about 25, \\;ing about 16. 



31. Lams dclawarcnsis. Ring-billed Gull. — Bill, dull yellow, 

 with black band near the tip. Lengtlr about icS, wing about 14. 



32. Sterna galeric7tlata. Elegant Tern. — Bill, bright red, 

 paling at the tip ; legs and feet, black ; crown and crest, black ; wider 

 parts shoiving rose color. Length about 18.50, wing about 12.25. 



33. Sterna trudeani. Trudeau's Tern. — Bill, orange, marked 

 with black ; entire plumage, grayish ; a band through the eye. 

 Length about 12, wing about 9.50. 



34. Sterna forsteri. Foster's Tern. — No black cap ; under 

 parts, white; a black band through the eye; bill dark. Length 

 about 12.50, wing about 10. 



35. Rhynehops nigra. Black Shimmer. — Above, black; under 

 parts, white; bill, red and black; the under mandible much longer 

 than the upper; very thin. Length about iS, wing about 14. 



36. Podilymbus podiceps. Pied-billed Grebe. — Bill with black 

 bar; black patch on the throat; upper parts dark; under parts, 

 white, sometimes marked with dusky. Length about 13, wing 

 about 5. 



