APPENDIX. 239 
30. Larus argentatus. HERRING GuLLt.— Above, pearl-gray ; 
below, white; bill, yellow, showing a red spot; feet, flesh-color. 
Length about 25, wing about 16. 
31. Larus delawarensis. RING-BILLED GuLt. -— Bill, dull yellow, 
with black band near the tip. Length about 18, wing about 14. 
32. Sterna galericulata. Evecant Tern. — Bill, bright red, 
paling at the tip; legs and feet, black; crown and crest, black; wzder 
parts showing rosecolor. Length about 18.50; wing about 12.25. 
33. Sterna trudeaut, TRupEau’s TEerN.— Bill, orange, marked 
with black; entire plumage, grayish; a band through the eye. 
Length about 12, wing about 9.50. 
34. Sterna forstert. 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. Rhyuchops nigra. BLack SHIMMER.— Above, black; under 
parts, white; bill, red and black; the under mandible much longer 
than the upper; very thin. Length about 18, 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. 
