108 



FAMILY STERCORARIID^E. SKUAS AND JAEGERS. 



GRNUS STERCORARIUS BRISSON. 



3. Stercorarius parasiticus (Linn.). PARASITIC LEGER. 

 Illinois (Bull. Nutt. Orn. Club, Vol. V, p. 31). 



FAMILY LARID^E. GULLS AND TERNS. 

 SUBFAMILY LARINvE. GULLS. 



GENUS RISSA STEPHENS. 



4. Kissa tridactyla (Linn.). KITTIWAKE GULL. 



Illinois and Wisconsin, rare winter visitor (Nelson N. E. 111., p. 146); Ohio, 

 rare winter visitor (Wheaton, p. 549) ; Michigan, rare (Gibbs, p. 495). 



GENUS LARUS LINNAEUS. 



5. Lams marinus -Linn. GREAT BLACK-BACKED GULL. 



Illinois, winter resident (Nelson, N. E. 111., p. 145) ; Ohio, rare winter visitor 

 (Wheaton, p. 547); Michigan, rare (Gibbs, p. 495). 



6. Larus argentatus flrunn. HERRING GULL. 



Illinois, rare winter visitor (Nelson, N. E. III., p. 145). 



7. Larus atricilla Linn. LAUGHING GULL. 



Illinois, rare summer visitor southward (Ridgway Cat., p. 202) ; Michigan, 

 abundant (Gibbs, p. 495). 



GENUS XEMA LEACH. 



8. Xema sabinii (Sab.). SABINE'S GULL. 



Illinois, rare winter visitor to Lake Michigan (Ridgway Cat., p. 202); Ohio, 

 accidental on Lake Erie (Wheatou, p. 552). 



SUBFAMILY STERN IN^E. TERNS. 



GENUS GELOCHELIDON BREHM. 



9. Gelochelidon nilotica (Hasselq.). GULL-BILLED TERN. 



Illinois, rare summer visitor (Ridgway Cat., p. 202) ; Ohio, rare visitor north- 

 ward (Wheaton, p. 552) ; Michigan, not rare summer visitor (Gibbs, p. 496). 



GENUS STERNA LINN.EUS. 

 Subgenus THALASSEUS Boie. 



10. Sterna tschegrava Lepech. CASPIAN TERN. 



Illinois, winter visitor (Ridgway Cat., p. 202); Michigan, accidental (Gibbs, 

 p. 495). 



Subgenus ACTOCHELIDON Kaup. 



11 Sterna maxima Bodd. ROYAL TERN. 



Illinois and Wisconsin, summer visitor (Ridgway, p. 202) ; Michigan, rare 

 summer visitor (Gibbs, p. 495). 



