APPENDIX TO CHECK LIST. 133 



Nos. 343, 344. The dark northwest coast forms of duck hawk and 

 pigeon hawk respectively have been named (Bull. Ess. lust., v, 201) 

 as follows : 



343a. PALCO COMMUNIS GM., 



var. PEAT.EI Kidg. 

 Peale's Duck Hawk. 



344a. PALCO COLUMBABIUS L., 



var. SUCKLEYI Ridg. 

 Buckley 's Pig-eon Hawk. 



No. 351c. The authority is HOOPES, Pr. Fhila. Acad., 1873, 238, pi. 

 5 (Iowa). 



No. 381. A dark form of Tetrao obscurus, from Sitka, has lately been 

 characterized (Bull. Ess. Inst., v, 199) : it is more like true obscurus 

 than like var. richardsoni, having the broad terminal slate bar of the 

 tail. 



381b. TETRAO OBSCURUS SAY, 



var. FULIGINOSA (Ridg.). 

 Sitkan Dusky Grouse. 



No. 384. A pale form of Cupidonia, from Texas, has lately been 

 characterized (Bull. Ess. Inst., v, 199) : 



384a. CUPIDONIA CUPIDO (L.) BD., 



var. PALLIDICLNCTA Ridg. 

 Texas Prairie Hen. 



No. 400. A variety of this species is described by Mr. Ridgway, 

 (Am/ Nat., viii, 1874, 109), as A. melodus var. circumcinctus, having 

 the black pectoral band complete. 



400a. JBGIALITIS MELODUS (ORD) CAB., 



var. CIRCUMCINCTUS Ridg. 

 Missouri Piping- Plover. 



No. 400bis. A new species of jEgialitis is described from Sar Fran- 

 cisco by Mr. Ridgway (Am. Nat., viii, 1874, 109). 



400bis. ^IGIALITIS MICRORHYNCHUS RIDG. 

 Slender-billed Plover. 



No. 401. The American form of j3S. cantianus may be considered 



