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. Inst., v, 201) 

 an follows : — 



343a. PALCO COMMUNIS Gm., 



Va7'. PEALEI Kidg. 



Feale'is ]>uck HaM'k. 



344a. FALCO COLUMBARIUS L., 

 var. sucKLEYi Kidg. 

 Suckley'ii Pig-eon Kai^rk. 



No. 351c. The authority is Hoopes, Pr. Phila. Acad., 1873, 238, pi. 

 5 (Iowa). 



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

 characterized (Bull. Ess. lust., 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 (Kidg.). 

 SItkaii Dusky Orouse. 



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

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



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



var. PALLIDICINCTA Kidg. 



Texas Prairie Hen. 



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

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

 the black pectoral band complete. 



400a. iEGIALITIS MELODUS (Ord) Cab., 

 var. CIRCUMCINCTUS Kidg. 

 Missouri Piping- Plover. 



No. 400bis. A new species of uEgialitis is described from San Fran- 

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



400bis. .aJGIALITIS MICRORHYNCHUS Kidg. 

 Slender-billed Plover. 



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



