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) 
as follows :— 
343a. FALCO COMMUNIS Gm., 
var. PEALEI Ridg. 
Peale’s Duch Hawk. 
344a. FALCO COLUMBARIUS L., 
var. SUCKLEYI Ridg. 
Suchiey’s Pigeon Hawkh. 
No. 35lc. The authority is Hoopss, Pr. Phila. Acad., 1873, 238, pl. 
5 (lowa). 
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. 
381lb. THTRAO OBSCURUS Say, 
var. FULIGINOSA (Ridg.). 
Sithan Dusky Grouse. 
No. 384. A pale form of Cupidonia, from Texas, has lately been 
characterized (Bull. Ess. Inst., v, 199) :— 
384a. CUPIDONIA CUPIDO (L.) Bp., 
var. PALLIDICINCTA Ridg. 
Texas Prairie Hem. 
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. ASGIALITIS MELODUS (Orp) Capz., 
var. CIRCUMCINCTUS Ridg. 
Missouri Piping Plover. 
No. 400bis. A new species of Mgialitis is described from San Fran- 
cisco by Mr. Ridgway (Am. Nat., viii, 1874, 109). 
400bis. AIGIALITIS MICRORHYNCHUS Ripa. 
Slender-billed Plover. 
No. 401. The American form of 4. cantianus may be considered 
