50 EGGS OF NORTH AMERICAN BIRDS. 



Rocky Mountain region of the United States, northward to 

 Alaska. 



301. Willow Ptarmigan, Lagopus lagopus. (Type, Plate 

 VI.) Eggs, 8 to 15, oval, reddish buff, spotted and mottled, 

 usually quite thickly, v/ith large confluent blotches of purplish 

 brown; 1.15 + 1.80 to 1.20 + 1.85. Breeds in Arctic North 

 America, in June. 



301a. Ai.-LEii''s Ptarmigan, Jjagopiis lagojncs allani. Eggs," 

 indistinguishable from those of No. 301. Breeds in Newfound- 

 land. 



302. Rock Ptarmigan, Lagopus rupestris. Eggs, indis- 

 tinguishable from those of No. 801, excepting that they are 

 perhajjs a little smaller; 1.10 -|- 1-55 to 1.12 -|- 1-65. Breeds 

 in Arctic North America. 



302a. Reinhardt's Ptarmigan, Lagopus rupestris rein- 

 hardti. Eggs, indistinguishable from those of No. 302. Breeds 

 in Greenland and on the western shores of Cumberland Gulf. 



302&. Turner's Ptarmigan, Lagopus rupestris atkhensis. 

 Eggs, unknown, but probably indistinguishable from those of 

 No. 302. Breeds on Atkha Island, Aleutian group. 



303. Welch's Ptarmigan, L^agopus welchi. Eggs are, I 

 think, undescribed, but probably resemble those of No. 302. 

 Breeds in Newfoundland. 



304. White-tailed Ptarmigan, Lagopus leucurus. Eggs, 

 8 to 10, oval, or oblong oval, yellowish cream, marked with 

 small rounded spots of deep chestnut, quite uniformly dis- 

 tributed over the entire surface; 1.20 + 1.80 to 1.22 + 1.85. 

 Breeds on the alpine summits of the mountains of Western 

 North America, from New Mexico, northward, into British 

 America. 



305. Prairie Hen, Tympanuchus americanus. Eggs, 8 to 

 15, oval, varying from dirty white to greenish yellow, unspotted, 

 or often finely dotted with reddish yellow; 1.20 -f 1.60 to 1.30 

 -|- 1.75. Breeds on the prairies of the Mississippi Valley, 

 southward to Louisiana, eastward to Kentucky and Indiana, in 

 Mnv. 



