PLATE I. 
The eggs of the various species of this family dilfer considerably from each other, both in color and markings,, and this variation is 
observable also, even among those in the same nest. Among the Lagopid;c there does not seem to be any typical style of marking to 
designate the species ; as I have never been able to find any two eggs, even when from the same nest, exactly alike ; therefore it has 
seemed desirable to figure several examples of one species so as to exhibit as many of the most striking varieties as possible. The numbers 
which are given below in large type are those belonging to the catalogue of the Smithsonian Institution ; where the types of these plates 
are preserved for future reference.. 
TETKAO UROGALLUS. hlos. 1, 2 (6330. 1378) Avere presented by Alfred Newton,, Esq.,, to the Smithsonian Institution, and were 
obtained from Finland. 
LYRUKUS TETRIX. Nos. 3, 4 (14:55, 3547), also presented by Mr. Newton, were brought from Germany. 
DENDRAGAPUS OBSCURUS. Nos. 5, 6, 7 (2583, A. 2583, B. 2583, O.) were procured by Dr. Keunerly in Washington Territory. 
DENDRAGAPUS RIGHARDSONIl. Nos. 8, 9, 10 (3888, A. 3888, B. 3888, C.) were collected by Captain Reynolds in the Wind 
River ^Mountains, lying to tlie northwest of Foi’t Laramie. 
OANACE CANADENSIS. Nos. 13, 14, 15, 16, 17 (3091, 7616, 7813, 7612, 7615) were brought by Mr. L. Clarke from Fort Rae, 
Great Slave Lake. 
CANACE FRANKLINII. No. 18 (4694) was obtained by Mr. G. Gibbs in Washington Territory. Only three specimens of the egg of 
this species have been discovered. 
PEDIEOAITES COLITMBIANUS. Nos. 19, 20, 21 (5239, 3810, 5238.) The first two came from the neighborhood of Fort Crook, 
California, and the last from Missouri River. 
PEDIECAITES PHASIANELLUS. Nos. 22, 23, 24, 25 (7618, 7620, 7619, 7621.) The first was procured at Fort Resolution, 
south side of Great Slave Lake ; the remainder at Fort Rae, on the north side of the lake. 
CUPIDONIA CUPIDO. Nos. 26, 27, 28, 29, 30 (7027, 7023, 5432, 1880, 4011 .) All of these were obtained in Illinois, except- 
ing the last, which was brought from Arkansas- 
