502 



THE DIVING- BIRDS — PYGOPODES. 



Brach3rramphus hypoleucus. 



XANTUS'S GUILLEMOT. 



Brachyrkampkus hypoJcuais, Xantu.s, Pr. Ac. Nat. Sci. Pliiliul. Nov. 18.59, 299 (Cape St. Lucas).— 

 CoUES, lb. 1868, 64 ; 2d Cheek List, 1882, no. 868. — Kidgw. Noni. N. Am. B. 1881, no. 757. 



Hab. Coast of Southern California, from San Diego to Cape St. Lucas. 



Sp. Char. Adult, summer (breeding ?) plumage : Above, uniform dark slaty, the feathers nearly 

 black just beneath the surface, but pale gi-ayish basally ; entire lower parts, including greater part 

 of the lores, orbital region, except above the eye, and auriculars, continuous white. Lining of the 

 wing pure white, the anterior and exterior lesser under coverts with concealed spots of grayish ; 



inner webs of primaries chiefly grayi.sh white. Sides and flanks, beneath the wings, plumbeous- 

 slate, some of the feathers tipped with white. Bill black, the mandible brownish basally ; iris 

 "pale blue" (Xantus, MS.); legs and feet pale brownish gray in the dried skin. Winter j)bh- 

 mage : Similar to the above, but nearly the whole of the lores and orbital-region plumbeous. Bill 

 black, the base of the mandible whitish ; " feet whitish blue, black below " (Cooper, MS.). 



Total length, 10.00 to 10.50 inches ; extent, 15.80 to 19.50 ; wing, 4.50-5.25 ; culmen, .70-.80 ; 

 tarsus, .90-.95 ; middle toe, .85. 



Brachyramphus Craverii. 



CRAVEKI'3 GUILLEMOT. 



Uria Craverii, Salvadori, Descriz. di altre Nuove Specie di Ui;c. Mus. di Torino, 1867, 17 (Lower 



California). 

 Brnchyrhamphus Craverii, CouKS, Pr. Ac. Nat. Sci. Philad. 1868, 66 ; 2(1 Check List, 1882, no. 869. 



— Street.s, Bull. U. S. Nat. Mus. no. 7, 1877, 32 (critical ; habits). — Ridgw. Nom. N. Am. 



B. 1881, no. 758. 



Hab. Coast of the Gulf of California ; Island of Natividad, near the western coast of Lower 

 California. 



Sp. Char. Adult, summer and winter : Above, including the entire lores and orbital region, 

 with upper part of the auriculars, blackish slate ; a longitudinal whitish space on each eyelid. 

 Entire lower parts, except sides and flanks, continuous white ; sides and flanks miiform dull slate 

 or sooty plumbeous. Lining of the wing smoky gray or slaty, the greater under coverts and the 

 tips of some of the smaller coverts, white ; inner webs of primaries grayish white only toward the 

 base. " Bill black ; iris dark brown ; feet green" (Xantus, MS.).^ 



Total length, about 10.25 inches ; extent, 16.00 ; wing, 4.60 ; culmen, .78-.80 ; tarsus, .88-.90 ; 

 middle toe, .80-88. 



' One specimen is marked as above ; on tlie label of another the color of the iris is recorded as "pale 

 blue, nearly white." 



