ALCIDiE — THE AUKS — ALLE. 463 



Lunda. Deciduous nasal shield rapidly increasing in width toward the top, where form- 

 ing an arched and much thickened ridge ; basal outline of the mandible convex ; maxil- 

 lary sulci and anterior outline of the nasal shield with the concave sides anterior; 

 terminal half of mandible perfectly smooth ; eyelids without horny plates ; adult 

 furnished with elongated, pendent, silky, ornamental supra-auricular tufts. 



Genus ALLE, Link, 



Allc, Link, Beschr. Nat.-Sarnml. Univ. Rostock, I. 1S06, 17 (type, .-/. nigricans, Link, = Aha alle, 



Linn.). — Coctes, Bull. Nmt. Orn. Club, IV. Oct. 1879, 244. 

 Mergulus, Vieii.l. Analyse, 1816, 66 (type, Alca alle, Linn.). 



Char. Size small (wing about four and a half inches). Bill very short ami thick, the culmen 

 strongly convex, the gonys exceedingly short (less than one third the culmen) and straight ; 

 mandibular rami widely separated, the interval tilled by a very broad, densely feathered area, 



gricctn . 



extending nearly to the tip of the hill ; nasal fossae semicircular, the lower third occupied by the 

 nostril. Head, neck, and upper parts black, the- under side of the head and neck white in winter ; 

 lower parts white, and scapulars streaked with white, at all stages. 



The single species .if this genus is the well-known Sea Dove, or Dovekie, abundant along the 

 coast of New England in winter, but breeding much farther north. 



Alle nigricans. 



THE SEA-DOVE; DOVEKIE. 



Ahanllc, Linn. S. N. ed. 10, I. 1758, 131, no. 6; ed. 12, I. 1766, 211, no. 5. — Wils. Am. Orn. 



IX. pi. 74, fig. 5. 

 Uria allc, Pall. Zoog. Rosso-As. II. 1826, 369. — Am. Orn. Biog. V. 1838, 304, pi. 339. 

 Mergulus alle, Vieill. Analyse, 1816, 66; Gal. Ois. 1825, 2S6, pi. 29.".. — Gould, B. Eur. V. 1S:;7, 



pi. 402. —Cass, in Baird's B. N. Am. 1S58, 918. — Baird, Cat, X. Am. 1!. 1859, no. 738. 



Coues, Pr. Ae. Nat. Sci. Philad. 1868, 54 ; Key, 1872, 343 ; Cheek List, 1873, no. 626. 

 A' ca. Candida, Brunn. Orn. Bor. 1761. 26, no. 107 (albino?). 

 Alca <<!,:<, Omel. S. N. I. 17S8, 554. 

 Mergulus melanoleucus, Leach, Syst. Cat. 1816, 42. 

 Mergulus arcticus, Brehm, Vug. Deutschl. 1831, 994. 

 Alle nigricans, Link, Beschr. Nat.-Samml. Univ. Rostock, I. 1806. 17. — Coues, Bull. N'utt. Orn. 



Club, IV. 1879, 244 ; 2d Check List, 1SS2, no. 863. — Kidgw. Nom. X. An.. B. 1881, no. 752. 



