ALCID.E — THE AUKS — BRACHYRAMPHUS. 499 



\, Tarsus inucli shorter than the luichlle toe without its claw. 



1. B. marmoratus. Wing, 5.00 inches; cuhuen, .60-70 ; depth of bill at anterior end of 

 nostril, .24 ; width at same point, .15 ; tarsus, .70 ; niicUlle toe, .92-1.00. Summer rilu- 

 viage: Dusky above, barred with rusty ; below, mixed wliite and fuliginous. JFinfer plu- 

 mage : Above, dusky, interrupted by a white nuchal collar ; feathers of back, etc. tipix-d 

 with plumbeous. Entire lower parts white. Hab. Pacific coast, south to Santa Cruz Cal. 

 2. B. Kittlitzi. Wing, 5.10-5.80 inches ; culmen, .40-.45 ; depth of bill at anterior end of 

 nostril, .20-. 22 ; widtli at same point, .15 ; tarsus, .60-.(55 ; middle toe, .85-.95. Summer 

 plumage: Above, itlumbeous, witli indistinct narrow l)ars of black and very irregular 

 (mostly longitudinal) spots of creamy Iniff ; lower parts chiefly white, the jugulum and 

 entire sides strongly overlaid l)y creamy buff, and lieavily, but irregularly, barred and 

 spotted with blackish ; other lower parts (except anal region and crissuni) more faintly 

 marked with liars (mostly cresrentic) of grayish dusky. J Finter plumage : Abijve, plum- 

 beous, the back and rump indistinctly and mirrowly barred with white ; entire side of 

 head (including whole of lores and superciliary region), narrow but distinct michal collar, 

 and entire lower parts immaculate pure white ; sides of breast crossed by a Ijroad band of 

 grayish slate, narrowing toward middle of jugulum. Bill black ; iris brown ; feet light 

 brown in dried skin (livid purplish gray in life ?). Hab. From Northern Japan and 

 Kamtschatka to Unalashka. 

 [3 I B. brevirostris.i Wing, 5.25 inches ; culmen, .50 ; tarsus, .50. Adult, summer plu- 

 mage: Above, grayish brown, the head and back spotted with white ; Ijelow, white, waved 

 and spotted with brown ; bill Idack ; feet yelh^w, the webs and claws brown. Hab. San 

 Bias, W. Mexico.] 



B. Tarsus equal to the middle toe, without claw. 



4. B. hypoleucus. Wing, 4.50-5.25 ; culmen, .70-.80 ; tarsus, .90-.95 ; middle toe, .85. 



Lining of wings white ; above, plain dark slaty ; below, wholly pure white. Hab. San 

 Diego to Cape St. Lucas. 



5. B. Craverii. Wing, 4.60; culmen, .78-.80 ; tarsus, .88-.90 ; middle toe, .80-.88. Lining 



of wings smoky gray or slaty. Otherwise similar to B. hypoleucus. Hab. Lower Cali- 

 fornia. 



Brachyramphus marmoratus. 



THE MARBLED GUILLEMOT. 



Colymbus marmoratus, Gmel. S. N. I. ii. 1788, 583, no. 12. 



Brachyramphus (Apobapton) marmoratus, Brandt, Bull. Ac. St. Petersb. IL 1837, 346. 



Brachyrhaniphus marmoratus, Gr\y, Gen. B. III. 1849, 644. — Cass, in Baird's B. N. Am. 1858, 



915. _p,AiRD, Cat. N. Am. B. 1859, no. 732. — Coues, Pr. Ac. Nat. Sci. Philad. 18G8, 61; 



Key, 1872, 344; Check List, 1873, no. 629 ; ed. 2, 1882, no. 866. — PaDGW. Nom. N. Am. B. 



1881, no. 755. 

 Cepphus pcrdix. Pall. Zoog. Rosso-As. II. 1826, 351, pi. 80. 

 Brachyramphus WrangcU, Brandt, Bull. Ac. St. Petersb. 1 1. 1837, 344. —Cass, in Baird's B. N. 



Am. 1858, 917. — Baird, Cat. N. Am, B. 1859, no. 733. — CoUES, Pr. Ac. Nat. Sci. Philad. 



1868, 63. 

 Uria Townsendii, AuD. Orn. Biog. V. 1839, 251, pi. 430 ; B. Am. oct. ed. VII. 1844, pi. 475. 



Hab. Coasts and islands of the North Pacific, south, on the American side, to San Diego, Cal. ; 

 breeds at least as far soutli as Vancouver's Island. 



Sp. Char. Adult, full brecding-plurruige : Above, dusky, the back, scapulars, rump, and upper 

 tail-coverts barred with rusty, the tips of the feathers being of this color. Lower parts fuliginous, 

 more or less mixed with white, the underlying portion of the feathers being of the latter color ; 

 the lower parts never uniform fuliginous, but usually with this color largely predominating. 



1 Brachyrhamphus brevirostris. — Short-billed Guillemot. 



Uria brevirostris, ViG. Zool. J.iur. IV. 1828, 357 ; Zool. Beechej^'s Voy. 1839, Orn. p. 32 (San 

 Bias). (This is possibly the same as B. Kittlitzi.) 



