20 



ORNITHOLOGICAL EXPLORATIONS. 



No. 92934.— BUI dark, almost blackish, bluish gray, with a light spot on gonys in front of tlie angle. 

 Feet liglit bluish pearl-gray, with a faint yellowish tinge iu front (not greenish, howevei); joints 

 darker bluish gray, underneath blackish gray. 



6. Uria troile californica (Bryant). 



1822.— Urla troile Choris, Voy. Pittor., AMout., pi. xx.— Uria t. Blakist. & Fryer, 

 Ibis, 1878, p. 211.— lid., Tr. As. Soc. Jap., VIII, 1880, p. 180.— /id., Ibid., X, 

 1882, p. 91. — Blakist., Amend. List B. Jap., p. 32 (1884). — Lomvia t. Bean, 

 Pr. U. S. Nat. Mus., 1882, p. 172. 



1859. — Uria briinnichii Heermann, Pacific R. R. Rep., X, Route to Calif. B. (p. 75), 

 (?iec Sab.). 



1861. — Catarractcs californicns Bryant, Pr. Bost. Soc. N. Hist., 1861, p. 142. — Uria c. 

 Dale & Bannist., Tr. Chicag. Acad., 1,1869, p. 309.— Finscii, Abb. Brem. 

 Ver., Ill, 1872, p. 77.— Dale, Avif. Aleut. Isl. Unal. eastw., p. 10 ri873).— /d., 

 Avif. Aleut. Isl. west. Uual., p. 10 (1874).— Stejnegeu, Naturen, 1884, p. 54. 



1872. — Lomvia troile var. californica Coues, Key N. Anier. B., p. 346. — Id., iu Elliott's 

 Aff. Alaska, p. 210 (1875).— Elliott, Mouogr. Seal Isl., p. 135 (1882).— Nel- 

 son, Cruise Corwin, p. 117 (1883). 



The California Guillemot occurs only in very limited numbers on the 

 rookeries among the enormous masses of U. arra, the thick-billed spe- 

 cies. Nothing- particularly can be said about the present bird, as it is 

 practically undistiuguishable from the arra when on the rookery. Ap- 

 parently they arrive, breed, and depart in company with the common 

 arra, and are also found at sea around the islands like the latter during 

 winter-time, as the specimen in my collection proves. 



List of specimens collected. 



Tjfo. 89092. — Iris dark brown. Feet light yellowish gray, webs darker. Bill black ; angle of mouth 

 yellowish. 



Ko. 92944. — Iris dark brown. Bill blackish brown, somewhjit lighter on the middle of gonys. Feet 

 light yellowish to browTiish gray, joints and webs a little darker, tarsus and toes below blackish. 

 Sexual organs indistingaishable.' 



