Vor. Il, Pt. 11] LOOMIS—A REVIEW OF THE TUBINARES 63 
Halocyptena microsoma Coues: LEAST PETREL 
Thalassidroma pelagica (Linneus): SToRM PETREL 
Coves—Procellaria pelagica, I, 80, 90, V, 192; Procellaria Ingubris, 
I, 80, 90, V, 192; Procellaria melitensis, I, 81, 90, V, 192. 
Satvin—Procellaria pelagica, 343. 
GopMaNn—Procellaria pelagica, xxxv, 1, pl. 1. 
Oceanodroma tethys (Bonaparte): GALAPAGOS PETREL 
Oceanodroma macrodactyla W. Bryant: GUADALUPE PETREL 
Oceanodroma castro (Harcourt): Harcourt’s PETREL 
Oceanodroma leucorhoa (Vieillot): LEAcH’s PETREL 
Oceanodroma homochroa (Cowes): ASHY PETREL 
Oceanodroma tristrami Salvin: TRISTRAM’S PETREL 
Seeds fuliginosa, 347, 352; Oceanodroma tristrami, 
Ae ae tristrami, xxxvi, 20. 
The drab patch of the posterior surface of the upper tail- 
coverts, corresponding somewhat to the white patch in Ocean- 
edroma macrodactyla, appears to be a constant character, for 
it is present in each of the five specimens before me—three 
adults and two hornotines from the Leeward Islands, Ha- 
waiian Archipelago. Like the types of O. macrodactyla, two 
of the adults and the hornotines have a cap of dark neutral 
gray investing most of the crown, the occiput, and the upper 
cervix, and contrasting with the deep neutral gray of the 
lower cervix and interscapulars. One of the hornotines (No. 
5652 Stanford Univ.) exhibits the “mottled appearance’? men- 
tioned in the original description of the species, published in 
Mr. Salvin’s monograph. Cymochorea owstoni Mathews & 
Iredale falls within the limits of variation in the Hawaiian 
specimens, the fifth one agreeing with the description’ of 
this nominal species. 
1 Ibis, 1915, p. 581. 
