134 BIRDS FROM PACIFIC COAST TOWNSEND 



neck mottled by the gradual blendiug of white and black. Wing, 8.75 ; 

 tail, 3.15; culiuen, 1.20; tarsus, 1.70. 



Type, No. 117540, 9 , U. S. Nat. Mus. Clarion Island, March 4, 1889. 

 C. H. Townsend. 



More than twenty of these birds, attracted doubtless by the electric 

 lights, came on board the Albatross during the night we anchored off 

 Clarion Island. It is a common species about the islands of the Revilla- 

 gigedo group. Five specimens. 



Asio accipitriniis (Pall.)- 



One specimen, 9 , March 4; no others seen. 



Heteractitis incauus (Gmel.). 



Common ; three specimens, March 4. 



Himantopus mexicanus (Mull.)- 



One specimen, March 4 ; a large flock seen. 



Fregata aquila (Linn.). 



Large commuuities of these birds occupy the bushes and rocks in some 

 parts of the island, and doubtless breed there. One specimen, March 4. 



Sula, sp. 



Two or three species of " booby" abound at Clarion Island and breed 

 there, as we found many nests and young. No specimens were collected, 

 but it is likely that the S()ecie8 are the same as those of San Benedicte 

 Island, where we obtained 8. piscator, S. breivsteri, and *S'. cyanops. 



Corvus, sp. 



Several crows or ravens were seen at Clarion Island, which I re- 

 member as apparently smaller than the ravens collected at San Bene- 

 dicte Island. No specimens could be secured. 



II. Socorro Island. 



Oceanodroma socorroensis sp. nov. 



Sp. Char. — Adtilt male : Similar to 0. homochroa, but wings longer; 

 tail shorter and less deeply forked ; tarsus and toes shorter ; sides of 

 rump ivhitish; no white on under surface of wings. 



Wing, 5.50; tail, 2.75, forked for .50; culmen, .55; tarsus and toes, 

 .85. 



Type, No. 117497, c5 , U. S. Nat. Mus. Socorro Island, March 8. C. 

 H. Townsend. 



Only one specimen of this petrel was secured and very few others 

 were seen, but some of the hills of the western end of the island are lit- 

 erally honeycombed by the burrows of some creature, which I am con- 

 strained to believe is this bird. The most diligent search failed to re- 



