26 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY 



Sterna antillarum (Less.). 

 Least Tern. 



The Least Tern also, if I am not mistaken, is now reported for the first 

 time from Lower California, where, however, its presence is not surprising since 

 it breeds abundantly on the coast of California as far northward, at least, as 

 Los Angeles count}^ while it ranges southward along the western coast of 

 Central America. 



Mr. Frazar found it only at San Jose del Cabo, where, between September 6 

 and 12, six specimens, including both young and old birds in autumn plumage, 

 were taken. He speaks of it in his notes as "not common, but yet more 

 numerous than any of the other Terns observed at San Jose." 



HydrochelidoD nigra surinamensis (Gmel.). 

 Black Tern. 



This is the fourth species of Tern which Mr. Frazar has added to the fauna 

 of Lower California. Like the other three, it was seen only at San Jose del 

 Cabo, where it was " rare." A specimen was taken on the 6th and another 

 on the 17th of September. 



The Black Tern was found by Mr. Grayson " at Mazatlan, where it makes 

 its appearance in September and October, and where it remains through the 

 winter months." Dr. Cooper states that it " migrates through the interior 

 valleys of California, and that some probably breed about the marshes within 

 the State, especially in the mountains, as he met with it on the head-waters 

 of the Mohave River as late as the 7th of June." i Hence it is possible that 

 Lower California lies nearly in the direct path of one of its regular lines of 



migration. 



PuflBnus opisthomelas Coces. 

 Black-tented Shearwater. 



Puffinus opisthomelas CocES, Proc. Acad. Nat. Sci. Tliila., 1864, 139-141 (orig. descr. ; 

 types from Cape St. Lucas). Elliot, Illustr. New and Unfig. N. Amer. Birds, 

 II. 1869, introd. (descr. ; figures head of specimen from Cape St. Lucas). 



P.[uffi)tus] opisthomelas Cooes, Loc. cit., 144 (descr. ; Cape St. Lucas). 



Puffinus gavia (not Procellaria gavia Forster) Bryant, Proc. Calif., Acad. Sci., 

 2d ser., IL 1889, 87 (Cape St. Lucas). 



" A large number of medium-sized, white-breasted and dark-backed Shear- 

 waters," seen by Mr. Frazar between the islands of Carmen and Montserrat on 

 March 6, and a few off the northern end of Espiritu Santo Island on ^^larch 18, 

 1 Baird, Brewer, and Ridgway, Water Birds N. Amer. II. 1884, 321. 



