1912] Swarth: Birds and Mammals from Vancouver Island 73 



and sometimes tinging the flanks. Broad whitish margin pos- 

 terior to the black facial mask, not sharply defined but frequently 

 extending backwards over the entire crown, and to the nape. 

 Ranges through southern California and southern Arizona. It 

 is possible that the bird found in southern Arizona is recognizably 

 distinct from scirpicola, but the material I have at hand (four 

 adult males, breeding birds, San Pedro River, Cochise County. 

 Arizona! is not sufficient to determine this. It shows the ex- 

 treme accentuation of the color characters of scirpicola, thus 

 approaching the Mexican form G. i. melanops, and is noticeably 

 different from typical occicU ntalis, which occurs commonly in the 

 same region as a migrant (see Swarth, 1904, p. 56). 



Following are measurements of breeding males of G. i. occi- 

 dental's and (!. t. scirpicola, from various localities: 



Geothlypis t. occidental is 



Wing Tail Culmen Tarsus 



Eight males from Vancouver Island, 54.1 51.1 10.07 18.4 



Seven males from Humboldt Co., Nevada, 55.8 53.0 10.8 20.4 



Five males from southeastern Alaska, 55.1 51.3 10.8 19.7 



Gfi othtypis i. scirpicola 



Five males from Los Angeles Co., Cali- 

 fornia, 54.6 51.1 11.2 19.5 

 Four males from Cochise Co., Arizona, 55.6 51.5 11.4 18.9 



Wilsonia pusilla pileolata (Pallas) 

 Pileolated Warbler 



Seen at various points, but always in limited numbers. Speci- 

 mens taken at Errington and the Little Qualicum River in May 

 were probably migrants, but a few were seen about Alberni. and 

 in the Beaver Creek Valley in June, when they were undoubtedly 

 breeding. The few that were seen in the willow thickets in the 

 Golden Eagle Basin in July had, in their manner of occurrence, 

 the appearance of being casual visitants to the region, probably 

 migrants from the valleys below. 



At Friendly Cove, early in August, the species was more 

 abundant than at any other point visited, and a few were seen 

 daily in the willows and shrubbery surrounding the lake back of 

 the village. It was not seen at any point after we left Nootka 

 Sound. 



