104 PACIFIC COAST AVIFAUNA No. 12 
means impossible that this species may occur upon the islands occasionally, the 
above unsubstantiated record is inconclusive. 
2 Vireosylva gilva swainsoni (Baird) 
WESTERN WARBLING VIREO 
Vireosylva gilva swainsoni Dawson, Condor, xvii, 1915, p. 204. 
W. L. Dawson states that he heard one of these birds on Santa Cruz during 
the morning of April 4, 1915. This identification is too uncertain to stand as a 
record. 
13. Hylocichla guttata nanus (Audubon) 
Dwarr Hermit THRUSH 
Turdus nanus Cooper, Proc. Calif. Acad. Sci., tv, 1870, p. 78. 
Hylocichla guttata nana Richardson, Condor, x, 1908, p. 68. Linton, Condor, x, 1908, p. 
86. Linton, Condor, x, 1908, p. 129. 
Hylocichla guttata nanus Willett, Pac. Coast Avif., 7, 1912, p. 108. 
It is with considerable hesitation that I place this subspecies in the hypo- 
thetical list. The presence of nanus upon the islands in winter is to be expected, 
and there are several records of its occurrence, but I can learn of no definitely 
identified specimens ever having been taken, and so must include the form con- 
ditionally. 
TABULATION OF SPECIES BY ISLANDS 
To facilitate comparison of the avifauna of the several islands, I have pre- 
pared the following table. Although there are many species which certainly oe- 
cur on all the islands, though recorded from but a few, I have not taken this faet 
into account, having marked with an asterisk (*) only those birds which have 
been definitely reported from the several islands. 
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