340 Distribution of Land Birds. [ ZOE 
SAN MIGUEL ISLAND. 
Halizeetus leucocephalus. Sturnella magna neglecta. 
Falco mexicanus. | Clivicola riparia. 
Otocoris alpestris strigata.' Salpinctes obsoletus. 
Corvus corax sinuatus. 
SAN CLEMENTE ISLAND. 
Speotyto cunicularia hypogzea. Pipilo maculatus megalonyx. 
Otocoris alpestris strigata.! Amphispiza belli. 
Carpodacus mexicanus frontalis. Helminthophila celata lutescens(?* 
Melospiza fasciata samuelis(?)*?, Thryothorus bewickii bairdi. 
SAN NICOLAS ISLAND. 
Halizeetus leucocephalus. Corvus corax sinuatus. 
Speotyto cunicularia hypogeea. Scolecophagus cyanocephalus. 
Sayornis nigricans. Salpinctes obsoletus. 
Otocoris alpestris strigata.' 
Many of the above lists are, of course, fragmentary, and conse- 
quently of comparatively little value in drawing any general conclu- 
sions, but I think we are perfectly safe in regarding the following 
forms as characteristic of all the islands in the group: Carpodacus 
mexicanus frontalis, Melospiza fasciata samuelis, Otocoris alpestris 
strigata, Helminthophila celata lutescens, Salpinctes obsoletus and 
Pipilo maculatus megalonyx. To this list the following may be 
added with safety, it appears: Speotylo cunicularia hypog@a, Say- 
ornts nigricans, Sturnella magna neglecta, Corvus corax sinuatus 
and Thryothorus bewickii bairdi. The first question. to be asked is, 
are these characteristic birds, like the plants of the islands, markedly 
southern in character? On the contrary, in general these birds 
appear to be a tolerably even mixture of northern and southern 
forms. If the theory proposed in accounting for the distribution of 
plants upon the islands were to hold for the birds, we ought to find 
the Lower Californian race of the house finch, for example, instead 
of the form typical of the entire State. More remarkable is the fact 
brought to light from the collections made upon the islands by Mr. 
Townsend, that the race of horned larks — which is a common resi-_ 
' Recorded as ©. alpestris insularis by Townsend, 
_* Recorded as M, fasciata clement by Townsend, 
* Recorded as H. celata sordida by Townsend. _ 
