ee | Swartu, Marsh Wrens of California. okt 
Los Angeles County: El Monte, 1; San Gabriel River, 1; Los Angeles, 4; 
Bixby, 1. Riverside County: Corona 1. San Luis Obispo County: San 
Luis Obispo, 1. Merced County: Los Bajios, 15. Kings County: Tulare 
Lake, 1. 
Oregon: Netarts, 1; Elmira, 1; Eugene, 1. 
Total, 60. 
Remarks.— The characteristics of the bird and mammal fauna 
of the San Francisco Bay region have been set forth by Grinnell 
(Univ. Calif. Publ. Zodl., vol. 10, 1913, pp. 191-194) in a concise 
summary of conditions at that point, so that there is no need here 
of dwelling further upon the topic. In the paper cited the possi- 
bility is pointed out of the marsh wren of this region proving to 
be different from the recognized Pacific Coast races, a statement 
that is borne out by the present study. 
The naming of this form of Telmatodytes palustris adds another 
to the five distinctive species of vertebrates already known from 
the Suisun region, giving added emphasis to the strongly marked 
faunal peculiarities of the section. The characteristics of the 
marsh wren are again exactly such as occur in the song sparrow, 
meadow mouse, and shrew of the same locality and association, 
namely, an extreme of dark coloration and maximum of size as 
compared with those forms most nearly related and geographically 
closely adjacent. The wren is not so closely circumscribed in its 
habitat as are the song sparrow, meadow mouse, and shrew, its 
breeding range including at least a part of the San Joaquin Valley. 
This is shown by fifteen specimens at hand taken at Los Bajos, 
Merced County, in June, four of which are adults and eleven 
juvenals. The four adults are in excessively worn plumage, but 
though color characteristics are obscured thereby, measurements 
of these birds accord so closely with those of Suisun specimens as 
to leave no doubt as to the subspecific identity of the two series. 
The young birds also are appreciably larger than full-feathered 
juvenals of paludicola from Humboldt Bay. Three non-breeding 
birds from Modesto, Stanislaus County, while not extreme ex- 
amples of @stuarinus, are apparently to be referred to this form 
rather than paludicola. A juvenal from Tulare Lake is not with 
certainty identifiable, but I have tentatively referred it to estuari- 
nus, regarding it as probable that this form inhabits the entire 
San Joaquin Valley. 
