Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
"Microtus californicus"
Hooper
1 mi. E mouth San Pablo Cr. (salt marsh),
Contra Costa Co., Calif.
Oct. 25, 1936
Out of 100 "Benson" live traps placed
in runways in Salicornia caught
1 Microtus. Bait oatmeal.
Giant (salt marsh), Contra Costa Co., Calif.
Feb. 15, 1937 "one"
Took 3 specimens from traps baited
with oatmeal and placed in runways
in Salicornia. Runways exceedingly
abundant but many holes
filled with water - probably due
to long, heavy rains. R. megalotis
and M. musculus also taken.
1 mi. W Avon (salt marsh), Contra Costa Co., Calif.
Feb. 28, 1937
2 taken in Typhae, 2 in Salicornia.
Runways about as abundant as
at Giant marshes. Some holes
filled with water just as at Giant.
- No embryos found to date (Oct.
25, 1936 - Feb. 28, 1937).