THE GROUND SQUIRRELS OF CALIFORNIA. 



775 



Tehama, Stanislaus, Siskiyou, Monterey, Napa, Sonoma, Humboldt and 

 Lake counties, and by the United States Biological Survey, co-operating 

 with the division in Merced, Modoc, and Shasta counties. Such cam- 

 paigns were held upon application from the horticultural commissioners 

 of these counties, and proved a great help to them by informing the 

 farming population in these counties as to best methods of controlling 

 ground squirrels and other injurious rodents and in aiding their work 

 of protecting the agricultural and horticultural interests of California. 

 Co-operating with the Rodent Control Division and the United States 



Fig. 62. Habitat group, Douglas Ground Squirrel (Citellus douglasi). 



Biological Survey, the farm advisers and farm bureaus of the Uni- 

 versity of California's excellent extension system, have done and are 

 doing splendid work in assisting the farmers. That such campaigns 

 have fully justified the efforts of these agencies, is attested by the sev- 

 eral horticultural commissioners, who state that their subsequent success 

 largely has been due to the educational features of the meetings. 



Following these campaigns, the Rodent Control Division in the month 

 of March asked the 48 county horticultural commissioners for their 

 active support in carrying on a voluntary spring drive against the 

 ground squirrel. This plan was at once welcomed by them, since in 



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