Pocket-gopher 



583 



At Carberry, Man., September 8, 1904, on a space 5 

 yards long and i yard wide I counted 7 new mounds less than 

 24 hours old; an average one was 18 inches wide and 3 inches 

 deep. 



In another Sierra valley, September 24, 1899,! saw 15 fair- 

 sized hills thrown up within twenty-four hours, apparently by a 



o 



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,1 *-, 



(f^:^ 



CP :■:. 





^••■r\r^ 



yiibilti : 6<< r$ yds . 



Fig. 171 — Gopher work in Colorado, on a space 24 feet square, .September 16, 1901. 



single Gopher, and scattered with them were 32, so recent, that 

 only one inch of their exterior was dry. All were within a 

 radius of 15 feet. The aggregate of these 47 hills thrown up 

 in two days was not less than 25 bushels of earth. At another 

 camp in the Sierra that same month I examined many large 



