78 



ORDEES OP MAMMALS— GNAWING ANIMALS 



burrows. As elsewhere noted, they are often 

 heard barking after they have gone in. 



"The burrow was opened the day after bi- 

 sulphide of carbon had been used for destrojdng 

 the animals, and the material carrying the bi- 

 sulphide was found at the bottom of the vertical 



"■ ■ at;- 



serve to hold its numbers in check. The most in- 

 veterate of these appear to be the coyote, badger, 

 black-footed ferret and rattlesnake." 



The Woodchuck, or Ground-"Hog,"' is tol- 

 erated on the farms of New England because he 

 is wise enough to live on clover and other grass. 





l^. Mound- 



B. Fiinjiytl -jha/ied cnCrarue/Co burrow 



C. Mauvnassaq^4-'i inch.in/duarteter 

 _ ab-oui IS :{cd, lit length- , , ., 

 U. Horizontal itassageS'/zhamUncith. 



E. U.miitoine!UfilU(LuiUhtarlki.rduM. 



F. llnmtdiiarl ofhorUortbtlfUiiscMe 



thU,tdnth-tca-thUcl4-fKtlong) 

 G .Niche IcayK aioicak-for omfirainidag- 



W.NutofarcU^(llinchiii,dMmcttr6y3iiv- 



chei in height) 

 \^,AbiOrHlii matter rurrying buutiihuie 



uf car bow. 

 K .Fo&ilipn ofB-oarie doers as found after 



use of&LSiafiliide ofxarboiv 

 \^M]dk ofhonzontalpcuscwt, itfcit 







PKAIRIB-" DOG " BURROW. 

 From Dr. C. Hart Merriam, "Yearbook," Department of Agriculture, for 1901. 



part, just where the horizontal part turns off. 

 Two dead animals were found, one in the hori- 

 zontal part, the other in the nest, as indicated 

 by the letter K in the diagram. 



"The Prairie-Dog has several natural enemies 

 which, when not interfered with by man, usually 



and let the vegetable gardens alone. In the East 

 he is the only representative of the marmots. 

 In form he is short and stout, and his flat head 

 and beady, black eyes give him a surly look. He 

 is not hvely and cheerful in his habits, hke a 

 ' Mar-^mo'ta mo'nax. 



