96 THE BIOLOGY OF HARDING COUNTY 



Agriolimax campestris Binn. Slim Buttes. 



Bifidaria armifera Say. Wooded ravines in Slim Buttes. 



Bifidaria armifera agna P. & V. Wooded ravines near Antelope 



Creek. 

 Bifideria armifera var. abbreviata Str. Shady places in Slim 



Buttes. 



Zonitoides arboreus Say. Wooded ravines in Slim Buttes. 

 Pyramidula cronkhite var. anthonyi Pils. Collected in moist shady 

 places in Slim Buttes, West Short Pine Hills and at Camp 



Crook. 



IX. NOTES ON ANIMALS AND PLANTS OF ECONOMIC 



IMPORTANCE. 

 BY S. S. VISHER. 



i. ANIMALS OF PREY. 



(a). The gray wolf is moderately plentiful, and because of 

 the proximity of rough lands will probably continue to give some 

 trouble to horse and cattle raisers for some years to come. 



(b) Coyotes are plentiful. However, fences that are coyote 

 proof are not difficult to make. 



(c) Weasels and skunks are especially feared by poultry rais- 

 ers. Since their activities are limited to the hours of darkness, 

 precautions can easily be taken against their entrance. 



(d) Hawks and owls are, with a couple of exceptions, very 

 great allies of the farmer, because they live on gophers and 

 rabbits. Consequently, they ought by all means be permitted to 

 live. The only owl which is destructive to poultry is the very 

 large Horned Owl which is occasionally seen in this area. The 

 Sharp-shinned Hawk, a rather small, swift-flying hawk, is the 

 only one found at all regularly here, which merits destruction. 

 Persons who discriminately shoot every hawk or owl that they 

 can get at are extravagant to say the least. 



(e) All the snakes are useful. The only one that has any 

 serious faults is the rattler. Even they do much good, and ex- 

 ceedingly rarely do any damage. However, they are rapidly ap- 

 proaching extinction. 



