92 THE BIOLOGY OF HARDING COUNTY 



Large-eared Bat ( Corynorhinu s macrotis pallescens Miller). 

 Several made Ludlow Cave their home in early September, 1912. 

 One was sent to the biological survey for determination. 



Hoary Bat (Mycteris (Lasiiirus) cinereus). This very large 

 bat is doubtless a migrant to this area. I saw an individual, I be- 

 lieve, of this species late in August, in a plum thicket (a speci- 

 men taken in July at the mouth of the Moreau River has been 

 determined by the Biological Survey.) 



VI. A PRELIMINARY LIST OF THE REPTILES AND 

 AMPHIBIANS OF HARDING COUNTY. 

 By S. S. Visher. 



Prairie Rattle Snake (Crotahis confluentus). After ques- 

 tioning many persons we concluded that where several rattles are 

 killed in a year on a quarter section rattlers are considered to be 

 "very abundant." One may drive or ride a couple hundred miles 

 without seeing one. Mr. Over reports an interesting case of 

 abundance. In the summer of 1912 he saw not a one until early 

 in August ; nor another until October first. During the first two 

 weeks of October he killed 27 in a very limited locality. 



Bull Snake (Pityophis catenlfer sayi)* The "yellow gopher" 

 snake is the most abundant of the snakes, except along some of 

 the streams where the garter snake is more plentiful. 



Blue Racer (Bascanion constrictor flaziventris) . Occasional 

 on the plains. 



Western Hog-nosed Adder (Heterodon nasicus). Fairly fre- 

 quent on the sandy portions of the floodplains. 



Garter Snake. (Thamnophis sirtctlis}. The most abundant 

 snake ; along all streams. 



Horned Lizard (Phrynosoma douglassii hcrniandesi) . Horned 

 "Toads" are according to my experience quite common in this 

 general area, though large sections seem to be without them. 

 I have found them chiefly in the rougher portions of the steppe 

 about such buttes as Wage Pole butte and on the borders of 

 badlands. 



Mud Turtle or Terrapin (Malococlemnys geographica). 

 Plentiful in streams. 



*Specimens of these varieties were determined by Dr. Alx. Ruthven 

 of the U. of Michigan Museum. 



