MAP 33— RANGE OF THE POCKET-GOPHERS. 



Founded chiefly on U. S. Biological Sur\-ey maps by Dr. C. Hart Merriam and Vernon Hailey in N. A. Fauna, No. 8, with assistance 

 from maps in Doc. 132, Senate, IQ07. and records by E. '!'. Seton. 



The map includes all of the Family that come north of the Me.\ican Boundary. It is diaKrammatic — as many of the groups overlap. 

 The western area contains 47 different species of Thomomys not yet sufficiently known for mapping. Gcomys bursarius Shaw, comes very 

 near, but does not quite reach Manitoba. 



The northmost area is the range of Thomomys lalpoiJcs, with its 2 races. 



5G3 



