170 BULLETIN 175, UNITED STATES NATIONAL MUSEUM 



3. Beaver, Millard, Juab, Uinta, and Grand Counties, Utah; Montrose 



and Mesa Counties, Colo., and Esmeralda, Ormsby. Nve and 

 Washoe Counties, Nev. 



4. Humboldt, Elko, and White Pine Counties, Nev.; and Salt Lake 



Utah, and Weber Counties, Utah. 



40 32 59 15 24 



33-35-23 



31-35-25 



31-35-23 



31-33-23 



31-33-22 



31-33-21 



29-33-24 



29-33-23 



29-33-22 



29-33-21 



31-31-23 



31-31-22 



31-31-21 



29-31-23 



29-31-22 



29-31-21 



28-31-23 



27-31-23 



27-31-22 



27-31-21 



29-29-23 



29-29-21 



28-29-21 



28-29-20 



27-29-23 



27-29-22 



27-29-21 



27-29-19 



Region No. 



Figure 73.— Geographic variation in number of scale rows 

 in Pituophis catenifer deserticota. 



Figure 74.— Geograplaic variation in number of 

 ventrals in Pituophis catenifer deserticota. 



5. Harney and Malheur Counties, Oreg.; and Elmore, Adams, Ada, Bear 



Lake, Twm Falls, Blaine, and Owyhee Counties, Idaho 



6. Umatillo County, Oreg.; Nez Perce County, Idaho; and Asotin, 



Walla Walla, Spokane, and Whitman Counties, Wash. 



Although the range of variation in the number of scale rows is 

 remarkable throughout the geographic range of deserticola, the average 

 shows a general tendency to decrease from south to north (fig 73) 



