76 



Rowland M. Shelley 



Distribution. Theatops posticus consists of allopatric populations 

 in eastern and southwestern North America segregated by around 1200 

 km (750 miles) (Shelley 1990a, Fig. 3). The eastern population extends, 

 north-south, from eastern Connecticut, the Catskill Mountains of New 

 York, southwestern Pennsylvania, and southern Illinois to the south 

 Florida keys and San Patricio County, Texas, and, east-west, from 

 the Atlantic Ocean to the eastern periphery of the Central Plains in 

 Seminole County, Oklahoma, and Limestone County, Texas. It encompasses 

 all of West Virginia, Kentucky, Tennessee, South Carolina, Georgia, 

 Florida, Alabama, Mississippi, Arkansas, and Louisiana. The southwestern 

 population, centered in the Sonoran Desert, occurs from western Chihuahua, 

 Mexico, to the Channel Islands in the Pacific Ocean off the southern 

 California coast, and from the eastern slope of the Coast Range in 



Fig. 11. Distribution of T. posticus in eastern North America. 



