78 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



Measurements {in millimeters) — Concluded 



c3 O 



■a fl 



Lost Mountain, 



Georgia 25.9 10.9 6.8 .... 28. 2 25.9- 



Bainbridge, Georgia. 25.2 10.2 6 .... 29 26.4 



River Junction, Flor- 

 ida 23.8 10.6 6.2 .... 29.2 28 



River Junction, Flor- 

 ida 28.4 11.7 7.3 .... 32.2 31.2 



Tennessee (ex Saus- 



sure) 30 



Lookout Mountain, 



Tennessee 28.3 11 6.8 .... 30.2 28.6 



Lookout Mountain, 



Tennessee 29.5 11.5 6.5 . .'. . 28 25.3 



Opelika, Alabama . . 27.2 12 7 .... 29.5 29.5 



Opelika, Alabama. . 26.5 10.7 6.2 .... 28.4 26.3 



Holly Springs, Miss- 

 issippi 3023 12 7 .... 30.6 23 



Winona, Mississippi. 27 12 7.3 .... 30.4 25.6 



Meridian, Mississippi 26.4 11 6.4 .... 31 30.5 



Geographic Variation.- — It is evident, from the above measure- 

 ments, that as one passes to the south and southwestward 

 over the range of this species, the individuals from the highest 

 elevations remain of approximately similar size to those from 

 the more northern locahties, while in the valleys and on the 

 lower elevations the individuals are progressively larger, the max- 

 imum being reached in northern Florida, central Alabama and 

 the whole of Mississippi. The best index to this increase is 

 furnished by the length of the caudal femur. It is also note- 

 worthy, although not so conclusively demonstrated, that the 

 ratio of the length of the caudal femur to that of the ovipositor 

 changes from but shghtly, to distinctly, in favor of the femur as 

 we proceed southward. In northern Mississippi (Holly Springs 

 and Winona) there appears to be developing an incipient race, 

 with a much shorter and heavier ovipositor. Meridian, Missis- 

 sippi specimens are of the usual type. Males from northern, 



2^ Body abnormally compressed. 



