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Figure 1. — Extreme western North Carolina and adjacent parts of Tennessee, Georgia, 

 and South Carolina, showing the distribution of body proportion in Cherokia in the 

 southern Blue Ridge. The isophenes enclosing the 26-28 percent interval extend 

 south, west, and north to encompass the remaining majority of the range of the genus 

 (see also fig. 7). 



anterior rim of the paranota on all segments. The other form (fig. 

 3,6) differs in that the scapulorae turn rather abruptly mesiad at the 

 paranotal shoulder and are submarginal in position, with a consider- 

 able portion of the cephalic face of the paranota visible below and hi 

 front of them as seen in dorsal aspect. The map (fig. 2) shows the 

 distribution of these two structural variants, which are apparently 

 largely complementary. 



In the occurrence of two discrete paranotal types we find a situation 

 not hitherto observed in the xystodesmid genera studied in detail, 

 although a similar relationship may occur in the related genera Rhyso- 

 desmus and Boraria, both of which are known to be highly variable in 

 general body form. 





