346 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



The three species of Boraria are superficially similar in gonopod 

 structure but differ trenchantly among themselves in other ways and 

 can be identified readily in the female sex and even in late instar 

 nymphs. Since all three are sympatric, probably the external char- 

 acters have been emphasized to minimize the chances of hybridiza- 

 tion. A distinct sequence in level of specialization can be observed: 

 B. stricta departs less from the typical characters of the tribe in 

 general, it has fewest specialized structures of the three, and sexual 

 dimorphism is least pronounced, B. deturkiana is clearly a specialized 

 form in nearly all of its features and, if B. media did not exist, would 

 require a separate generic standing. But B. media forms the con- 

 necting link and is appropriately named even though it was originally 

 proposed in a different genus as the second (hence intermediate) of 

 three new species. 



Interestingly enough, the structiu-al relationships of these three 

 species is paralleled inversely by their distributions. B. stricta, the 

 least specialized, has the greatest range and is relatively abundant. 

 B. media is more restricted and not so easy to find. B. deturkiana is 

 known only from a limited area and is confined to elevations above 

 3000 feet. Most of its characters suggest that B. deturkiana is a 

 localized derivative of B. media. 



What is needed now are data of a comparative nature on the life 

 histories and behavior of these three species. 



Literature Cited 



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