-36- 

 Oxyethira Eaton 1873 



1. 8th tergite produced into a 

 process on the apico- 



lateral margin. -2 



8th tergite not produced in 



a process on apico-lateral 



margin. -14 



2. 8th tergite with apico-la- 

 teral margins produced into 

 long, serrate processes. 

 Claspers elongate; emargi- 



nate apico-dorsally. fig* 154 serrata Ross 1938 



- 8th tergite without serrate 

 processes on apico-lateral 



margins. -3 



3. 8th tergite produced into 

 long sclerotized rods 

 apico-laterally; rods con- 

 verging, approximate at 

 apex. Aedeagus: basal part 

 wide, narrowing to a single 

 rod like apical part , 



curved at extreme apex. fig. 155 aculea Ross 1941 



- 8th tergite rods not ap- 

 proximate at apex. -4 



4. 8th tergite rods bifurcate 

 at apex; each fork tipped 

 with spines. Aedeagus; cen- 

 tral part stout for its en- 

 tire length, with a hook- 

 like process at the apex; 

 spiral process long, en- 

 circles central part with a 



3/4 turn. fig. 156 araya Ross 1941 



- 8th tergite rods not bifur- 

 cate at apex. -5 



