-30- 



19. 10th tergite hook large, 

 extends beyond rod B. 



Rods C & D slender. fig. 125 riesi Ross 1944 



10th tergite hook small, 

 rod B extends furthest pos- 

 teriorly. Rods C & D thick 

 at base, tapering to 

 apex. fig* 126 confusa Morton 1905 



20. Clasper: no projection or 

 spine on ventromesal sur- 

 face. ~38 



- Clasper: projection or 

 spine present on ventro- 

 mesal surface. ~21 



21. Clasper: apex attenuated 

 and bearing a very long 

 stout spine which arises on 

 the mesal surface. A row of 



short stout spines on dor- fig. 127 ildria Denning & 

 sal margin of clasper. Blickle 1972 



- Clasper without long, stout 

 spine arising from mesal 



surface. ~22 



22. Claspers tapering to apex 

 and bearing a small spine 

 or lobe on ventral margin 



beyond its mid point. ~23 



Claspers not as above. ~30 



23. Claspers without dark teeth 

 on ventral lobe, with 9 or 

 10 peg-like spines on dor- 

 sal mesal margin above fig. 128 rothi Denning & 

 lobe. Blickle 1972 



- Claspers with teeth on ven- 

 tral lobe, no peg-like 

 spines on dorsal mesal mar- 

 gin. Apical rod of 10th 

 tergite with circular mem- 

 branous area. ~24 



