-27- 



6. 10th tergite; process C 

 slender, extends to apex 

 of D; D short, stout; E 

 with a row of small den- 

 ticles on outer apical 

 surface; F without a shoul- 

 der beyond spiral; 2 



heavily pigmented spines fig. 112 denningi Blickle & 

 at base of tergite. Morse 1957 



- 10th tergite: C not exten- 

 ding to tip of D; E with- 

 out denticles at apex. -7 



7. 10th tergite: C not angled 

 at base; apex of D slender; 

 apex of F narrowed beyond 



shoulder near spiral. fig. 113 shawnee Ross 1938 



- 10th tergite: process C 

 angled at base; apex of D 



stout. -8 



8. 10th tergite: A very broad; 

 apex of D reaches to spi- 

 ral; F with a deeply ex- 

 cised shoulder beyond spi- 

 ral, fig. 114 contorta Ross 1938 



- 10th tergite: A narrow; 

 apex of D removed from 

 spiral by at least the 

 width of the spiral; shoul- 

 der of F not deeply ex- 

 cised, fig. 115 anlsca Ross 1941 



9. 10th tergite: a long con- 

 spicuous spine curving 

 mesad at the middle of the 

 tergite; basad a small 

 spine directed in the oppo- 

 site direction. -10 



- 10th tergite: no long con- 

 spicuous spine curving 

 mesad and no small spine 

 curving laterad in oppo- 

 site direction. -11 



