PTEROSTICHIN^: 393 



In Piesmus the tooth is nearly similar in outline, but the surface 

 slopes anteriorly, the posterior limit of the slope marked by a prom- 

 inent line, wholly unobservable in Loxandrus. The male in Lox- 

 andrus has one, the female two, apical setigerous punctures at each 

 side of the last ventral segment. 



