160 PROCEEDINGS OF THE ACADEMY OF [Fcb., 



the middle one much longest; basal spines 2-2, moderate, subequal, or 

 the inner ones a httle longer. 



Length of body 10.5-11 mm. ; width of 8th dorsal plate 1.4-1.5 mm. ; 

 length of antennas and of anal legs each 4 mm. 



Habitat. — Pacific Grove, Cal. 



Etymology. — Latin clavis, a club, and gercns, participle of gerere, to 

 bear; so named because the swelling on the dorsal surface of the tibia 

 in the d^ anal legs suggests a club with the large end placed proxi- 

 mally. 



