410 CLAVICORNIA — HISTERIDAE. 



The variety >S'. subrotandata, Leach, is larger and has the 

 central raised line longest. 



Sphaerites. 



Black, shiny ; upper-side with greenish reflection. 

 Thorax with a fine engraved line at sides ; elytra truncate, 

 with punctured striae. L. 2i 1. Scarce. S. glabratus, Fab. 



HISTBltlDAE, 



A. Elytra not completely covering abdomen. 



a. Presternum produced in front into a rounded lobe, 

 covering under-side of head and separated by a fine 

 transverse line. 



I, Clypeus separated from forehead by an impressed 

 line. 



Antennae inserted under margin of forehead, funiculus 

 more or less thickened at apical end, cavity for reception 

 of club of antennae at anterior margin of prosternum ; 

 anterior til)iae as broad at apex as in middle, toothed on 

 outer-side, tarsal cavity well defined on inner-side ; hinder 

 pairs of tibiae with a double row of spines ; inner dorsal 

 striae on elytra and sutural stria sometimes absent, gene- 

 rally abl)reviated in front, reflexed margin with a depression 

 under shoulder (subhumeral depression). Hister, Lin. 



II, Clypeus not distinctly separate from forehead. 



1. Anterior tibiae as broad at apex as in middle. 



A A, Elytra with regular strong striae, abbre- 

 viated in front, when at all. 



Antennae inserted under margin of forehead, funiculus 

 not thickened at apical end, its first joint not much longer 

 than rest ; cavities for reception of club of antennae in 

 middle of sides of prosternum, not deep ; anterior tibiae 

 curved, tootlied, ending in a strong hook curved outward, 

 tarsal cavity badly defined ; prosternum bordered by a 

 strong curved stria, anterior process prominent ; meso- 

 sternum very slightly sinuate in front, bordered by an 

 uninterrupted stria ; reflexed margin of elytra without 

 subhumeral depression. Oarcioiops, Mars. 



