702 FAMILY XXXVII. ELATEBIDiE. 



c. Under side of thorax with antennal grooves usually sharply limited, 

 and close to the lateral margin. 

 d. Prosternal sutures strongly curved; length 6-9 mm. 



III. Stethon. 



dd. Prosternal sutures straight. 



e. Antenna! grooves continuing directly from the thorax to the 

 head. j 



/. Metasternum with a fine groove, limited by finely elevated 

 lines, prolonged backward from the outer side of the mid- 

 dle coxae; length 6 mm. Eucnemis. 

 ff, Metasternum without groove. 



g. Antennal grooves of thorax wide, usually wider behind : 

 length 3-5 mm. IV. Deltometopus. 



gg. Antennal grooves narrow, not wider behind; length 5.5- 

 8.5 mm. V. Dbom^olus. 



ee. Antennal grooves more or less interrupted by the eyes ; antenna? 

 slender ; fourth joint of tarsi emarginate and slightly lobed 

 beneath ; length 7-17 mm. VI. Fornax. 



cc. Under side of thorax without marginal antennal grooves. 



li. Antennal grooves present on under side of thorax close to suture; 

 side margin of thorax formed by two finely elevated lines, the 

 one starting from the front margin and prolonged backward, the 

 other from the hind angles becoming inferior. 



i. Antennal grooves near the suture very short, merely slightly in- 



dicated in front ; length 3.5-4 mm. - Adelothyeeus. 



ii. Antennal grooves near the suture entire ; length 3-6 mm. 



j. Second joint of antennae alone small. VII. Miceobhagus. 

 jj. Joints two and three of antennae small, moniliform. 



Entomophthalmtjs. 



lih. Under side of thorax without antennal grooves; side margin of 

 thorax single or sometimes nearly obsolete. 

 Jc. Hind coxal plates either parallel or wider on the outer side. 

 h Antennae slender, filiform, the third joint much longer than 

 second ; length 8-9 mm. VIII. Hylochabes. 



II. Antennae biserrate in the female, bipectinate in male; length 

 6.5 mm. Saepedon. 

 klc. Hind coxal plates narrower on the outer side. 

 m. Mandibles stout, rugose. 



n. Last ventral segment prolonged in a point; length 6-9 mm. 



IX. Nematodes. 

 nn. Last, ventral segment obtuse at tip; length 4-5.5 mm. 



X. Hypoccelus. 



mm. Mandibles slender, not rugose ; side margins of thorax distinct, 

 o. Clypeus very deeply sinuate each side, so as to appear tri- 

 lobed ; length S mm. XI. Schizophilus. 



on. Clypeus regularly curved in front ; coxal plates gradually 

 broader on inner side; last three joints of antennae ab- 

 ruptly longer ; length 9.5-11 mm.' XII. Phlegon. 



