34 STERNOXI — ELATERIDAE. 



Head bent downward ; under-side of thorax witliont 

 antennal grooves ; fonrtli tarsal joint dilated or simple, 

 claws sawlike. Adrastus, Esch. 



II» Head prominent ; eyes strongly convex. 



Anterior margin of forehead sharp, raised; seams beneath 

 thorax simple ; intermediate coxae much approximated. 



Campylus, Fisch. 



JLacon. 



Pitcli-black, entirely covered with thick gray and brown 

 marbled pubescence. Elytra with feel)le punctured striae, 

 interstices finely punctured. L. 5 — 7 1. Common. 



L. murinus, Lin. 



Elater. 



A, Elytra bright red, either unicolorous, with a common 

 black spot, or with apex black. 



a. Thorax short. 



I, Central furrow on thorax distinct throughout. 



Black, elytra scarlet. Hairs black, on under-side very 

 fine. Thorax closely and strongly punctured. L. 5 — 6 1. 

 Eare. E. sangiiineus, Lin. 



II. Central furrow on thorax distinct at base only. 



1. Apex of elytra red. 



A A, Upper-side covered with pale hairs. 



Black, elytra scarlet. Hairs on under-side close-lying 

 and silky. Thorax closely and strongly punctured. Body 

 rather broader than in E. sangvinous, thorax somewhat 

 more convex, striae on elytra not quite reaching base. 

 L. 5 — 6 1. Eatlier common. E. lythropterus, Germ. 



jB _B. Upper-side covered with a mixture of 

 light and dark hairs. 



Black ; elytra scarlet, generally with a common, black, 

 long oval spot. Hairs on head and thorax black and gray 

 mixed, on elytra gray or brownish. Thorax closely and 

 strongly punctured, a little more scantily on hinder part of 

 disc, without central furrow ; elytra with strong punctured 

 striae. L. 4 — 5| 1. Not common. 



E. sanguinolentus, Schr. 



2, Apex of elytra black. 



