36 - STERNOXI — ELATERIDAE. 



punctured ; interstices on elytra usually rather strongly 

 wrinkled transversely. L. 2| — 3-^? 1. Not uncommon. 



E. nigrinus, Herbst. 



h. Thorax scarcely broader than long ; antennae as long 

 as head and thorax, third joint scarcely longer than 

 second. 



Black, shiny. Thorax somewhat closely and strongly 

 punctured; interstices on elytra diffusely punctured, only 

 slightly wrinkled. L. 4^ 1. Eare. E. acthiops, Lac. 



Megapefithes, 



A. Antennae strongly sawlike, third joint double as long 

 as second. 



Black ; thorax (with reflexed margins) red, rather dif- 

 fusely punctured. L. 4| 1. Not common. 



M. sanguinicollis, Panz, 



H. Antennae feebly sawlike, third joint small. 



ci. Body gradually narrowed from front backward, dull. 



Black ; tibiae pitchy. Thorax closely and shallowly 

 punctured. L. 4 — 5 1. Very rare. M. lugens, Eedt. 



h. Body parallel-sided, moderately shiny. 



Black ; tibiae reddish. Forehead with an indistinct 

 longitudinal prominence ; thorax moderately closely and 

 strongly punctured. L. 3 — 4 1. Eare. M. tibialis, Lac. 



Cvyj)tohy2niu8, 



A. Length 2-| — 2f lines. 



a. First joint of antennae shorter than third joint. 



Black, with slight bronze reflection. Pubescence close, 

 line, gray ; punctuation very close and fine. Thorax as long 

 as broad ; elytra with deep punctured striae ; first joint of 

 antennae broader than long, shorter than third joint ; pros- 

 ternal process covering only base of mouth parts. Scarce. 



G. mariti'inus, Curt. 



&. First joint of antennae longer than third joint. 



Black, with bronze reflection ; base of antennae and legs 

 red. Pubescence golden-yellow. Thorax broader than 

 long, punctuation diffuse, moderately fine but deep ; elytra 



