44, STERNOXI — ELATERIDAE. 



Oblong. Head and thorax dark brown, latter with 

 margins lighter. Pubescence gray. Thorax nearly as 

 long as broad, closely punctured, sides slightly rounded, 

 posterior angles projecting somewhat outward. Common. 



A. lineatus, Lin. 



II, Posterior angles of thorax not or only indistinctly 

 ridged. 



Short, strongly convex. Dark brown ; elytra lighter ; 

 pubescence gray. Thorax dull, much broader than long, 

 very closely and rather strongly punctured with a more or 

 less distinct central furrow toward base, posterior angles 

 projecting outward. L. 4 — 4| 1. Common. 



A. ohscurus, Lin. 



b. Posterior coxae dilated on inner part more or less 

 suddenly, their inner third part twice as broad as their 

 outer third part. 



J. Posterior angles of thorax finely ridged. 



1» Thorax strongly punctured, unicolorous black. 



Oblong, parallel-sided, not very convex, rather dull. 

 Black, with gray pubescence ; antennae, palpi and legs 

 rust-red, femora brownish. Mandibles compressed ; thorax 

 as broad as long, closely and strongly punctured, sides 

 straight, parallel ; elytra rather flat on disc, with punctured 

 striae, interstices granulate. L. 4 — 4f 1. Pare. 



A. sordidus, 111. 



2. Thorax finely punctured, with posterior angles 

 rust-red. 



Elongate, not very convex. Dark brown or black ; pos- 

 terior angles of thorax and the elytra brownish-yellow, 

 latter blackish at base, suture and side margin ; pubescence 

 scanty. Antennae rather strongly sawlike ; thorax longer 

 than broad, diffusely and rather strongly punctured, side 

 marginal line bent on to under-side in front and interrupted 

 in middle ; elytra considerably broader than thorax. L. 2f 

 — 3 1. Eather common. A. sohrinus, Kies. 



II, Posterior angles of thorax not ridged. 



Elongate, convex. Dark brown or black ; elytra either 

 dark brown or brownish-yellow ; pubescence scanty. An- 

 tennae scarcely sawlike ; thorax longer than broad, diffusely 

 and rather strongly punctured, side marginal line inter- 



