STENUS. 291 



Black ; puhescence very scanty ; fore parts dull, closely 

 punctured ; alxlonion rather sliiny, moderately closely 

 l»unclurod. Thorax oblong, not much longer than broad, 

 with an indistinct central furrow and indistinctly impressed 

 at sides; elytra scarcely longer than thorax. L. 1| — 2 1. 

 Common. S. foveiventris, Fairm . 



h 2, Third joint of antennae 

 scarcely longer than fourth ; se- 

 cond joint of maxillary paljji 

 yellow at base. 



Eather flat. Black ; legs more or less pitchy ; pul)es- 

 cence extremely short and fine. Fore parts dull, aljdomen 

 somewhat shiny; punctuation close. Head nearly as 

 broad as elytra taken together, forehead scarcely hollowed; 

 thorax as long as broad, strongly rounded at sides, with a 

 feel)le impression on each side ; elytra not much longer 

 tlian thorax. L. 2i 1. Not common. S. opacus, Er. 



S 2, Abdomen diffusely punctured. 



Black, with scanty gray pubescence ; antennae, legs and 

 palpi black, first joint of latter yellow. Head narrower 

 than elytra, vertex even, eyes not very prominent ; thorax 

 elongate, closely punctured, somewhat in wrinkles ; elytra 

 scarcely longer than thorax, not very closely punctured ; 

 abdomen diffusely punctured, middle ridges strongly raised. 

 Allied to S. ciiierascens, but larger and more shiny. L. 2 1. 

 Eare. S. Shepherdi, Crotch. 



JB b. Length 1^ — 1| lines. 

 A 1. Frontal furrows shallow. 

 Elytra rather strongly and deeply punctured. 



a 1, Forehead not very convex. 



A 2, Second joint of hinder tarsi 

 scarcely longer than third. 



Leaden-black, rather sliiny, pubescence tolerably close. 

 Forehead not depressed, with furrows broad and shallow, 

 interstice broad, slightly arched; elytra oid.y slightly longer 

 than thorax ; abdomen diffusely and finely punctured. 

 L. 1\ — 1| 1. Not common. S. cinerascens, Er. 



H 2, Second joint of hinder tarsi 

 sensibly longer than third. 



Leaden-black, rather shiny, pubescence close. Forehead 



u 2 



