THK CLICK BT5ETLES. 723 



with usually a disliiR-t iiiodian iinprossion oxlondiiij,' rioni liasc to apex, 

 deeper behind; surface rather coarsely not closely punctate. Elytra widest 

 one-third from base, thence gradually narrowing to apex; disk striate, stri:e 

 finely but indistinctly punctured; intervals flat, rather sparsely and lincly 

 punctate. Length 5.2-G.5 mm. 



A species of northern range taken in Lake, Laportc and Starke 

 eonnties. April Ifi-Jnne 4. Occurs especially beneath rubbish 

 and bark of trees along the dune region boi-dei'iiig Tiake ^Michigan. 



XX. ITYPNOinrs Steph. 1830. (Gr., "sleep -i form.") 

 Small species readily known by the broad prosternum, with the 

 sutures single and convex on the outer side; the simple tarsal claws 

 and stiff hairs of the tarsal joints. The epimera of the mesothorax 

 do not reach the middle coxa- and the latter are therefore closed on 

 the outer side only by the meso- and metastema. About 20 of the 

 species formerly listed under Cryptohypnvs belong here. Of these 

 eiglil ]iav(^ iM'on taken in the State, while another may occur. 



KEY TO INDIANA SPECIKS OF HYPNOIOUS. 



a. Elytra w^ith all the striiG entire. 



1). Form depressed, the dorsum quite flat; opaque, densely punctulate 

 and pubescent; color uniform piceous. 1361. striatulus. 



?>Zj. Form convex. 



c. Thorax coarsely granulate, often in part or wholly finely, longi- 

 tudinally rugose or strigose. 

 (J. Apical margin of thorax truncate at middle. 



e. Base of thorax strigose like apex; a distinct, smooth elevated 

 median line ; larger, 3 or more mm. 

 /. Elytra yellow with two sinuous blackish crossbars; apical 

 third more or less attenuate ; legs wholly pale. 



1362. CHOKis. 

 ff. Elytra piceous, each with two yellow spots; apical third 

 scarcely attenuate; femora fuscous or piceous. 



1363. ExiGUUS. 



ee. Base of thorax smoother than apex; median line indistinct; 



size smaller, not over 2.5 mm. 1364. melshexmeri. 



dd. Apical margin of thorax curved at middle, slightly prolonged 



over the head. cucultatus. 



cc. Surface of thorax e^iually punctate, not finely strigose. 



ff. Elytra each with two yellow spaces, humeral and subapical; ely- 

 tra! humeri obtuse, strise scarcely more punctate than the in- 

 tervals. 1365. iESTivus. 

 gg. Each elytron with a humeral spot only; humeri rounded, stria? 

 more eoar.sely punctate than the intervals. 1366. perplexus. 

 (Id. Elytra with the stria^ wholly oliliterated. 



h. Surface subopaque. distinctly punctate, especially on the thorax: 

 color variable from dull yellow to piceous. 1367. pectoraijs. 



