THE DEATH-WATCH AND DRUG STORE BEETLES. bit 



a-. Two oiilcr joints of antemi:e. normally separated ; 1'ront co\;o con- 

 tiguous; hind coxal plates narrow and parallel; mesosternum 

 strongly elevated into a central keel which is horizontal and at- 

 tains the level of the metasteruuin. THECA. 

 a a. Front coxa- not expanded into apical plates, entirely shut in in repose; 



trocha nter joined to the apex of the coxa. 



<1. Front coxa:> contiguous or nearly so; head impressed or excavated be- 

 neath for the antenna?. 



e. Punctures of elytra confused, not in rows ; nietasternuni not lobed 



in front; epipleurie without small pits for the reception of hind 



knees ; antennae 10-jointed. XIV. CATORAMA. 



(.'<.'. Punctures of elytra in rows ; nietasternuni apparently broadly lobed 



in front, on account of deep and narrow excavations for middle 



tarsi; epipleurre with small pits for the hind knees; antennae 9- 



or il-jointed ; pubescence more or less bristly. XV. PROTHECA. 



</(/. Front cox;e widely separated, antenna? received between them. 



/. Prosternnm produced behind into two long, slender, horn-like proc- 

 esses; antenna. 1 10-jointed; form oval, moderately elongate. 



XVI. DORCATOMA. 



//. Prosternum truncate and einarginate behind; autennre S-, 9- or 10- 

 jointed. 



g. Eyes minutely emarginate; elytra without stria? on the disk; 

 form broadly oval. XVII. EUTYLISTUS. 



[til. Eyes deeply and acutely incised, the notch extending to or be- 

 yond the middle; form nearly globose. XVIII. C.ENOCARA. 



XII. PETALIUM Lee. 1861, (Gr., "a leaf.") 



Small, parallel more or less elongate, rather strongly convex 

 species, having the antenna? 11-jointed, about one-third the length 

 of body, joints 9 to 11 together as long or slightly longer than all 

 preceding ; thorax as wide as elytra and with a short curved, deeply 

 impressed line on sides behind the front angles; strongly excavated 

 beneath for the reception of the head : prosternum short, front 

 coxa 3 widely separated; second ventral segment as long as the three 

 following united. 



KEY TO INDIANA SPECIES OF PETALIUM. 



(i. Punctures of elytral rows strong, close-set and distinct quite to apex, 

 the two lateral rows not much deeper than those on disk. 



1665. SERIATUM. 



da. Punctures of elytral strife finer, less close-set and becoming nearly obso- 

 lete on apical third, the two lateral rows conspicuously deeper. 



1666. BISTRIATUM. 



1665 (- -). PETALIUM SERIATUM Fall, Trans. Amer. Ent. Soc.. XXXI. 



1905, 215. 



Moderately elongate. Brown, distinctly though sparsely pubescent. Head 

 and thorax densely punctate throughout; the latter with disk a little promi- 

 nent, with well-defined oblique impressions each side, its front margin 



