Coleopterological Notices, III. 85 



in this respect with the more northern and eastern polished and 

 sparsely punctate forms. 



It is hoped that the following table may aid somewhat in identi- 

 fication, but as there are undoubtedly many species yet to be dis- 

 covered, it will probably prove more or less ambiguous unless used 

 solely as a key to the descriptions : — 



Punctuation of the elytral intervals confused or forming more than a single 



series 2 



Punctuation of the elytral intervals forming a single even series 23 



2 — Entire upper surface polished, the pronotal punctuation sparse ; basal 

 joint of the hind tarsi generally much longer than the remainder ; 

 antennae variable in length and structure, the third joint often sexually 



modified 3 



Upper surface generally more or less dull, the pronotum densely punctured ; 



third joint of the antennae not noticeably modified sexually 8 



3 — Third antenna! joint of the male equal or subequal in length to the 



fourth 4 



Third antennal joint of the male distinctly shorter than the fourth 7 



4 — Elytral striae obsolete toward apex 5 



Elytral striae distinct throughout the length 6 



5 — Elytra with a large humeral red spot ; size very small.... 1 Immeralis 

 Elytra without basal pale area. 



Antennae short, barely two-fifths as long as the body. 



Prothorax strongly rounded at apex 2 niger 



Prothorax much shorter and more transverse ; subtruncate at apex. 



3 infuscatus 

 Antennae long, about one-half as long as the body ; size much larger. 



4 picipennis 

 6 — Prothorax strongly transverse ; eyes small, separated by nearly one-half 



more than their own width in the male 5 puiictlllatlis 



Prothorax longer ; eyes larger, separated by their own width or but slightly 

 more. 

 Pronotum finely or moderately coarsely punctate. 



Form slender, parallel ; antennae short, scarcely more than one-third, as 



long as the body 6 melsheimeri 



Form broad, oval ; antennae fully two-fifths as long as the body. 



7 obesus 



Pronotum coarsely, deeply punctate 8 pilosus 



7 — Antennae long, fully one-half as long as the body ; pronotal punctuation 



coarse. 



Third joint (male) much longer than the second and more than one-half as 



long as the fourth. 



Intermediate joints of the antennae strongly obconical, scarcely twice as 



long as wide ; prothorax long and subequal in width to the base of the 



elytra 9 diflitilis 



