224 GEO. H. HORN, M. D. 



The tbllowino' table will assist in the identification of tlie species but 

 should not (and the same is true of any synoptic table) be depended 

 upon to the exclusion of the more extended description : 



Upper surface black or piceous 2. 



Particolored species, thorax and legs always yellow 11. 



2. — Elytra very finely densely punctured and opaque ?,. 



Elytra more or less shining, punctures distinct 5. 



?,. — Head very densely punctured, opaque Cinera^cens. 



Head more or less shining, punctures coarse, less dense 4. 



4. — Thorax oval, very little longer than wide, elytra longer than the thorax. 



nnniis. 

 Thorax oval, distinctly narrower l)ehind very little longer than wide, elytra 



not longer than the thorax iiilltilis. 



Thorax oblong, much longer than wide, elyti-a depressed jiarnllel, hmger than 



the thorax fraterculiis. 



5. — Thorax oblong, narrower behind, the punctures numerous, without serial ar- 

 rangement 6. 



Thorax more or less oval, not narrowed behind, the punctures not numerous, 



arranged in three irregular series on each side 8. 



6. — Abdomen above and beneath opaque, punctuation fine, the surface alutaoeous, 



thoracic punctures fine and dense senilis. 



Abdomen above and beneatli shining, punctures sparse: thoracic punctures 



coarse the median space not sharply defined 7. 



7. — Elytral punctures close and inconspicuous; legs and antennae piceous. 



Elytra with narrow pale tips ; antennae slender infimiis. 



Elytra uniform in color; antennse stout seilliptllicfatiis. 



Elytral punctures conspicuous, not close. 



Antennae piceous, femora yellow, tibiae and tarsi piceous ocreatus. 



Antennae brown, testaceous at base, legs yellow. 



Elytra distinctly longer than the thorax, apex not sharply paler. 



sobriiius. 

 Elytra not longer than the thorax, punctuation less conspicuous and 



sparser, apex with well defined pale apex agiiatlis. 



8. — Elytra finely and inconspicuously punctureil 9. 



Elytra coarsely punctured (quite small species) 10. 



9. — Piceous, legs paler, head sparsely punctured. 



Elytra very densely punctured, sub-opaque patella. 



Elytra shining, less densely punctured lo.^atlis. 



Black, legs piceous; head numerously punctured behind the eyes. 



piincticeps. 



Iq. — Antennae and legs piceous pusio. 



Antennae and legs pale parcus. 



11. — Head and thorax yellow gratlis. 



Head black, thorax yellow 12. 



12. — Abdomen above and beneath at least moderately densely punctured, not 

 shining. 

 Elytra less closely and more coarsely punctate. 



Apex of elytra with very narrow pale border psederoides. 



