Goleopterologicol Notices, VI. 657 



Group I. 



Pronotum not tumid near the base. 



Elytra dark, with a pale transverse fascia behind the base; antennae stout and 



short, the tenth joint not at all longer than wide 1. pinalicus 



Elytra unicolorous, or with the entire. basal region paler; antennai long, fili- 

 form, frequently distinctly and very gradually incrassate. 



Elytra distinctly transversely impressed near the base 2 



Elytra not impressed near the base, or very indistinctly so, smaller and more 



delicate species, the eyes moderate or small in size 6 



2 — Anterior lobe of the prothorax almost evenly rounded at the sides, widest 



at about the middle ^ 3 



Anterior lobe unevenly rounded, more strongly so and widest near the base, 

 the constriction more abrupt; posterior lobe gradually and moderately 

 exf)anded to the base; head strongly, asperately punctate and compara- 

 tively small . California 5 



3 — Body and legs testaceous, the abdomen and posterior parts of the elytra 



generally black or piceous 4 



Body and legs black throughout 2. obscurilS 



4 — Head asperately and more closely punctate. 



Anterior lobe of the prothorax subglobular; antennai very slender. 



3. Tigilaiis 

 Anterior lobe distinctly transverse, the antenna; a little shorter and thicker, 



with the joints distinctly less elongate 4. cursor 



Head minutely, remotely and not asperately punctate. 



Elytra slightly or not at all narrowed at base; posterior lobe of the pro- 

 thorax giadually expanded to the basal margin. 

 Antenna; slender, the joints greatly elongate and subcylindrical. 



Elytra gi-adually narrowed behind the middle 5. alacer 



Elytra parallel, more abruptly and broadly rounded at apex. 



6. iiubilatiis 

 Antennse shorter and stout, strongly incrassate, the joints obconical. 



7. lividiis 

 Elytra strongly narroA\ed at base, the posterior lobe of the prothorax cylin- 

 drical with the sides parallel ; antenna; rather stout and strongly incras- 



ate, {elegans \\ Laf.) 8. sttirnii 



5 — Body completely black, the legs sometimes feebly picescent; antenna; 



moderately slender 9. iii ticlliliis 



Body rufo-testaceous, the abdomen and posterior parts of the elytra black. 

 Antennai joints moderately elongate, obconical, much thicker toward apex. 



10. asperiiliis 

 Antennai joints greatly elongate, subcylindrical, only slightly thicker to- 

 ward apex 11. canouicus 



6 — Elytra pale at base 7 



Elytra unicolorous 8 



T — Elytra very fee])ly impressed, slightly dilated behind the middle. 



Eyes moderate, prominent; l)ody Idack, the elytra pale only very near the 

 base; antenna; long 12. oi'iiatellus 



