120 GEO. H. HORN, M. D. 



Thorax with median black space. 



Elytra shining, pale yellow, with broad black median vitta narrowed or 



interrupted at middle oregoneusis. 



Head broad, front convex. 



Body above unicolored, black. (Exception made of a narrow pale margin at 

 tip of elytra or base of thorax.) 



Antennae strongly serrate, or almost sub-pectinate % mgrellus. 



Antennae. moderately serrate. 



Lateral and apical margins of elytra bordered with a paler color. 



Thorax with pale apical margin, apex of elytra bordered with tes- 

 taceous basalis. 



Thorax entirely black. 



Apical margin bordered with a narrowyellow space, % .tcrminalis. 

 Apical margin livid testaceous, extending obliquely along the 



suture varians. 



Lateral and apical margins not pale. 



Legs all pale testaceous (species small broadly oval) grauularis. 



Legs black, at least the middle and posterior. 



Body black shining, legs and antennas black morula*. 



Body black, elytra sooty, front legs andclypeus pale....pallifrous. 

 Body above bicolored or almost entirely rufous. 

 Head and thorax concolored, pale rufous. 



Elytra entirely black, shining melanopterus. 



Elytra pale rufous with small humeral black spot humeralis. 



Elytra pale rufous with an apical and basal black spot. 



Tibise and tarsi black. Elytra dull parallelus. 



Tibiae and tarsi pale yellowish. Elytra shining I'ettiti. 



Elytra bluish-black, suture and apex rufous rufiventris. 



Head black, thorax either margined, entirely rufous or nearly black. 

 Elytra entirely black. Thorax usually entirely rufous. 



Legs entirely black. Elytra shining Iligripes. 



Anterior and middle tibise pale. Elytra sooty Otiosus. 



Elytra black, margin of suture pale or rufous. 

 Thorax with discal black spot. Elytral limb and suture narrowly 

 bordered with yellow. 



Abdomen black circumscriptum. 



Abdomen rufous rufiveiltris var. 



Thorax in great part black. 

 Abdomen pale yellow ciiictus. 



,,,,,. f difficilis. 



Abdomen black i . . ... 



■ lobulatus. 



Elytra livid testaceous. 



Suture and margin often black scincetus. 



From the above table the only known species omitted is A. (Sca- 



hpterus) rufomarginatus, Motsch. Bull. Mosc. 1859, iv., p. 406; a 



species from California resembling in general aspect Tcmaops abdomi- 



nalis, Lee, and possibly closely allied to A. oregonensis. 



In the " List," p. 53, LeConte notes A. Jiavifrons, Lee. There is no 





