LECONTE ON EOCKY MOUNTAIN COLEOPTEEA. 453 



10. Oeobanus simulator, n. g. et sp. 



Elongate, graceful in form, resembling a Lesteva, brown or piceous 

 black, shining, sparsely and finely pubescent, finely and densely punc- 

 tured. Head convex, with two long impressions ; ocelli distant, situated 

 farther back than the hind margin of the eyes. Sides rounded behind 

 the eyes ; neck not very slender. Antennse slender, one-half as long 

 as the body, very little thickened towards the extremity, iJd joint a 

 little shorter than the others. Prothorax scarcely wider than the head 

 and eyes ; ovate narrowed behind ; sides oblique and strongly margined 

 for the posterior two-thirds of their length, impressed with a large lat- 

 eral fovea, anterior to which they are rounded and finely margined ; disc 

 convex, obsoletely channelled, feebly impressed near the base. Elytra 

 more than twice as long as the prothorax, narrow at base, wider behind, 

 separately much rounded at tip. Abdomen finely punctulate. Length 

 3mm (0.12 inch). 



Leavenworth Valley (9,000 to 10,000 feet) ; also found in Vancouver 

 Island and at Gilroy and Holcomb Valley, California. The last joint of 

 the maxillary palpi ia much smaller than in Microedus Aiistinianus, and 

 acicular. This, taken with the peculiar form of the prothorax and 

 deep lateral impression, indicates the propriety of placing it as a dis- 

 tinct genus. 



COCCINELLIDiE. 



11. Brachiacantha uesina. 



Beaver Creek, Colorado, (6,000 feet). Two specimens were collected, 

 in which the basal spot of the elytra is represented by a transverse 

 band ; in one specimen the discoidal spot is also wanting. 



12. SCYMNUS NiaRIPENNIS, n. Sp. 



Oval convex, ferruginous, darker beneath. Head and prothorax very 

 finely sparsely punctulate, the latter with a transverse piceous cloud at 

 the base. Elytra finely, not densely, punctured (pubescence rubbed off), 

 entirely black. Postcoxal arcs of 1st ventral segment entire, extend- 

 ing to the hind margin of the segment. Beneath densely punctured. 

 Length 2.5™- (0.10 inch). 



Florissant, Colo., (8,000 feet). 



SCAEAB^ID^E. 



13. Aphodius aleutus, Esch. 



Leavenw'orth Valley, above Georgetown, Colo., (10,000 to 11,000 

 feet). One specimen, which agrees with the detailed description of 

 Baron von Harold (Berl. Ent. Zeitschr. 1863, 372) and with others from 

 Vancouver Island. 



14. Aphodius bidens, n. sj). 



Of the same form as A. aleutus, shining brown, cylindrical, convex j 

 elytra ferrugineous. Head slightly rugose, tuberculate, hemihexagonal, 



