46 OTIOEHYIS^CHID^. 



[Horn. 



Tnis species was sent by Motschulsky as Sitones seniculus, Maun., to Dr. 

 LeConte ; another type fi'om the same source sent to Allarcl proved to be- 

 long to another entirely diiferent species, of which mention will be made 

 by Dr. LeConte in the proper place. 



The original description by Mannerheim is here appended, so that a com- 

 parison of descriptions may be readily made. 



"Oblongus, subcylindricus, niger ci)iereo-tome7itosus et setosus, fronte 

 canaliculata, rostro excavato, thoraci profunde rugose punctata, lateribus 

 vix rotundato, elytris profunde punctato-striatis, antennarum basi, tibiisque 

 ferrugineis. Long. 1| lin ; latit. ^ lin. 



DIAMIMUS n. g. 



Rostrum longer and narrower than the head, slightly broader in front, 

 cylindrical at base, separated from the head by a transverse impression, tip 

 feebly emarginate and with very small smooth space. Scrobes deep, well 

 defined arcuate, directed beneath at a distance from the eyes. Antennse 

 moderate, scape feebly clavate, attaining the middle of the eye ; funicle 7- 

 jointed, 1-3 larger, 3-7 obconical, gradually decreasing in length, the last 

 distant from the club which is elongate oval, acute. Eyes broadly oval. 

 Thorax cylindrical, sides feebly arcuate, lobes very short, fimbriate. 

 Scutellum distinct. Elytral oblong oval, humeri obliterated. Metasternum 

 short, side pieces indistinct suture obliterated. Intercoxal process mode- 

 rate, truncate in front. Second segment longer than the two following, 

 separated from the first by an arcuate suture. Anterior and middle tibiae 

 mucronate at tip, not denticulate within, hind tibiae not mucronate, their 

 corbels cavernous. Tarsi normal. Body oblong densely scaly, sparsely 

 pilose. 



D. subsericeus, n. sp. 



Form oblong, surface moderately densely covered with cinereous scales 

 slightly cupreous and with micaceous lustre and Avith erect hairs sparsely 

 placed. Head and rostrum not longer than the thorax, moderately densely 

 scaly, sparsely pilose. Thorax cylindrical, slightly wider than long, apex 

 and base truncate, sides regularly and moderately arcuate, disc moderately 

 convex, sparsely punctured, moderately densely scaly and sparsely pilose. 

 Elj''tra oblong oval, sides feebly arcuate, humeri obsolete, surface mode- 

 rately convex and with rows of moderate, not closely placed punctures, 

 intervals flat, moderately densely scaly, each with a row of moderately 

 long erect hairs. Body beheath less densely scaly and with very few 

 hairs. Legs sparsely scaly, hairs longer. Surface color less the vestiture 

 piceous. Length .18-. 22 inch ; 4.5-5.5 mm. 



Occurs in New Mexico and Colorado. 



PERITAXIA n. g. 



This genus differs from the preceding by the following characters : 

 Sci'obes more evanescent posteriorly, less arcuate and directed more in- 

 feriorly. Corbels of hind tibiae open. Humeri rectangular. 



