16 COLEOPTERA OF NORTH AMERICA. 



lished by Chaudoir; Schaum placed it in the group Broscidse,* 

 from which, however, it departs both by the concealed epiuiera 

 of the metathorax, and by the epiiuera of the mesothorax reacliiiig 

 the coxae. To us it seems most natural to consider it as the 

 passage from the preceding to the following tribes. Two species 

 occur in California under stones, in mountain regions. 



Tribe X.— SCARITIXI. 



Antennas moderate in length, inserted under a frontal plate 

 with a variable number of glabrous joints. Eyes comparatively 

 small, very finely granulate and distant from the buccal opening 

 (Scarites), or normally convex and granulate, and not distant 

 from the mouth (Clivinse). Head variable in form and with uuv 

 (Scarites), or two (Clivinae) supra-orbital setae. Labrum short, 

 emarginate or sinuate. Mandibles at least moderately promi- 

 nent, without setigerous puncture, simple or dentate. Maxillae 

 with the inner lobe often obtuse at tip, in some genera normally 

 hooked, ciliate or spinulose within, outer lobe biarticulate, the 

 terminal joint usually shorter ; palpi variable in form. Mentum 

 emarginate, often deeply ; the tooth variable in size, epilobes nar- 

 row, but very wide in Schtzogenius. Ijigula either broad and 

 large (Scarites) or small and prolonged (Clivinae), the tip narrow 

 and bisetose, except in Pa^imachus in which it is but little 

 prominent at middle and with the two setae very closely approxi- 

 mated, paraglossae . usually slender and longer than the ligula, 

 spinulose within in the Scarites. Palpi moderate, t.erminal joint 

 variable in form, shorter than the penultimate (Scarites) equal or 

 longer (Clivime), the penultimate bisetose in front (Clivina^), 

 plurisetose (Scaritesj Thorax variable in form, hind angles 

 rarely prominent ; side margin with a setigerous })uncture in the 

 hind angle (Scarites), or with two lateral punctures (Clivinae). 

 Body pedunculate, scutellum not visible between the elytra. 

 Elytra rarely slightly margined at base, sides narrowly inflexed, 

 margin entire, except in Arditifomis where there is a distinct 

 interruption posteriorly and an internal plica. Prosternuni not 

 prolonged behind the coxte, the cavities closed behind. Meso- 

 sternum vertical, not carinate in front. Metasternal epimera not 

 visible in PammavJius, more or less distinct in all the other 



* But has corrected tliis error on a subsequent page ; vide Ins. DeutscliL, 

 I, 773. 



