542 Coleopterological Notices, VII. 



tudinally impressed, the eyes well developed, the basal joint of the 

 antennae greatly, and the second also notably, elongate, and the 

 labial palpi stout and subinflated ; it is one of the most isolated 

 types of the family and should undoubtedly form a distinct tribe. 

 The genus Hecotus of Sharp (Biologia Oentrali-Americana, II, 

 pt. 1, 1887, p. 70), is sufficiently abnormal not only to render its 

 affinity with Clidicus very doubtful, but even to suggest some 

 question of its being a member of the Scydmaenidse. Nothing 

 further will be necessary than to invite attention to the abdomen, 

 which is said to have five segments, and to the scutellum, which 

 is shown distinctly in the drawing through unmentioned in the 

 description. There is generally no distinct trace of a scutellum 

 between the elytra in the Clidicinse, and no scydmsenid is known 

 to me having less than six perfectly formed ventral segments. 



Cltdicini. 

 The genus Clidicus and related forms are much less abundant 

 in subarctic faunal regions than the Leptomastacini, but Papusus 

 will probably contain a limited number of species distributed 

 through the arid regions of Mexico. It is not possible to present 

 a table of genera on account of the paucity of material. 



PAPUSUS n. gen. 

 The body in this genus is elongate-oval in form and rather con- 

 vex, the head large, borne on a deeply and simply constricted 

 neck, which is rather broad, the eyes well developed, on the sides 

 at or just before the middle, feebly convex, not prominent and 

 consisting of very coarse and convex lenses, the antennae inserted 

 in small and remotely separated foveae at the summit of the long 

 and feebly declivous front, just before the middle of the length ; 

 they are strongly geniculate, with the basal joint elongate, not 

 quite equal to the next three in length, and the remainder are 

 feebly and gradually incrassate to the tip, with but the feeblest 

 trace of a 5-jointed club. The clypeus is short, transverse, con- 

 tinuing the feeble slope of the front and separated therefrom by a 

 straight transverse suture, the apex transversely and very broadly 

 truncate, the labrum much narrower, short, transverse, polished, 

 corneous, emarginate at apex and bearing only some six long setae 

 in a transverse and arcuate subapical series. Mandibles moder- 

 ately large, very stout, straight toward base, gradually bent 



