1907.] Catalogue of the Colcoiptera of South Africa. 309 



the head can be retracted into a prosternal cavity ; the elytra are 

 short, quite plane, truncate at apex, leaving the greatest part of the 

 propygidium, which is very large, uncovered ; the hind legs especially 

 are very long. 



This Tribe is divided into two sections. 



A 2 . Elytra not truncate behind ; pygidium not vertical ; ter- 

 minal end of hind tibiae with three digit-like processes. 



Head non-retractile ; coxae not broadly separated ; pygidium 



slanting, very convex ; white markings squamose . . . . Calometopus. 



A 1 . Elytra truncate behind ; pygidium vertical ; terminal part 

 of hind tibiae muticous. 



Head retractile ; coxae very broadly separated ; elytra much 

 broader than the prothorax ; last abdominal spiracle 

 spinose ; body covered with scales and fascicles of squamose 

 hairs; anterior tibiae 5- dentate in the s , 3-dentate in the ? Comytlwvalgus. 



Head retractile ; coxae not broadly separated ; elytra not 

 broader than the prothorax ; last abdominal spiracle spinose ; 

 body covered with minute, scale-like hairs ; anterior tibiae 

 5-dentate in the c? , 3-dentate in the ? . . Stenovalgus. 



Gen. CALOMETOPUS, Blanch., 

 Catal. Coll. Mus., Par. Ins., i., p. 45. 



Mentum parallel laterally, fused with the ligula, deeply and quad- 

 rately incised at tip, the excised part being nearly one-quarter of the 

 whole length, the two lobate parts are still broad and rounded at 

 tip, the labial palpi are inserted on the outer face ; maxillae long, 

 hairy inwardly, upper lobe slender, horizontal bearing a thick pencil 

 of long hairs ; clypeus longer than the head, as deeply incised at 

 apex as the mentum, but the incision is more triangular ; antennal 

 club slender, longer than the pedicel in the male (the only sex 

 known to me) ; eyes very large ; prothorax as broad as long, 

 sub-hexagonal but with the hind angles not quite rounded; elytra 

 plane, elongate conspicuously narrowed behind, leaving the sides of 

 the dorsal part of the four ultimate abdominal segments uncovered ; 

 pygidium triangular, sub-vertical ; abdomen and pectus compressed 

 laterally ; no mesosternal process ; legs very slender, long, especially 

 the tarsi which are longer than the tibiae the fore ones of which are 

 unidentate, the terminal part of the hind tibiae end in three long 

 digit-like processes, and the two spurs are very long and extremely 

 slender. 



Differs from the other genera included in this Tribe in having 

 the scutellum sharply acuminate ; the genus has a representative in 

 Senegambia, and another in Central Africa. 



