1900.] Catalogue of tlie ColeojJtera of South Africa. 50T 



in the centre ; scutellum smooth, rounded behind ; elytra covered 

 with wide umbilicate punctures disposed in longitudinal series, which 

 become obliterated towards the apex, the sutural stria is alone notice- 

 able, and the interval enclosed by it is raised ; pygidium invisible ;, 

 first joint of the posterior tarsi as long as the three following put 

 together, but shorter than the apical spurs ; anterior tibiae tri-dentate 

 and not crenulate above the digits. 



Length 6-|- mm. 



Hah. South-Western Africa (? Sissanto)." 



After describing a second species of this genus from Madagascar^ 

 Lansberge adds that — " The depressed shape of these insects, as well 

 as the strength of their buccal organs, denote that they probably 

 inhabit rotten trunks of trees, and are found under the bark in the 

 manner of the Dynastini, from which the Orjjhnini have wrongly 

 been far separated." 



Sub-Family DYNASTINI. 



Ligula horny and fused with the mentum, but sloping backwards ; 

 maxillary palpi inserted either on the sides of the anterior face or in 

 the inner face of the mentum ; maxillae moderately robust, upper 

 lobe horny, hollowed inwardly, straight or curved and pluri-dentate 

 inwardly, or sometimes ovate or transverse and not dentate ; man- 

 dibles strong, projecting always beyond the clypeus which is 

 obliquely attenuate laterally with the apical part bi-dentate or re- 

 flexed in the middle ; gense small, sometimes reduced to a mere 

 canthus ; antennae len- jointed in all the South African species, club 

 tri-jointed ; anterior coxae set deeply in the cotyloid cavities, the 

 four posterior ones contiguous ; elytra covering the basal part 

 of the pygidium ; claws not toothed beneath or conspicuously cleft, 

 but the anterior tarsi of the male are often thickened and the inner 

 claw is very much developed and more or less contorted ; last three 

 pairs of abdominal spiracles strongly diverging, and placed on the 

 ventral segments. 



This sub-family is distinguished from the sub-family ButelincE, with 

 which it has in common three strongly diverging abdominal spiracles, 

 by the apparent absence of the labrum which is hidden under the 

 clypeus but can still be detected in some species, and by the claws 

 of the tarsi, which are equal, although the inner one is often thickened 

 in the male. 



The clypeus is always strongly attenuate obliquely on the sides 

 with the apex truncate and bi-dentate, or when not bi-dentate it is 



