1896.] of the Coleoptera of South Africa. 223 



Sijndetus belongs as much to the group Dromiidce as to the Cymin- 

 diclcB, and is a good form of transition between the two. 



Group DKOMIID^. 

 Synopsis of Genera. 



Fourth joint of tarsi bilobate. 



Mentum with a median tooth. 



Tarsi pectinate. 



Paraglossse a little longer than the ligula ; head not 

 narrowed behind Cylindrocranms. 



Head narrowed behind Demetrias. 



Paraglossse much longer than the ligula Peliocypas. 



Fourth joint of tarsi not lobate. 



Mentum with a median tooth. 



Tarsi pectinate. 



Ligula longer than the paragiossae Xenitenus. 



Ligula shorter than the paraglossse Co2)to2)tera. 



Ligula and paragiossee of equal length Metabletiis. 



Mentum without a median tooth. 



Tarsi pectinate. 



Ligula and paraglossse fused, the latter surrounding the 

 ligula in front Dromizis. 



Ligula and paraglossse of equal length, the latter straight 

 outwardly Klcpterus. 



Mentum slightly sinuate in the centre, paraglossse rounded 

 outwardly Klepsiijhrus. 



Tarsi not pectinate. 



Joints of antennse very short Astastus. 



Joints of antennse slender ; back part of the head constricted Aiitomaiinus. 



Mentum with a small median tooth. 



Tarsi not pectinate. 



Prothorax much ampliated on the anterior part, with the 

 median part of the base produced beyond the posterior angles Lionychus. 



Prothorax cordiform Apristus. 



Gen. CYLINDROCEANIUS, Chaud., 

 Rev. et Mag. ZooL, 1878, p. 153. 



Mentum broadly notched, with a median sharp tooth, the lateral 

 lobes trigone, rounded outwardly, diverging inwardly at the top 

 and acute ; ligula horny, moderately long, slightly incised at the 

 tip, and with two long setae, paraglossse membranaceous, soldered 

 with the ligula and a little longer, with the tip lanceolate ; mandibles 

 long, sharp, plane above and a little concave underneath ; labrum 

 quadrate, with six setae at the apex ; antennae filiform ; head cylin- 

 drical, not narrowed into a neck behind the eyes, which are very 

 prominent ; prothorax subcordiform, not much narrowed near the 

 base, and with the postical angles projecting ; elytra nearly parallel. 



