120 CERAMBYCID.i:. 



b^. Auteniial supports more or less 

 depressed. 

 a\ Antennae spined behind at apex [p. 131. 



of joints three to ten Hoplocebambyx, 



bK Antenn.-B not spined behind. 

 a\ Intercoxal process of pro- 

 sternum truncate or tuber- 

 culate posteriori}'. 

 e". First anteuual joint with 



narrow cicatrix at apex . . Diorthus, p. 132. 

 b'\ First antenual joint without 

 cicatrix at apex. 

 a~. Femora not carinate .... Pachydissus, p. 133. 

 b'. Femora finely carinate 



along each side Derolus, p. ]3o. 



b\ Intercoxal process of pro- 

 feternum gradually sloped 



posteriorly Margites, p. 137. 



b'. Prothorax distinctly longer than broad, 

 at least in (^ . 

 cc. Antennae not fringed beneath in <$ ; 



eyes less deeply emarginate Dymasius, p. 139. 



b"^. Antennae fringed with short hairs 

 beneath in c?; eyes divided or 



deeply emarginate Dialeges, p. 141. 



b. Antennae more or less deeply compressed 

 and dilated on anterior side, not much 

 longer, sometimes shorter, than body 

 in J- 

 a' . Prothorax distinctly longer than broad. Sebasmia, p. 143. 

 /■'. Prothorax very little, or not at all longer 

 than broad. 

 fl". Elytra not carinate at sides near 

 apex. 

 (<?. Prothorax broader than long ; au- [p. 145. 



tennae as long as body in $ .... Trachytophus, 

 h^. Prothorax not broader than long ; 

 antennae much shorter than body 



in 2 Rhytidodera, p. 146. 



Ir. Elytra carinate at sides near apex . . Xoaxodera, p. 148. 



Genus PLOC^DERUS. 



Plocaederus, Thorns. Essai Class. Ceramb. p. 197 (1861) ; Lacord. 



Gen. C'oleopt. viii, p. 254 (1869). 

 Plocederus, Gemm. S,- Harold, Cat. Col. ix, p. 2799 (1872). 



Type, P. qianipennis, Thorns., a "West-Africau species. 



Bange. Africa south of the Sahara, Western Asia, aud Indo- 

 jNIaiayan Eegion. 



Head with a median carina between the upper lobes of the 

 eyes which extends downwards along the inter-antennarv sulcus ; 

 front Mith a transverse subelliptical impression. Antennae of c? 

 niucli longer than the body, those of the $ only a little longer ; 

 third joint one-third longer than the fourth ; fifth to tenth subequal 

 to each other aud to the third, sharply edged in front aud augulate 



