120 



CERAHBYCIDJE. 



b 3 . Antennal supports more or less 



depressed. 



a 4 . Antennae spined behind at apex 

 of joints three to ten ........ 



6 4 . Antennae not spined behind. 

 5 . Intercoxal process of pro- 

 sternum truncate or tuber- 

 culate posteriorly. 

 a 6 . First antennal joint with 

 narrow cicatrix at apex . . 

 I 9 . First antennal joint without 



cicatrix at apex. 

 a~. Femora not carinate .... 



b 7 . Femora finely carinate 

 along each side ...... 



b\ Intercoxal process of pro- 

 sternum gradually sloped 

 posteriorly .............. 



b'. Prothorax distinctly longer than broad, 



at least in <$ . 



a 2 . Antennas not fringed beneath in c? ; 

 eyes less deeply emarginate ...... 



b~. Antennae fringed with short hairs 

 beneath in c? ; eyes divided or 

 deeply emarginate .............. 



b. Antennae more or less deeply compressed 

 and dilated on anterior side, not much 

 longer, sometimes shorter, than body 

 in <5- 



a'. Prothorax distinctly longer than broad. 

 }' . Prothorax very little, or not at all longer 



than broad. 

 a' 2 . Elytra not carinate at sides near 



apex. 



a 3 . Prothorax broader than long ; an- 

 tennae as long as body in $ .... 



b 3 . Prothorax not broader than long ; 

 antennae much shorter than body 



in $ 



b~. Elytra carinate at sides near apex . . XOANODERA, p. 148. 



[p. 181. 



HOPLOCERAMBYX, 



DlORTHUS, p. 132. 



PACHYDISSUS, p. 133. 

 DEROLUS, p. 335. 



MARGITES, p. 137. 

 DYMASIUS, p. 139. 



DlALEGES, p. 141. 



SEBASMIA, p. 143. 



[p. 145. 

 TRACHYTOPHUS, 



RHYTIDODERA, p. 146. 



, p. 14 



Genus PLOCJEDERUS. 



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



O&i. Coleopt. viii, p. 254 (1869). 

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



Type, P. cyanipennis, Thorns., a "West-African species. 



Range. Africa south of the Sahara, Western Asia, and Indo- 

 Maiayan Eegion. 



Head with a median carina between the upper lobes of the 

 eyes which extends downwards along the inter-antennary sulcus ; 

 front with a transverse subelliptical impression. Antennae of c? 

 much 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 and to the third, sharply edged in front and angulate 



