SYSTEMA CERÀMBYCIDARUM. 



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206. Tetradia Thomson N. G. 



<? Corpus amplum ; antennœ corpore paulô longiores, 11-arli- 

 culatae,artic. 3° sequente vix longiore, cœteris decrescenlibus ; oculi 

 grossè granulati : prothorax lateraliter valdè 4 tubereulatus, tuber- 

 culîs anticis rotundatis, posticis spiniformibus ; scutellum magnum 

 triangulare ; elytra basi bigibbosa et bicristata, convexa, apice 

 truneata ; prosterni appendix laminiformis, augusta, concava ; 

 mesosterni appendix subproeminens ; pedes robusti sed non clavati; 

 tarsi lati, prsecipuè antici. 



Type: Tetradia fasciatocollis Thomson. 



Long. 14 Mill. Lat. 7 Mill. 



Pubescentia brunneo-setosa tecta, hue et passim obscurè brunneo 

 vel ferrugineo variegata ; occiput 4 tuberculatum ; prothorax inae- 

 qualis ; elytra basi obscura, punctata, post médium cristis 2 parvis 

 nigrorum pilorum ornata ; corpus subtus pedesque ferrugineo- 

 variegata. Natal. 



o o Oculi sub tenuè granulati : 



207. Dichostates Thomson. 

 Ess. Class. Céramb. p. 36. 



Type : D. Concretus PascoeTrans. Ent. Soc. 1856, p. Î7. 

 Syn : D. Natalensis Thomson Ess. Class. Céramb. p. 37. 

 Natal. 



208. Pterotragus Chevrolat. 



Rev. Mag. Zool. 1856, p. 488. 



Type: P. Lugens Chevr. 1. c. Vieux Calabar. 



209. Geteuma Thomson N. G. 



Corpus amplum ; antennae corpore breviores, ll-articulatœ, art. 

 3° cœteris longiore, sequentibusdecrescentibus; prothorax cylindri- 

 cus, dorso spinis 2 elongatis armatus ; elytra basi valdè bigibbosa, 

 humeris prominulis, apice rotundata ; prosterni et mesosterni ap- 

 pendices laminiformes, latissimi ; pedes subclavati ; tarsi mé- 

 diocres. 



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