ANNULOSA JAVANICA. 47 



Thorax lateribus sexdentatis, dorso subcarinato, fossula utrinque longitudinal! antice posticeque 

 profundiore. Elytra pallidiora punctorum seriebus striata. Corpus fuscum pedibus fuscis. 

 Obs. The Dermestes sexdentatus of Fabricius, which is the same with his Colydium frumen- 

 tarium and the Ips frumentaria of Olivier, but which appears different from the Corticaria fru- 

 mentaria of the EntomologiaBritannica, comes so very near to our species that I have little doubt 

 of its food being analogous. It probably infests rice, as other species of the genus are found in 

 moist sugar. 



Genus TRIBOLIUM, Nobis. Colydium Herbst. 

 Antenna: undecim-articulatae, sub clypeo ad mandibularum basin inserts, articulis basil- 

 aribus octo globosis sub-aequalibus, apicem versus vix crassioribus, tribus ultimis clavam 

 laxam efformantibus; articulis nono et decimo subpateriformibus, ultimo transverso ovali. 

 Os sub clypeo piano transverso ad latera rotundato absconditum. 



Oculi clypeo fere cincti. Thorax transverso-quadratus submarginatus. Corpus depressius- 

 culurn sublineare. Tarsi articulis quinque. 

 Obs. This genus appears closely allied to Colydium and also to have some sort of relation to 

 Colobicus. From the latter it differs in the antennae and form of body ; from the former in the 

 form of head and in being pentamerous. I am indeed inclined to think that the Colydium rufum 

 of Latreille {Gen. Insect, et Crust. Vol. 3. p. 21.) belongs to this genus, if it be not identical with 

 our species ; but the description of the Colydium rufum by this entomologist is too vague to 

 admit of certainty on the subject. 



As the specimen is unique in the collection of the East-India Company, I have been under the 

 necessity of contenting myself with a generic description founded on external characters alone. 



Herbst has very justly remarked the strong connexion which exists between this genus and 

 Dermestes, and there is indeed no doubt of its belonging to the stirps of Necrophaga, as its larva 

 scarcely differs from that of Dermestes except in not being so hirsute. 

 92. Castaneum. T.Jerrugineum, capite thoraceque subtilissime punctatis, elytris punctato-striatis. 

 Colydium castaneum Herbst. 7. 282. tab. 112. fig. 13. E. 

 An Colydium rufum, Lat. Gen. Ins. et Crust, vol.iii. p. 21 ? 

 An Colydium rufum, Fab. Syst. Eleuth. 2. 557. 11? 

 Trogositaferruginea, Fab. Syst. Eleuth. 1. 155. 23. 

 Ips testacea, Fab. Ent. Syst. Suppl. 179. 14 ? 



Synonymia Trogositceferruginece apud Fabricium corrigenda, antennarum enim clava in Lycto navali 

 Ent. Syst. 1. 2. 504. 10, est biarticulata. 



Long. corp. ^. 



Clypeus ante oculos depressus angulis truncatis. Antennce apice pallidiores. Thorax fossula utrinque 



ad marginem posticum impressa. Elytra seriebus punctorum inter strias duabus obscure impressa. 



Corpus subtus obscuro-piceum pedibus rufis. 



Obs. This insect is by Fabricius stated to be most destructive to rice, that is if it be the 



Ips testacea of the Supplement, but of this I have great doubts, as the description is so loose and 



vague that it might suit a Sylvanus. I have, however, found the Tribolium rufum alive among 



insects from India, and according to Herbst it is very destructive in such situations, he haying 



received 



