152 Mr. H. W. Bates on the 



Pachydissus [Mallambyx] japonicus^ n. sp. 



P. minus convexus, olivaceo-fuscus, pube subtili fulvo-grisea 

 vestitus ; thorace elytris multo angustiore, medio paulo dilatato, 

 antice fortiter angustato, supra minus profunde flexuoso-plicato ; 

 elytris laevibus, apice singulatim rotundatis angulo suturali spi- 

 noso; antennis {S) corpore dimidio longioribus, omnino inermibus, 

 articulis tertio quartoque apice paululum iucrassatis, 4'° quam o^ 

 multo breviore. Long. 1 in. 5 lin. to 2 in. c? $ . 



Japan. 



Agrees with the typical (Australian) species oi Pachydissus in 

 the unarmed antenna; and thorax and the finely pubescent sur- 

 face; but differs much m fades and in the very slight nodosity of 

 the 3rd and 4th antennal joints. The combination of characters 

 which the species offers renders it ill-placed in any of the genera 

 hitherto proposed in this group ; and it may be found conve- 

 nient to separate it under the generic name Mallamhyx. The 

 sockets of the anterior haunches are angulate externally ; but 

 this character is not even of generic importance, although La- 

 cordaire founded a section upon it ; for some Australian species 

 of Pachydissus possess strongly angulated acetabula, whilst 

 others, veiy closely allied, have them only circular. The pro- 

 sternal process is a little prominent at the edge of its posterior 

 declivity ; the mesostemum plane. The crown of the head 

 has a single (central) groove, extending behind to the neck, as 

 in Ceramhyx and Hoploceramhyx^ and not ending in a trans- 

 verse groove at the level of the posterior margin of the eyes 

 as in Pachydissxis. 



Pachydissus (?) fidvidus^ Pascoc. 

 Pachydissus (?) fulvidtis, Pascoe, Trans. Ent. See. new ser. iv. p. 236. 



One example, Nagasaki ; also North China. 



The elytra are clothed Avith rather coarse, uniform, laid, 

 tawny pubescence, and are rounded at the apex. The species 

 may possibly come within the proposed genus Mallamhyx ; but 

 I have seen only a female specimen, and therefore cannot 

 decide. 



Neoceramhyx chrysothnx^ n. sp. 



N. forma et colore Cer. aurifahro (WTiite) similis, at difFert antennis 

 nullomodo spinosis, nee thorace transversim plicato. Elongatus, 

 subcylindricus, fulvo-fuscus, tomento sericeo mutabili vestitus ; 

 thorace utrinque medio spinoso, supra grossissime irregulariterru- 

 goso et tuberculato, ad basin sulcis binis transversis ; elytris 

 apice breviter oblique tnmcatis, angulo exteriore paiilo producto 

 acuto, suturali longe spinoso ; antennis ( $ ) articulis y^-G"'" singu- 



