152 Mr. H. W. Bates on the 



Pachydissus [Mallambyx) japonwus, 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 ( <3 ) corpore dimidio longioribus, omnino inermibus, 

 articulis tertio quartoque apice paululum iucrassatis, 4 t0 quam 5*° 

 multo breviore. Long. 1 in. 5 lin. to 2 in. <5 $ . 



Japan. 



Agrees with the typical (Australian) species of Pachydissus in 

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

 face; but differs much in 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 Mallambyx. 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, very closely allied, have them only circular. The pro- 

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

 declivity ; the mesosternum plane. The crown of the head 

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

 in Cerambyx and Hoplocerambyx, and not ending in a trans- 

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

 as in Pachydissus. 



Pachydissus (?) ftdvidus, Pascoe. 

 Pachydissus (?) fulvidw, Pascoe, Trans. Ent. Soc. new ser. iv. p. 236. 



One example, Nagasaki ; also North China. 



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

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

 may possibly come within the proposed genus Mallambyx ; but 

 I have seen, only a female specimen, and therefore cannot 

 decide. 



Neocerambyx chrysothrix, n. sp. 



N. forma et colore Cer. aurifabro (White) similis, at difFert antennis 

 nullomodo spinosis, nee thorace transversim plicato. Elongatus, 

 subcylindricus, fulvo-fuscus, tomento sericeo mutabili vestitus ; 

 thorace utrinque medio spinoso, supra grossissime irregulariter ru- 

 goso et tuberculato, ad basin sulcis binis transversis ; elytris 

 apice breviter oblique truncatis, angulo exteriore paulo producto 

 acuto, suturali longe spinoso ; antennis ( £ ) articulis 3°-6 um singu- 



