156 Dr. Gr. A. K. Marshall on Alcides, Schonh. 



extremely similar to A. triangulifer. In addition to the 

 characters given in the key, the following distinctions have 

 been noted : — The mentum is quite flat (in triangulifer it 

 bears a shallow longitudinal impression) ; the proportions 

 of the 7th funicular joint to the club are 2-2 f : 3|-4 (in 

 triangulifer 4 : 3-4) , and the intermediate tibiae are simply 

 angulate in the middle internally (in triangulifer there is a 

 sharp tooth). Bit its most striking character is the broad 

 dilatation at the apex of the median lobe of the sedeagus, 

 for in all other species of the group this organ is pointed at 

 its tip, as is usual in the genus. 



Length 8|— 12£ mm., breadth 3]-5^ mm. 



Java. 



All the specimens of this group that I have seen from 

 Java belong to this species. There is in the British Museum 

 a single specimen labelled Singapore (Coll. Atkinson), but 

 it seams possible that the locality may be erroneous. 



Alcides ceramodelta, sp. n. 



J 1 ? . While this species agrees with triangulifer , as com- 

 pared with delta, in the structural characters mentioned in 

 the key, it differs from it in the pattern of the prothorax, 

 which quite resembles that of delta and ephippiatus, the 

 general colour being blackish brown, with the usual oblique 

 lateral pale stripe above the coxae, a transverse subapical 

 pale band running along the anterior edge of the granulate 

 area, and a pale central stripe. 



The general form is broader in proportion to its length 

 than in any of the other species. The rostrum is propor- 

 tionately short and stout, and its apical margin is rounded, 

 with traces of very feeble undulations ; the peduncle of the 

 submentum differs from that of all other members of 

 the group (except A. muiri) in its more narrowly oblong 

 form. In the autennaethe 7th joint of the funicle is shorter 

 than the club (3:4)'*. The prothorax is very similar in 

 shape to that of triangulifer, but the granules are slightly 

 smaller and there is no trace ot the shallow median stria. 

 The scutellum is bluntly pointed at its apex, whereas in 

 all the other species it is broadly rounded. The intervals 

 on the elytra are more distinctly granulate than in delta 

 and rather less carinate than in triangulifer, thus giving the 



* By actual measurement ; owing to the club being pointed, it appears 

 relatively shorter than it really is. 



