1914-] F. H. Gravely : An Account of the Oriental Passalidac. 319 



Genus Taenioers, Kaup. 



j' Upper surface of central tubercle about twice as long as broad, 

 j flat, punctured, bordered by very distinct liorse-shoe-shaped 

 ^ ! ridge which is open in front .. .. .. T. bicantha/iis, pp. 208 & 270. 



I Upper surface of central tubercle relatively broader as a rule, 



less flattened, unpunctured, marginal ridge often indistinct or 

 1^ absent across middle-line behind as well as in front .. .. .. 2. 



^ Anterior tibiae very broad . . .. .. .. T. platypus, p. 2yo. 



( Anterior tibiae slenderer . . . . . . . . . . , 3. 



Anterior margin of canthus meeting side of head a considerable 



distance behind anterior angle; external angle of canthus 



obtuse . . . . . . . . . . T. pygmaeus, pp. 209 & 271. 



Anterior margin of canthus meeting side of head a very short 



distance behind anterior angle; external angle of canthus 



sharper . . . . . . . . . . T. bicuspis, pp. 210 & 272 



Genus Aulacocyclus, Kaup. 



Apical portion of central tubercle not very strongly bent over 

 forwards, directed a little upwards rather than downwards, the 

 upper margin straight . . . . . . . . . . _ 2. 



Apical portion of central tubercle more strongly bent over for- 

 wards, never upwardly directed, at least the extreme distal 

 portion of the upper margin bent a little downwards . . . . . . 3. 



/Dorsal grooves of elytra unpunctured . . . . . . A. rosenhergii, p. 274. 



2' Dorsal grooves of elytra very distinctly punctured, as in the 

 (^ the two following species . . . . . . ..A. dilatns, p. 276. 



j Central tubercle as seen from above not or scarcely broader in 

 o j front than behind . . . . . . . . a 



\ Central tubercle seen from above much broader in front than 

 [^ behin 



rApi 

 4) war 



d .. .. .. .. A. andrewsi, p. 2:1 & 2y^. 



Apical portion of central tubercle very short, not bent down- 

 wards as a whole .. .. .. .. A. amensis,p. 2J7. 



Apical portion of central tubercle much longer, very slightly 



but distinctly bent downwards as a whole .. .. A. parryi, p. 2'^6. 



Genus Ceracupes, Kaup. 



f Apex of horn formed by fusion of central tubercle with ante- 



I rior margin of head bifid . . . . . . . . . _ 2. 



(^ Apex of this horn acute . . . . . . . . C. austeni, pp. 212 ct 278. 



( Upper surface of this horn roughly parallel-sided throughout . . C. arrowi, p. 278. 



( Uper surface of this horn much broader in front than behind C. frDnticornis pp. 212 i^ 277. 



Genus Cylindrocaulus, Fairmaire. 

 Onh' one species, C. bucerns, p. 279. 



Genus Auritulus, Zang. 

 Only one species, A. patalis, p. 279. 



