I9I4-] 



F. H. GravEIvY : An Account of the Oriental Passalidae. 



231 



Anterior angles always distinctly prominent to greater or less extent, left one pro- 

 jecting more or less markedly further than right. Angles of truncation of left outer 

 tubercle less produced than in A. wallacei; the tubercle as a whole very variable, 

 usually much broader than in that species, though not always, and as a rule 

 thickened near base on outer side, this thickening when unworn and very well deve- 

 loped rectangular as in fig. 27, but more often blunter and occasionally absent. Right 

 outer tubercle normally short; very broadly and more or less obliquely truncate 

 as seen from above, the truncation being sometimes slightly convex, sometimes 

 straighter, and sometimes even sufficiently concave to produce a bidentate form, the 

 outer and still more rarely the inner of the two denticles so formed, being occa- 

 sionally produced into an acute, forwardly directed tooth. Frontal area more or less 

 triangular. Parietal ridges perhaps inclined a little more backwards as a rule than 

 in A . wallacei. Supra-orbital and supra-occipital ridges forming together an open 

 semi-circle, the former approximately parallel to one another in front, rarely or never 

 in the least degree convergent. Prothorax and scutelhim as in A . wallacei ; mesothoracic 

 episterna with a patch of fine hair-carrying punctures in posterior angles as in^ . illegalis ; 

 surface of mesosternum very variable in texture, being sometimes extensively roughened 

 and in one specimen^ even coarsely granular in parts; scars variable in form and 

 definition. Posterior intermediate areas of metasternum as a rule more completely 

 and evenly pimctured than is usual in the genus. Posterior parts of hind coxae 

 finely granular throughout; abdominal sterna as in preceding species. Sides of elytra 

 pilose, densely near shoulders, more spacely further back where the pile is almost 

 confined to the grooves, the ribs (except the anterior part of the tenth) being more 

 or less completely devoid of punctures; the ninth rib more persistently punctured 

 than any other. 



, Aceraius grandis (Burmeister). 



I. A. GRANDIS SUbsp. HIRSUTUS, Kuwcrt. 



PI. xii, figs. 28-29. 

 Regd. No. '^ ?fi . . Darjeeling 



j. 



Sikkiin 



c Stoliczka bequest, 

 ; J. Wood-Mason. 



I Dr. J. Anderson, 

 J E. T. Atkinson. 

 I L. Mandel li. 



Bhutan 



Harmutti, Base of Dafla Hills 



Dikrang Valley 



Dunsiri Valley 



Duffla Expedition 



N.-E. Frontier 



H. H. Godwin- Austen. 



I That from Serai in the Sarawak Museum Collection. 



