I9I4-1 F- H. Gravely : An Account of the Oriental Passalidae. 237 



I have also examined specimens from Pedong in the British Museum collection. 



Description. — Length 31-36 mm. Labrum, antennae and mandibles as in A . alutaceo- 

 sternus, but convexity behind left upper tooth not unusually large. Mentum 

 punctured in middle, a very short and more or less indistinct median groove sometimes 

 discernible on anterior margin. Anterior angles of head not prominent lycft outer 

 tubercle broad, its external margin sinuous but without distinctly rectangular enlarge- 

 ment ; extremity truncate and somewhat concave, its anterior angle a little more 

 produced than the inner one. Right outer tubercle rather short, apex simple or very 

 imperfectly divided in profile. Frontal area very variable. Prothorax as in A. wallacei 

 except that the imperfect median groove is more distinct. Scutellum polished, but 

 more or less marked with indistinct punctures ; mesothoracic episterna and sternum as 

 in A. alutaceosiernns ; posterior intermediate areas of metasternum with same scheme of 

 markings as in other members of the genus,' the extent and distinctness of these markings 

 very variable. Hind coxae and abdominal sterna much as in /I. wallacei^ the latter 

 perhaps a little more distinctly punctured laterallJ^ Sides of etytra clothed with 

 short hair, seventh rib usuall}^ more or less thickly, ninth always thickly punctured 

 throughout, tenth with hair-bearing punctures in front. 



Aceraius assamensis, Kuwert. 

 PI. xii, figs. 3>7-Z7(^- 



Regd. No. '^'y Cherra Punji H. H. Godwin-Austeu. 



,t 7^ Manipur ,, 



„ ''-—^ Assam British Museum. 



7070 7082 2859 p MacClclland, E. I. Com- 



pany s Museum, etc. 

 Description. — Lewg^A 31-36 mm. Differs from A. himalayensis in the following 

 respects only : mentum sparsely or not at all punctured in middle ; inner process of left 

 outer tubercle somewhat less acute, but usually larger in proportion to anterior process, 

 in consequence of which the tubercle as a whole seems even broader ; apex of right 

 outer tubercle more or less distinctly bifid in profile, apex of upper portion always 

 less than half as far from apex of lower portion as from right inner tubercle ; scutellum 

 as in A. gr a ndis; posterior parts of Ani^i coxae, and scars of abdominal sterna less 

 smooth ; seventh rib of elytra with or without punctures at anterior or posterior end 

 only. 



Aceraius tavoyanus, n. nom. 

 PI. xii, figs. 38-38((. 

 This species is undoubtedly the same as that from Burma, erroneously described 

 by Kuwert in 1898 under the name pilifer , Percheron. 



Regd. No. f, '^l,—^ Tavoy Museum Collector. 



There is a specimen from Siam in the British Museum. 



.e. coarsely punctured along inner more finely along posterior margin. 



