1914-] F- H. GraveIvY : An Accoujit of the Oriental Passalidae. 215 



scattered punctures; mesothoracic episterna punctured above and along anterior 

 margin; mesosfernum without scars, finely and more or less extensively striato- 

 punctate and sometimes hairy in front, punctured and hairy in lateral angles, 

 otherwise smooth or transversely (more rarely longitudinally) wrinkled. Metasternum 

 with central area more or less well, lateral areas ill, defined; latter very broad, often 

 almost touching former ; central and posterior intermediate areas smooth and polished ; 

 anterior intermediate and lateral areas punctured and hairy. Anterior margin of 

 posterior part of hind coxae depressed and roughened, abdominal sterna and rest of hind 

 coxae smooth. Elytra hairless, innermost groove of each almost entirely smooth, 

 remaining grooves strongly punctured. 



Habits. — Dr. Annandale informs me that this species is probably not gregarious. 

 Mr. Bainbrigge Fletcher sent me specimens apparently obtained together with 

 colonies of Basilianus, but he did not get many so probably they were living singly 

 or in pairs with the other species. 



Subfamily ACERAIINAE. 

 For the classification of this subfamily which is adopted here see Appendix 

 I (below, p. 316). 



Genus TIBERIOIDES, Gravely. 

 Tiberioides kuwerti (Arrow). 

 PI. xi, fig 14. 

 Reed. No. ^ ^ ( " Sikkim " Stoliczka bequest, J. Wood 



* i ne,i (U43 9-t75 ( 



{ 1 14 18 ' Mason, etc. 



,, ~ Peshoke, Darjeeling District, a, 3000 ft. F. Hannyngton. 



6i^ if" Manipur H. H. Godwin- Austen. 



Description. — Length 36-44 mm. Labnmi as long as or somewhat longer than 

 broad; sides straight, parallel; anterior margin concave; angles rounded, left one 

 frequently somewhat sharper and a little further removed from deepest point of 

 concavity than right one. Mandibles with upper tooth very feebly developed, 

 anterior lower tooth consisting of a small anterior conical portion (that of the left 

 side being truncate and that of the right pointed) and a still less prominent posterior 

 portion. Anterior margin of median part of mentum with slight (often almost 

 imperceptible) hollow in middle; lateral parts punctured evenly all over as a rule. 

 Upper surface of head roughened, central tubercle extending back as a low mound 

 between, and sometimes not clearly separated from, low rounded parietal ridges 

 which extend outwards and are scarcely if at all crested. Inner tubercles almost 

 equidistant from each other, from outer tubercles, and from central tubercle; ridge 

 joining inner tubercles to each other and to outer tubercles forming single continuous 

 curve when viewed from above. Outer tubercles with two widely separated rectangular 

 apices one above the other. Supra-orbital ridges very broad and smoothly rounded 

 behind, not peaked, hollowed out in front so that each forms two narrower divergent 

 ridges of which the outer one extends to the anterior angle of the head. Anterior 



