326 



Memoirs of the Indian Museum. 



[Vol.. Ill, 



I' Pronotum uupuüctured, except in scars and marginal grooves L. timoriensis, p. ^o^. 

 6' Sides of pronotum more or less thickly covered with strong 



Ip 



l^ punctures 



, ( Central area of metasternum unpunctured 



\ At least a few strong punctures on central area of metasternum 

 /Puncturing of abdominal sterna very variable; punctures, 

 „ j when present, of the usual type 



\ Abdominal sterna covered all over with somewhat obscure, 

 ( broad , shallow punctures . . 



f Posterior intermediate areas of metasternum punctured 



\ Posterior intermediate areas of metasternum unpunctured . . 

 Central part of mesosternum sharply defined on each side by a 

 pair of ridges which, starting from the anterior angles, extend 

 in a straight line backwards and a little outwards till close to 

 the posterior margin, where they curve strongly outwards ; the 



"•i whole of the mesosternum outside these lines depressed and 

 granular ; only the central part smooth 



Mesosternal scars smaller, not occupying the whole of the sides 

 of the mesosternum 



('Lateral grooves of elytra moderately broad, punctures slightly 

 i'\ transverse 



[ lyateral grooves of elytra narrower, punctures, rounder 



f Frontal ridges not reaching anterior margin of head 



i Frontal ridges reaching anterior margin of head . . 



'\. 



L. dentatus, pp. 252 & 303. 

 L. cydotaenius, pp. 255 & 305. 



L. planus, pp. 260 & 310. 



10 

 L. roepstorfi, pp 260 & 30g. 



L. anipnnctus, pp. 256 & 306. 



L. novaeguineae, p. 306. 



L. bicolor, pp 257 & 307. 

 L. obtiisidens, p. 307. 

 confusedly punctured ; elytra reddish in front and black behind L. glaber, p. 307. 



{ Posterior intermediate areas of metasternum finely punctured 

 j in inner a 



r angle ; elytra uniformly coloured 



j Posterior intermediate areas of metasternum strongly and 



VC 



Genus Trichostigmus, Kaup. 



(About 24 mm. long; a few punctures in anterior angles of 

 ' pronotum ; marginal groove of pronotum broad and deep and 

 I coarsely punctured .. .. .. .. T. ^Äorw',Kaup;pp. 261&310. 



, About 17 mm. long; surface of pronotum unpunctured except 



I close to scars ; marginal groove very fine or almost obsolete . . T. ursulus, Schaufuss; p. 310. 



9. APPENDIX III.— THE GENUS TÄRQUINIUS, AND A REMARKABLE 

 NEW GENUS FROM NEW GUINEA. 



Since writing the earlier part of this paper, I have received for examination a 

 very remarkable Passalid from Nev^^ Guinea. Although this insect is not from the 

 Oriental Region, it may conveniently be described in the present paper ; for it will 

 have to be made the type of a new genus, whose position in the classification of Indo- 

 Australian genera outlined above is of peculiar interest. It appears, moreover, to 



1 It is quite possible that this character is of less value than in this case it at present seems to 

 be, and that these two species are not really distinct. 



* This distinction is by no means a satisfactory one; but the position of L. novaeguineae, as ex- 

 plained above (p. 306), has not yet been properly determined. 



