new Species of Hhteridse. 257 



obs )1etc ; tlie propygidium has a narrow smooth margin 

 anteriorly, otherwise it is punctate but not densely ; the 

 pygidium is very feebly convex and not very closely punc- 

 tured ; the prosternum is without striae ; the mesosternum, 

 stria interrupted behind the emargination ; the femora are 

 smooth. 



The thoracic and dorsal striae are almost similar to those 

 of ellipticus, Mars. ; but acutidens differs in being ol)long, the 

 mandibles with a small iicute tooth only, and the pygidium 

 is very slightly convex and not very closely punctate. I 

 have not seen an example of ellipticus with the first dorsal 

 stria complete, as figured by Marseul, but his species is 

 well-known and specimens are in most collections. P. ellip- 

 ticus has the " pygidium bombe, deusement ponctue.''^ 



Hab. Isle of Batian [Doherty), 



Platylister habitus, sp. n. 



Ovatus, parum convexus, niger, iiitidus ; fronte coneava ; pronoto 

 stria lateral! baud iuterrupta ; elytris striis 1-2 integris, 3 in 

 medio iuterrupta ; propygidio trausversim puuetato ; pygidio 

 margine haud elevato ; mesosteruo stria iutegra ; tibiis auticis 

 4-dentatis. 



L. 4|-5 mill. 



Oval, rather convex above, black and shining ; forehead 

 concave, stria fine, complete and nearly straight anteriorly; 

 the thorax, marginal stria complete, parallel to the sides, 

 slightly bent inwards at the basal angle; scutellar fovea 

 clear but shallow ; the elytra, first stria complete, second 

 very slightly shortened at the base where the interstice is 

 widest, third widely interrupted in the middle, apical portion 

 longest but varying in length : the propygidium is irregularly 

 transversely punctured in the middle ; the pygidium is 

 similarly punctate at the base and in the middle, but 

 posteriorly the points are smaller and fewer, there is no rim ; 

 the prosterual keel is a little narrowed before the coxse ; 

 the mesosternum, marginal stria complete, fine and close to 

 the edge at the emargination but leaving it laterally ; the 

 anterior tibiae are 4-dentate. 



The form of the pygidium and of the mesosternal stria are 

 good distinguishing characters for this species. P. platy- 

 pygus, Mars., is seemingly similar, but the forehead of 

 habitus is not concave nor punctate, and the stria is feeble, 

 not strong. 



Hab. Paumomu River, New Guinea [Loria). In the 

 Genoa Museum and in mv own collection. 



