new Species of Histeridaj. 2,37 



obs )lete ; the propygidium has a narrow smooth margin 

 anteriorly, otlierwise it is punctate bnt not densely ; the 

 pygidium is very feebly convex and not \evY closely punc- 

 tured ; the prosternuni is without striae; the mesosternum, 

 stria interrupted behind the emargiuation ; the femora are 

 smooth. 



The thoracic and dorsal strife are almost similar to those 

 o{ ellipticus, Mars. ; but acutidens differs in being oljlong, the 

 mandibles with a small acute tooth only, and the pygidium 

 is very slightly convex and not very closely punctate. I 

 have not seen an example of eUipticus with the first dorsal 

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

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

 ticus has the " pygidium bombe, densement ponctue.^^ 



Hub. Isle of Batian {Doherty). 



Platylister habitus, sp. n. 



Ovatus, parum convexus, niger, uitidus ; fronte concava ; pronoto 

 stria laterali baud interrupta ; elytris striis 1-2 integria, 3 in 

 medio interrupta ; propygidio traiisversim puuctaro ; pygidio 

 margine hand elevato ; mesosterno stria integra ; tibiis anticis 

 4-dentati8. 



L. 4 1-5 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, fii'st 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 prosternal keel is a little narrowed before the coxae ; 

 the mesosternum, marginal stria complete, fine and close to 

 the edge at the emargiuation 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. 



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

 Genoa Museum and in mv own collection. 



