284 ]Mr. G. Lewis on 



1878), and I have noticed (Ann. & Mag. Nat. Hist. sor. 7, 

 vol. XX. p. 96, 1907) tliat in some genera the character is 

 sini])Ij specitic. 



List of Species, arranged generically. 



Plasius ruptistrius, ieta I Hister togoii 



I'liitysoma comptum, l>3v,iiviol,ij ^l 



Clirouiis, gen. uov. 



socialis. 



Omalodes gagatiiuis, Er. 

 Ilister moutenegiius, Millies; 



Paromalus tilum, lleitt. 

 Pachycrasrus scitulus. 



luiuor. 



Hetasrius gratus, Leio. 

 Saprinus cseruleatus, Leiv. 



Plcesius ruptistrius^ Lew., 1906. 



Originally I had three exanjples o£ this species, all agreeing 

 in having the thoracic sjfcria interrupted behind the head ; 

 apparently this is the usual form, but I now have a fourth 

 specimen in which the stria is complete. In otlier respects 

 the specimens are exactly similar. 



Platysoma comptum, sp. n. 



Oblongum, parum convexum, nigrum, nitidum ; fronts stria Integra 

 antice recta ; pronoto parce eb minntissime punctulato, stria 

 laterali Integra ; el5'tris striis 1-3 integris, 4—5 dimidiatis, 

 suturali utrinque abbreviata ; propygidio pygidioque immargiuato 

 distincte punctatis ; prosteruo inter eoxas marginato ; mesosteriio 

 sinuato antice haud marginato, stria transversa arcuata, tibiis 

 anticis 4-dentatis. 



L. 2i mill. 



Oblong, somewhat convex, black and shining ; the head 

 sparingly punctulate, feebly impressed anteriorly, stiia com- 

 plete, straight in front, rounded off laterally ; the thorax also 

 sparingly and microscopically punctulate, the marginal stria 

 is extremely fine, inner stria also fine and the interstice late- 

 rally very narrow, but behind the head it widens, and the 

 stria at the basal angle turns itnvards ; the elytra, striai 1—3 

 clear and complete, 4-5 dimidiate and apical, 5 slightly the 

 shortest, sutural longer, but discal being shortened before and 

 behind ; the })ygidia are distinctly not very closely punc- 

 tured, neither are raarginate, but there is a shallow fovea on 

 each side of the pygidium at its base; the prosternum is 

 nuiro-iiied with a stria meeting at both ends in the inter- 

 coxal area ; the mesosternum is widely and feebly sinuous, 

 not marginate, but it is striate on either side and has a wide 

 median arched stria ; the first segment of the abdomen has a 



