336 Mr. G. J. Arrow on a Contrilndion to the 



elongate, with a distinct, bilobcd, strongly cliitinised ligula. Pro- 

 thorax entirely simple. Prosternnni forming a very prominent 

 tinger-like process behind the front coxa*. I'ropygidium without 

 stridulating apparatus. Front tibia; 3-dentate, the four posterior 

 ones narrow, spiuose (not digitate) at the extremity. Basal joint of 

 the tarsi not dilated. 



^ . Clypcus shorter and broader. Front tarsi thickened, with the 

 inner claw broad and minutely cleft, 



liiUclorydcs tristis, sp. n. 



Glaber, niger, nonnunquam laBvissime aiueus, elongato-ovatus, 

 inermis, clypeo lato, antice refiexo, minute sinuato, rugose punctato, 

 fronte fortiter laxe punctato ; protliorace similiter punctato, lateribus 

 leviter arcuatis ; scutello hand acuto, minuUssiuie punctato ; elytris 

 baud grosse, sat ie(jualiter, annulato-punctatis ; pygidio minute et 

 densissime punctulato ; corpore subtua medio kevi, metasterni lateri- 

 bus rugosis, abdominis lateribus irregulariter punctatis, transverse 

 ciliatis : 



6 1 pygi'-^^o majore, convexo : 



5, elytrorum marginibus lateralibus ante medium obtuse an 

 gulatis, superficie postica minute et dense punctulata. 



Long. 16-21 mm. Lat. max. 9-iro mm. 



Hab. Sierra Leone ; Portuguese Guinea : Bissao 

 (Favarel). 



There are several specimens in the British Museum and 

 M. Rene Oberthiir's collection. 



It is very much like the species of the American genus 

 Dyscinetus, to which it is closely related, and might be 

 regarded as a representative of that genus which has 

 strayed across the Atlantic. The prothorax is rather more 

 closely adapted to the hind-body than is usually the case 

 in D/jscmctnH and its jjosterior angles are not rounded off. 

 The pygidium also is larger, more convex and less promi- 

 nent. Bcrhaps the most interesting and peculiar feature 

 is one found only in the female, in wliich sex the whole of 

 the posterior part of the elytra is closely and microscopically 

 punctured. 



Mr. Peringuey has made a genus ( Vcnedns), for ILicro- 

 nychus paradoxus, Bohem., supposing liis only example 

 to be a male; but both genus and sjaecies are redundant, 

 being based upon the female of the curious Xcuddorus 

 Janus, F., which occurs on the Gold Coast, in the Congo, 

 Angola, Natal, etc. 



