3SG Mr. G. Lewis on 



criminately placed in Apohletes and Platysoma, which have 

 an almost inipiinctate pygidium, with two large and deep 

 excavations in the base near the outer edge. With this 

 exception the general characters of these species agree with 

 Platysoma ; but I think it is now time to separate them, and 

 I propose to adopt Liojjygus as a generic name for them. I 

 include in it decemstriatus , Mots., cavatus, Lew., e.viguum, 

 LiQW.ffameh'cus, Lew., Gestroi, Lew., and diopsipygus, Mars. 



Pachycrcerus violaceipennis^ sp. n. 



Obion go-ovatus, niger, elytris subviolaceis ; frouto bistriata, striis 

 laivissime impressis ; mesosterno parum acute producto, antice 

 immarginato. 



L. 4 miU. 



Oblong-oval, black, shining, elytra with a violet tinge ; 

 forehead and clypeus widely excavated and sparsely punc- 

 tulate, stria well marked over and in front of the eyes, but 

 after passing the base of the mandibles it splits into two and 

 becomes very fine, the anterior branch taking a semicircular 

 course, and the posterior branch bending in the middle in the 

 reverse direction towards the neck ; thorax punctulate on the 

 disk, punctures at the sides larger and more closely set, ante- 

 rior angles a little deflexed and a little acutely produced, with 

 an impression within the angle, marginal stria complete ; 

 elytra, stria? l-o complete, fourth shortened at the base, fifth 

 nearly one third the length of the elytron, sutural reaching, and 

 widening out a little at, tiie scutellura, and aplcally the interstice 

 is slightly narrowed ; propygldlum rather closely punctured, 

 punctures on pygidium more dense ; prosternum, keel flat, 

 with lateral strlai fine and parallel before the coxas, and widen- 

 ing out a little at the base, surface sparsely punctulate ; 

 mesosternum somewhat acutely produced anteriorly, with a 

 fine oblique stria at the sides only ; the stria is common to 

 the metasternum also. The mesosternum and first segment 

 of the abdomen punctulate like the prosternum, but the meta- 

 sternum is nearly smooth. 



The frontal strise are a remarkable characteristic in this 

 insect. 



Ilab. Itembo, Central Congo {Duvivier). 



Hister recurvus, Mars. 



This species is a maculate one ; it has two large lobe-like 

 red spots at the base of the thorax, well separated from each 



