neto Species of lllstevid-x. 11 



apj)roac]ies near the edge anteriorly and terminates poste- 

 riorly without joining- the metasternal lateral stria ; the meta- 

 sternum has a longitudinal median sulcus in the anterior area ; 

 the anterior tibiae are 4-dentate, intermediate and posterior 

 tibias somewhat widen out gradually to the base. 



The tarsal grooves of this species are straight, and in this 

 respect agree with those of Platysoma exortivum^ Lew. The 

 last Schmidt considers belongs to the genus Phelister ] so 

 until a new genus is established I follow his views. 



Both species are at present unique in my collection. 



Bah. Tarn worth, New South Wales {Lea, 1247). 



Pachycrcerus cceruleafus, sp. n. 



Ovalis, supra parum convexus, cseruleo-metallicus ; antennis pedi- 

 busque rufo-brunneis ; clypeo impresso a froiite distiucto, stria 

 Integra valida ; pronoto lateribus fortius punctato, stria marginali 

 antice interrupta ; elytris striis 1-4, suturali, et humeralibus 

 iutegris, 5 dimidiata ; prosterno bistriato ; mesosterno antico 

 margin ato ; propygidio pygidioque punctatis. 



L. 4 mill. 



The species is the same size and shape as P. cyaneus, Er., 

 and is very similar in sculpture. It differs in the forehead 

 being clearly punctulate, the fourth, sutural, and two humeral 

 strige are complete (although the sutural stria is somewhat 

 fine and vague at the base), the apices of the elytra are trans- 

 versely punctured, and the prosternal keel is rather narrower. 



Ilab. Matadi, Congo River {J. A. Clark). Two examples 

 were captured amongst many dozens of P. cyaneus, Er. 



Pachycrcerus pullus (Gerst.). 



I'laiysoma pidhim, Gerst. Arcliiv fiir Naturg. xxxiii. p. 31 (1867). 



This species closely resembles Pachycrceriis tenuistriatuSy 

 Lew. 1 saw Gersl acker's type in Berlin, and I afterwards 

 sent my type of P. tenuistriatus to Herr Kolbe for comparison 

 with it, who has kindly sent me the following note about it: — 

 " P. tenuistriatus is larger, the elytra shorter, fourth stria 

 oblique, in jmllus it is parallel to the third, the punctuation 

 is more dispersed on the elytra and occupies but an apical 

 quarter of them, in puIIus it occupies half." 



CllALCURGUS, Kolbe. 

 Chalcurgus, Kolbe, Deutscb-Ost-Afiika, iv. Col. p. lUO (1807). 

 I have seen the two species, C. cyaneus and C. minor, 



