200 Mr. G. J. Arrow on 



P. congoensis, sp. n. (Plate IX, fig. 7.) 



Testaceus, prothoracis marginibus antica et postica nigris, ad latera 

 attingentibus et haec saape colorantibus ; elytris nigris, macula 

 angulata humerali, fascia angusta multidentata media ad marginem 

 externam attingente marginibusque laterali et apicali flavis, margine 

 apicali tenui, subtiliter dentato, vix ad suturam ascendente ; corpore 

 subtus infuscato, pectoris partibus mediis pedibusque flavis, genubus 

 leviter infuscatis ; capite ssepe nigro-punctato, prothorace fere trans- 

 verso, lateribus antice rotundato- ampliatis, postice paulo concavis, 

 angulis posticis rectis ; elytris fere parallelis, lnuneris evidentibus. 

 Long. 14-17 m.m. 



Hab. Upper Congo. 



This species, of which I have examined many examples, 

 closely resembles P. marginatns, but the apical border of 

 the elytra is very narrow and not sharply limited interiorly 

 and the black front and hind borders to the prothorax 

 extend right across to the sides and may even tinge the 

 extreme lateral margins. 



# 

 P. rccticollis, sp. n. 



Prsecedenti valde affinis, capite prothoraceque rufo-testaceis, illo 

 ante oculos pallid iore, prothorace antice et postice vage lateribusque 

 extremis subtilissime nigro-marginatis, his vix arcuatis^ prothorace 

 postice paulo contracto, elytris nigris, macula humerali non angulata, 

 fascia angusta media dentata ad marginem externam attingente 

 marginibusque laterali et apicali ut in praacedenti flavis ; corpore 

 subtus testaceo, mesosterno lateraliter abdomineque plus minusve 

 infuscatis, pedibus testaceis, genubus nigro-maculatis. Long. 15 m.m. 



Hab. Upper Congo. 



I have seen four specimens of this species, which may be 

 very easily confounded with P. congoensis. The differential 

 characters, however, though slight, are numerous and con- 

 stant. The head and thorax are of a deeper colour, the 

 extent of which is limited anteriorly by a curved line be- 

 tween the eyes, and there is no black spot on the vertex. 

 The prothorax is longer, less dilated in front and broader 

 behind. The elytral fascia is a little less dentate, the 

 humeral spot is less pointed behind, there is less black 

 on the underside and the knees are more deeply tinged. 



But for the difference of habitat I should regard this as 

 probably identical with some of the specimens referred 



