BY THE REV. T. BLACKBURN. 493 



RlIOPiEA. 



I have never seen a specimen that I can confidently affirm to 

 be a female of this genus, although male examples are by no 

 means rare. Germar states that the female of R. heterodactyla is 

 distinguished by its short hind tarsi, and Burmeister adds that 

 the club of its antennse has only 6 joints (that of the male 

 having 7), while Erichson states that the club of the male has 6 

 joints. There is no doubt that the antennal club has a different 

 number of joints in the males of different species, so that it is 

 .possible that the male of one species may have been taken for the 

 female of another. I have in my collection three examples which 

 appear to belong to this genus and which I suspect may be 

 females. They are from widely separated localities and pertain 

 to three species. They differ from the males in being markedly 

 smaller, and in having fewer joints in the antennal club and 

 shorter tarsi, and also in being very much more coarsely and 

 sparingly sculptured than any Ehopcea that I have seen and 

 known to be a male. I should feel greatly indebted to any of 

 my correspondents who could let me inspect a R1io}xea that can 

 be positively affirmed to be a female. 



Anoplognathus brevicollis, sp.nov. 



Sordide brunneo-testaceus, capite prothoraceque certo adspectu 

 cupreo purpureo tincto, hoc oculos versus viridimicanti, illo 

 antice posticeque segmentis ventralibus postice scutello et 

 elytrorum sutura anguste viridi-marginatis, tarsis posteri- 

 oribus basin versus infuscatis ; capite prothoraceque leviter 

 subtilius sat crebre, elytris sat fortiter crebre vix lineatim, 

 pygidio (hoc albiclo-piloso) crebre subtilius subsquamose, 

 punctulatis ; capite magno, antice inter oculos leviter 

 biimpresso, sutura clypeali bene determinata ; prothorace vix 

 canaliculato, trans basin quam longiori multo plus duplo 

 latiori, margine basali quam apical is dimidio latiori, hoc 

 leviter emarginato trisinuato, illo medio vix lobato, lobo 

 postice leviter emarginato, lateribus a basi ad apicem arcuatim 



