Australian Coleoptera. 225 



characters are chiefly distinguished by ]M. de Bonvouloir i?iter se 

 by antennal differences ; of them Namobitis and Crypiosfotna are 

 American genera wliose antennal structure is very different 

 indeed from that of Dyscolocerus. Orodotes is an Australian genus 

 distinguished from Dyscolocerus by its propleuri being " notably 

 dilated on the external side " (a character I cannot find in the 

 insects before me) and its antennal joints gradually elongating 

 from the 4th (not, as in Dyscolocerus suddenly from the 9th). 

 The unique species {O. Jansoni^ Bouv.), moreover appears to be 

 extremely unlike the following two species in its superficial 

 chai'acters. This leaves only Dycolocerus, with the diagnosis of 

 which the following two species (and D. heros) would agree quite 

 satisfactorily if the antennse were characterised as having the 9th 

 and following joints merely "all much longer than any of the 

 preceeding 5 which are subequal;" but M. de Bonvouloir adds as 

 a generic character " 9th joint (alone) subequal to the preceeding 

 5 together," which is not the case with any of tlie Australian 

 species I attribute to Dyscolocerus. 



D. concolor, sp. nov. Sat elongatus, sat convexus, postice 

 attenuatus ; Isete ferrugineus ; pube fulva sat dense vestitus ; 

 capite crebre minus fortiter vix rugulose punctulato, in medio vix 

 depresso ; antennis sat elongatis, articulis 1" ad oculi margiiiem 

 posticum attingenti, 2" brevi, 3" quam 1"' fere duplo breviori, 4° 

 quaiii 3"" sesquibreviori, 4"-7° inter se sat jequalibus, 8" quam 7"' 

 paullo breviori fere transverso, 9" quam 6"''-8"' conjuncti vix 

 breviori, 10° quam 9"' parum breviori, 11° quam 9"* parum 

 longiori, articulis 9°-ll° sat cylindricis ; prothorace transverso, 

 ut caput punctulato, a basi ad apicem angustato sed vix 

 arcuatim, supra fere fequali sed trans basin summam depresso, 

 hac fortiter bisinuata, angulis posticis acutis vix divergentibus ; 

 elytris subfortiter striatis, interstitiis minus crebre vix fortiter 

 punctulatis ; coxarum posticarum lamina ad basin fortiter 

 angulatim dilatata, hinc ad marginem lateralem fortiter ajqualiter 

 gradatim angustata ; tarsorum posticorum articulo basali quam 

 2>iB.j.us conjuncti vix breviori ; corpore subtus confertim punctu- 

 lato. 



Maris segmento ventrali apicali ad apicem leviter angulata. 



Feminfe segmento ventrali apicali ad apicem late arcuato, 

 nullo modo angulato. 



