BY THE REV. T. BLACKBURN. 275 



This species is another member of the longipennis group, in all 

 of which I notice the corbels of the hind tibise are not quite so 

 simply open as in others of the genus ; this is owing to the 

 external face of the tibia being a little gibbous just before the 

 apex, but the margin of the tarsal aperture is not bent inward 

 beyond the general external outliae of the tibia as it is when 

 cavernous (in Leptops, &c.). This species inter alia differs from 

 F. longipennis and satelles by the absence of a defined basal 

 margin of the elytra, and intei' alia from P. rostralis b}^ the much 

 longer and more slender scape of its antennre. Owing to its short 

 oval form it has somewhat the facies of Strophosomus. 



S. Australia; Port Augusta. 



POLYPHRADES TIBIALIS, Sp.nOV. 



^. Elongato-ovalis ; piceo-niger, squamis fusco-ferrugineis et 



setis brevibus erectis plus minusve vestitus ; rostro longitu- 



dinaliter subtiliter 3-carinato ; capite minus crebre punctu- 



lato ; oculis elongato-ovalibus ; funiculi articulo basali 2° 



3°que conjunctis longitudine sequali, scapo oculum hand 



superanti ; ])rothorace quam elytra multo latiori, antice sat 



fortiter angustato, quam longiori dimidio latiori, ad latera 



valde rotundato-ampliato, crebre minus crasse (in disco trans- 



versim, latera versus magis granulatim) ruguloso ; elytris ad 



basin linea subtili cariniformi marginatis et quam prothoracis 



basis parum latioribus, mox pone basin angustatis, striatis, 



striis flexuosis cancellato-punctulatis, interstitiis convexis, 



humeris extrorsum prominentibus ; tibiis anticis flexuosis, 



intus infra medium late profunde emarginatis et ad apicem 



valde angulato-dilatatis. [Long. 4, lat ly^ lines. 



This species (at any rate its male) differs from any other of 



the genus yet described by its extraordinary front tibiae, which are 



flexuous externally and on the inner side are scooped out by a 



deep emargination in nearly the whole of their lower half, but at 



the apex are suddenly dilated inward into a large triangular 



process. The great size of the prothorax (by measurement 



decidedly wider than and more than half as long as the elytra) is 



