97 



the upper outline of the elytra across the commencement of the 

 posterior declivity is distinctly concave, while the lateral part of 

 the elytra descends so abruptly that in the hinder part the 5th 

 interstice appears as the line of contact between two planes 

 placed at a right (or even slightly acute) angle to each other. 

 The extraordinary strongly pediculated and bent front femora, 

 and the remarkable shape of all the tibiae as well as the strangely 

 shaped antennal club (with a pedicle scarcely shorter than the 

 dilated apex) also furnish unmistakeable characters, and the 

 sculpture of the elytra (especially their transversely furrowed 

 appearance almost as in Sclerorhinus nifipes, Blackb.) is also 

 noteworthy. Probably the structural characters of the female 

 are very different, but no female has been described in terms that 

 seem to associate it with the male before me. 



W. Australia ; Upper Murchison R. district ; sent by Mr. 

 French. 



LONGICORNES. 



PEXTHEA. 



P Mastersi, sp. nov. Mas. Dense pubescens' et sparsissime 



nigro-setulosa ; pube albida ochraceo-variegata et passim 



maculis par vis nigris ornata ; antennis quam corpus parum 



longioribus, subtus sparsim capillis nigris fimbriatis, articulo 



3° quam 4 US vix longiori, articulis 1° 2° que griseis nigro- 



maculatis (ceteris piceis ad basin et ad apicem anguste 



griseis) ; capite inter antennas leviter concavo, linea subtili 



integra longitudinal! media impresso; prothorace transverso, 



pone medium leviter trans versim sulcato, ante sulcum trans- 



versim 6-tuberculato, pone sulcum utrinque tuberculo parvo 



obtuso armato ; scutello transverso postice subtruncato ; 



elytrorum sculptura sub pubem fere abdita (costis 3 mani- 



feste apparentibus, internis 2 ante medium desinentibus), 



granulis nonnullis prope basin exstantibus, apicibus sub- 



truncatis. Long., 7 1.; lat., 2J 1. 



This species is I think congeneric with certain small Longicorns 



which Mr. Pascoe described as forming a distinct section of 



Penthea (P. scenica, melanosticta, &c). Mr. Pascoe associated 



with them P. picia, which differs from P. scenica, &c, in being 



clothed with long fine hairs and having very finely granulated 



eyes, and which should I think be placed in Corrhenes ; and I 



should judge from the descriptions that P. crassicollis, Pasc, and 



sectator, Pasc, should also be referred to Corrhenes. The present 



insect is of narrower form than 1\ scenica and melanosticta from 



both of which it also differs inter alia in having a well-marked 



transverse sulcus on the prothorax behind the middle (so well 



marked that its extremities viewed from above look like emargin- 



