43 



H. ingens, sp. no\-. Late ovalis ; opacus ; g'laber, niger, oorpore 

 subtus pedibusque brunnescentibus ; prothoracis lateriVais 

 foliaceia sparsim minute granulatis disco cornu valido oonico 

 armato ; elytrorum disco confuse minus sparsim punctulato 

 et obsoletissime quadricostato (costa externa quam ceterre 

 paulo fortiori et granulis conicis sat validis armata), sutura 

 fortissime carinata, lateribus foliaceis sat crebre sat fortiter 

 granulatis, raargiue retiexo fere vertioali; subtus elytrorum 

 marginibus foliaceis crebre obsolete punctubitis. Long., U 

 —15 1. ; lat, 9—10 1. 

 An exceptionally opaque species. Viewed from the side, tlie 

 reflexed margin of both prothorax and elytra appears vertical and 

 very little rugulose, with the lower edge marked by a very strong 

 longitudinal carina, as in .//. lubricus. The strong convexity of 

 the disc of the elytra and the comparative flatness of their foliac- 

 eous margins give this species a distinct appearance ; owing to 

 this, if it be viewed from the side, the upper outline of the re- 

 flexed margin seems almost to bisect the insect, so that the top of 

 the elytra seems nearly as high above the said line as the meta- 

 sternum is below it ; 'while in all the preceding three species, it 

 they be viewed similarly, the corresponding line seems very much 

 higher, so that the top of the elytra is much nearer than the 

 metasternum to it. Of previously^lescribed species of this 

 section of Helwus {i.e., Section I. of Sir W. Macleay's Revision), 

 II. colossus, De Breme, is the only non-nitid species having tlie 

 elytral disc minutely and confusedly granulate ; in that, liowever, 

 the foliaceous margins of the elytra are marked with large scat- 

 tered punctures, whereas in U. ojKicus they are strongly granu- 

 late. Although this species was not taken by the Elder Expedi- 

 tion, it seems convenient to describe it here as being a species 

 from Central Australia closely allied to the preceding three. 

 Central Australia ; McDonnell Ranges. 



SARAGUS. 



S. tricaririaf/iix, sp. nov. Brevis ; sat parallelus ; minus con- 

 vexus ; minus nitidus ; glaber ; capite prothorace<iue crebre 

 minute punctulatis ; hoc quam longiori (et postice quam 

 antice) fere duplo latiori, a basi antrorsum arcuatim angust- 

 ato, obsolete canaliculato, lateribus late explanatis, marg- 

 inibus baud reflexis vix incrassatis ; elytris obsolete sat 

 crasse nee rugulose (nonnullis exemplis vix manifeste) 

 punctulatis, acute tricostatis (sutura hand elevata), costis 

 longe ante apicom abbreviatis, spatio suturali late depresso ; 

 tibiis anticis ad apicem extus baud dentiformibus. Long., 

 6 1. ; lat., ^ 1. 

 An extremely distinct species witli a general resemblance to 



