206 Mr. J. O. Westwood's Descriptions 



Long. Corp. liii. 9 ; mandib. fere lin. 2 ; lat. protlioracis antice 

 lin. 4. 



Habitat in Americae meridionalis partibus centralibus. 

 In Mus. Deyrolle, Parisiis. 



Mas. — Caput latum, transversum, antice late eniarginatum, 

 angulis anticis oblique truncatis, et in lobum depressum 

 utrinque dilatatis, postice oculos dimidiatim dividentibus ; ver- 

 tice utrinque tumido discoque utrinque pone oculos impressione 

 rotunda notato. Mandibulse capite paullo longiores subrectae, 

 apice subauriculatas vel potius subdigitatae,basi intus in dentem 

 obtusum productas. Maxillae lobis elongatis obtusis dense 

 setosis. Mentum transversum, antice parum emarginatum, 

 ciliatum, angulis anticis lateralibus rotundatis. Labrum lobis 

 duobus gracilibus setosis. Palpi labiales graciles, articulo 

 Imo longo, 2ndo breviori, 3tio paullo crassiori. Antennae 



, breves, articulis 2-7 fere sequalibus, 8vo, 9no et ultimo intus 

 acutis. Prothorax transversus, antice capitis latitudine, pos- 

 tice sensim angustior, medio marginis antici elevato et paullo 

 prominenti, disco in medio canaliculate impressioneque pro- 

 funda rotunda inter medium et angulos anticos, his porrectis, 

 angulis posticis acutis. Elytra prothorace paullo angustiora, 

 angulis anticis acuminatis disco subconvexo, singulo costa 

 valida nitida longitudinali submedia instructa striisque sim- 

 plicibus impressis, interstitiis inter strias punctatis. Pedes 

 graciles, tibiae anticae serrulatae, dentibus 7 vel 8 majoribus 

 (sensim versus basin magnitudine decrescentibus) armata?, 

 intermediae spina parva media alterisque 2 vel 3 minutis 

 inter medium et basin ; posticae spina media unica ; tarso- 

 rum articulis subtus setosis. Corpus subtus nigrum, nitidum, 

 punctatum, prosterno punctatissimo. 



Plate XI. fig. 2, Scierostomus hastatus slightly magnified; 2a, the head seen 

 beneath ; 2 b, maxilla ; 2 c, mentum seen from within the mouth ; 2 d, prester- 

 num seen sideways. 



This species is remarkable, not only on account of the curious 

 form and sculpture of its head, mandibles and prothorax, but also 

 for its colouring (which is quite unusual in the present family), 

 and for the strong costation of its elytra. It appears to be closely 

 allied to Scl. plagiatus, Burm. Handb. d. Ent. v. 425. I have 

 seen but a single specimen of the male, in the rich Collection of 

 M. Deyrolle, of Paris. 



