Genus and Species o/'Rutelidse. 425 



Epicranium coarsely, irregularly, and not very thickly punc- 

 tate, a pale brown hair springing from each pit. Clypeus un- 

 armed, inclined to the rest of the head at an angle of about 140°, 

 and limited off from it by a strong sinuous sutural impression, 

 which is broadly concave forwards in the middle, and convex 

 on each side above and behind the mandibles ; it has the form 

 of an inverted thick T (X) j the perpendicular stroke of which is 

 disproportionately short and broad. Labrum salient, transverse, 

 with its lower margin faintly roundly emarginate. The body 

 of the mandibles is enlarged, and tlie part of them corre- 

 sponding to the apical one of the two teeth into which, in most 

 true Rutelidse, their extremity is externally divided, is pro- 

 duced forwards and upwards into enormous, curved, sickle- 

 shaped, horn-like processes, each of which is furnished near 

 the base, on the upper and outer edge, with a short, sharp, and 

 slightly upturned conical tooth, the representative of the basal of 

 the two above-mentioned teeth in an ordinary Rutelide and of 

 the prominent and recurved outer angle of the mandible in 

 Peperonota. These huge mandibular horns are somewhat com- 

 pressed and subtrihedral, and taper gradually to a sharp point, 

 approximating as they go ; but they do not meet in the middle 

 line, and are fully a millimetre apart at the apex ; like the 

 ungues and the tibial spines of the fore legs, they are of a rich 

 dark (almost black) brown colour, and being, besides, smooth 

 and polished, form a most effective contrast with the light 

 golden brown of the body. 



The other gnathites, so far as can be told without extracting 

 them, differ in matters of detail only from those of such Rute- 

 line forms as Peperonota^ Antichira, &c. 



Measurements of the typical specimen. 



millim. 

 Total length, measured between the fore margin 

 of the clypeus and the most prominent part of 



the pygidium 21 



Length of the pronotum 8 



Width of ditto 10 



Length of the elytra 11 



Width of the conjoined elytra between the humeral 



angles 10-25 



Length of the mandibular horns along the convex 



curvature 11 



Length of the fore femora 4'75 



,, of the fore tibiae 5*5 



„ of intermediate femora 5*25 



„ of intermediate tibiae 4*75 



„ of posterior femora 5*5 



