290 Mr. C. J. Galian on neio 



so likewise are the two posterior spines ; tlie disk bears two 

 feebly raised humps which are strongly and closely punctured. 

 The elytra are devoid of pubescence, but under the lens are 

 seen to bear numerous minute granules which seem to corre- 

 spond to the setigerous punctures of 0. adustus, Pasc. The 

 underside of the thorax has a fulvous pubescence. The 

 abdomen is glossy, sparsely punctured and almost impubescent ; 

 the fifth ventral segment of the male is feebly emarginate 

 (almost truncate) beliind. The antennae are slightly longer 

 than the body ; the first two joints and the base of the third 

 are thickly and strongly punctured ; the third (except at 

 the base) and the remaining joints are very minutely and 

 closely punctulate and opaque ; some feeble or obsoletely 

 raised lines are to be seen on nearly all these joints ; each 

 joint from the third to the tenth is acutely angular or toothed 

 on the outer side at the apex, and is produced into a distinct 

 dentate or spinous process on the inner side. These cha- 

 racters of the antennae would almost justify the separation of 

 this species into a distinct genus ; but in other respects 

 it agrees very well with the remaining two species of 

 Osphri/on. 



Gnathonyx, gen. nov. 



c5' . Capito lato, maguo ; oculis supra distantibus ; mandibulis sat 

 magnis, valde curvatis, spatium transverse ellipticum circum- 

 scribentibus, a basi ad apicem gradatim acuminatis. Antonnis 

 medium clytrorum attingentibus, articulo primo brevi, crasso, 

 tertio primo longitudine ajquali, quarto quam tertio paullo 

 breviore, quinto ad undecimum longitudine gradatim crescentibus. 

 Prothoraco transverse, quam capite vix latiore, margine lateral! 

 medio vix coiispicua, antice posticequo sat distincta et dentata, 

 Elytris parallclis, apicibus rotimdatis. rrostcrno dense puiictato, 

 processu intercoxali jHano. Episternis metatlioracis postioe late 

 truucatis. Tibiis anticis mcdiisque spinosis, fcmoribus omnibus 

 subtus dcnticulatis. Segmentis 1° ad 4""" abdominis utriuque 

 profunde fovcatis ; segmento 5" apico subrotundatis. 



This genus is especially characterized by the strongly 

 curved mandibles, destitute of teeth, simple at tip, and 

 enclosing a transversely elliptical space, and by the large 

 deep fovea on each side of each of the first four abdominal 

 segments in the male. The presence of spines on the tibiai 

 and of similar but much smaller spines on the underside of 

 the distal halves of the femora leads me to ])rovisionally place 

 it in the group of tlie ivcmplianides, though 1 believe that less 



