BY THOMAS n. SLOANE. 467 



basal angles, depressed ; basal area shagreened and minutely 

 punctate. Elytra wide(9-8 x 7min.), convex; apical curve hardly 

 sinuate on each side; interstices lightly convex, third unipunc- 

 tate before basal declivity; basal border with posterior margin 

 straight beyond fourth stria, raised but not angulate at humeral 

 angle. Posterior trochanters reniform, external side arcuate, 

 apex obtusely rounded. Length, 15-17; breadth, 6-7 mm. 



Ilab.— Q.: Gulf of Carpentaria (type); Winton District. Four 

 specimens ((J9) were given to me by Mr. C. French. Type in 

 Coll. Sloane. 



Allied to Ph. nnytsi Cast., from which it difiers by form more 

 robust and convex ; prothorax longer proportionately to its 

 breadth, more strongly narrowed to base (which is evidently 

 narrower than apex); elytra more convex, more declivous to 

 sides and apex, more strongly striate, humeral angles less sharply 

 marked; mandibles with outer side evenly arcuate, right mandible 

 especially with the anterior, external bend far less marked ; 

 anterior tibiae wide at apex, but not w4th external apical angle 

 produced into a long spur-like process, outer edge not with 

 several well marked denticles above apex. 



Phorticosomus gularis, n.sp. 



^. Subparallel, rather depressed. Head large, left mandible 

 elongate, and strongly hooked at apex; labrum deeply trian- 

 gularly excised ; suhtnentum. bicornute; prothorax transverse, 

 anterior angles prominent, basal angles rectangular ; elytra 

 strongly striate, humeral angles marked; prosternum setigero- 

 punctate before coxae; ventral segments 3-5 punctate along ante- 

 rior and posterior margins. Piceous-brown. 



Head large (4-5 ram. across eyes), convex and minutely punc- 

 tate posteriorly; front depressed, a wide irregular fovea on each 

 side; a carinate ridge above each eye; a transverse impression 

 on each side behind eyes; depressed frontal part well defined by 

 a rounded, oblique ridge, extending from inner side of postocular 

 impressions to outer angle of clypeus. Horns of submentum 

 separated, but united at bases to fill all the space between pos- 



