119 



and extending to the Mediterranean coast, but almost absent 

 from Australia, The descriptions are drawn up from numerous 

 specimens. 



OxiscosoMA CASTAXEA, Brunnev (Syst., 300, fig. 36). 



Diploptera silpha, Sauss., Rev. ZooL, XVI., 325 ; Zetohora 

 granicollis, Saussure, Melb. Orth., 33, fig. 21, 1862 ; Laxta 

 oniscoides, Walker, Brit. Mus. Cat., 18. 



JIale. — Dull chestnut or coffee-brown. Head of male blackish- 

 brown or black, shining ; antennae brown ; labrum, palpi, and 

 space at base of antennae yellowish, also the legs and most of the 

 underside. Pronotum of male rounded in front, widest in the 

 middle and angular ; foremargin broadly dull-yellowish, with a 

 few dark granulations ; sides gradually narrowed to the hind- 

 angles ; disk blackish in the middle, sides chestnut, densely 

 granular, with two converging furrows in front, enclosed space 

 raised over the head ; quadrilateral area beyond widest behind 

 at the hindmargin. Elytra large, rounded at the apex, veins 

 much raised, irregularly reticulate radial vein black near the 

 base. Wings slightly shorter, border deeply emarginate in the 

 middle, smoky tinted. Scutellum triangular. Abdomen elong- 

 ated, brownish testaceous, lateral margin narrow, angles obtuse, 

 slightly produced. Supra-anal lamina short, transverse, rounded. 

 Cerci much longer, slender, subterete, acute, hairy. Subgenital 

 lamina subquadrate, shining, exceeding the supra-anal, unsym- 

 mef7ncal, the right side deeply emarginate, bordered pale, the 

 left side not ; hindmargin rounded, much reflexed ; styles very 

 slender, setaceous. 



Female.— Br o?id\y oval, outline regular, almost contiguous all 

 round, reddish-chestnut, with numerous, much darker granula- 

 tions, margins and indistinct longitudinal stripes pale ; stigmatic 

 spots, large, black. Head same as male. Pronotum nearly 

 semicircular, hindmargin nearly straight, in the middle slightly 

 and angularly produced, lateral angles obtuse. Lateral margin 

 all round laminar, very broad, hindangles broadly and triangu- 

 larly produced, very acute behind. Supra-anal lamina fiat, very 

 large, keeled, hindmargin rounded, entire. Cerci broad, acum- 

 inate, inserted in a narrow space between the produced hind- 

 angles of preceding segment and the lamina, not exceeding 

 either. Last ventral segment shorter, very broad, subtrigonal, 

 sides sinuate, apex broadly rounded. 



Male. Female. Larva?. 



Length of body ... 22 mm. 24 -26 mm. 8-18 mm. 



Length of elytra... 22-24 " — — 



Length of pronotum 5-6-3" 6 -7-3 " 2-5 " 



Width of pronotum 9-10 " 11-5-12-5 " 4-10 " 



