592 STUDIES IN AUSTRALIAN ENTOMOLOGY, XVI., 



The position of this species in the genus liotonomus is next 

 N. sydneyensis SL, from which it differs by colour wholly black, 

 without metallic reflections; head larger; prothorax shorter, more 

 rounded on sides and at posterior angles. It also lias some 

 affinity to N. scotti SI., but is very distinct, some conspicuous 

 differences being its smaller size; larger head; prothorax shorter, 

 more strongly rounded on sides and at basal angles, lateral border 

 wider; elytra less convex, more deeply striate; basal and lateral 

 borders much more strongly raised at point of junction. It was ' 

 discovered by \)v. E. W. Ferguson, about two miles east from the 

 Lindfield Railway Station (seven miles from Sydney on the North 

 Shore Railway) where I have also taken it. 



Genus CiiLiENioiDius. 



Chl^nioidius interstitialis, n sp. 



Elliptical oval, subdepressed; prothorax subquadrate, sides 

 lightly sinuate posteriorly, basal angles rectangular, with summit 

 obtuse; elytra crenulate-striate, interstices convex, first with 

 striole at base, third impunctate; intercoxal part of prosternum 

 not bordered. Brown. 



Head convex (3 mm. across e3'es), minutely punctulate; two 

 short light impressions between bases of antennae; eyes convex, 

 inclosed behind. Prothorax broader than long(3-4 x 4-5 mm.), 

 depressed, much wider at base(4'25 mm.) than at apex(3-2 mm.); 

 minutely punctulate (punctulation stronger in lateral basal im- 

 pressions); sides lightly aicuate on anterior three-fourths, meet- 

 ing base at right angles; anterior margin hardly emai'ginate; 

 anterior angles not marked; base truncate on each side, lightly 

 emargiuate in middle; border wide on sides, extending along l)ase 

 on each side, narrow and entire on anterior margin; median line 

 finely impressed on disc; lateral basal impressions wide, shallow; 

 posterior marginal seta at basal angle (in the angle of the border). 

 Elytra wider than prothorax(9-7 x 6-25 mm.); striaj strongly im- 

 pressed, creuulate; interstices convex, minutely punctate, ninth 

 narrow, finely rugulose, seriate-punctate; apical curve sinuate on 

 each side; marginal channel wide; lateral border lightU' reflexed. 



