140 THK CARABIDAE OF TASIIAXIA. 



P E R C D E R II r S, gen. nov. 



Head small; froutal impressions obsolete; two supra-orbital setae ou each 

 side; eyes hemispherical, hardh- inclosed at base, distant from buccal fissure be- 

 neath. Labrum truncate, G-setose. Clypeus with a seta on eaeli side. Man- 

 dibles with a seta in scrobe of outer side. Palpi stout : maxillary with penulti- 

 mate joint obconic, setose; apical joint stout, short, obtusely pointed, glabious; 

 labial short; penultimate joint bisetose; apical joint short, stout, obtusely pointed. 

 Antennae long, slender; second and third joints setulose. Prothorax depressed, 

 subquadrate, wider across base than apex, lightly and roundly ampliate at widest 

 part, bi-impressed on each side of base; basal angles rectangular, obtuse at sum- 

 mit ; border nan-ow, passing round basal angles ; submarginal basal carina not 

 developed; jjosterior marginal seta wanting. Elytra rather depressed: base bor- 

 dered; humeral angles marked, not dentate; striae lightly marked on disc, obso- 

 lete on sides; first interstice with a very short striole at base, third 4-])unctate 

 fceside third stria, eighth cariuate at apex, obsolete in middle. c?. — Anterior tarei 

 with two basal joints lightly dilatate and squamose beneath. 



The position of this genus is near Pterocyrtus, but it differs by f(irm more 

 depressed ; head with froutal impressions obsolete, two supra-orbital setae on each 

 side; prothorax without a submarginal basal carina, seta at ba.sal angles wanting. 

 The genotype is a small, jet-black, rather nitid beetle. 



Percodkrjius xiiiKii, sp. nov. 



Elli|)tieal-oval, sulidepressed. Black, nitid ; legs and antennae piceous or 

 piceous red, femora darker than tibiae, base of antennae reddi.sh. Head short (1.3 

 mm. across eyes); front wide; eyes large, round, prominent. Prothorax sub- 

 quadrate (1.5 X 2 mm.), widest just before middle, depressed: apex narrow 

 (1.2 mm.), angles not prominent, rounded; sides arcuate anteriorly, subsiimate 

 to liase; base wide (1.7 mm.), tnincate, angles rectangular, summit obtuse: l)order 

 narrow, passing round Ijoth anterior and basal angles, very narrow in middle of 

 apex, obsolete in middle of ba.se; basal impressions shallow, inner one well 

 marked, outer one short, distinct; space between these imjiressions wide, depressed. 

 Elytra with disc lightly striate; sides smooth; third interstice 4-punctat<.', eighth 

 carinate at apex, obsolete in middle; a short striole at base of first interstice. 

 Tarsi seto.se on ujiper surface; basal joint of posterior tarsi as long as three suc- 

 ceeding joints together. Lengfli, 6, breadth, 2.3 mm. 



Hab. — Great Lake (Simsonl. Three specimens. 



P T E r (I c v R T r s. gen. nov. 



Head bi-impressed: impressions not di\ergeiit posteriorly: one sa)>ra-orl)itaI 

 seta on each side; eyes distant from buccal tissure beneath. L:ibrum truncate, 

 fi-setose. Mandibles with a seta in scrobe of outer side. Mentum with sinus 

 moderately deep, oblicjiic on sides; a wide prominent median tootii. Ligula cor- 

 neous, narrow, rounded at apex, bisetose in middle of ajiex: [laragiossae narrow, 

 free, hardly extending beyond ligula. Palpi stout; labial sliort; penultimate 

 joint 2-setose in front, ai>ical joint comjirt-ssed, rather wide behind middle; ni.ixil- 

 lary with two apical joints short, wide at point of union: penultimate joint 

 obconic, narrow at base, .setose; apical joint angustate, obtuse at apex. Maxillae 

 hooked, sparsely setose on inner side, outer lobe biarticulate. Antennae slender, 

 not long: joints short, second and third about eiiual (third Iiardly longer than 



