BY THOMAS 0. SLOANE. ' 141 



second); joints 4 — 10 oval, monilifonu, e(|ual; basal joint only glabrous. Pro- 

 tliorax broader than long; two short impressions on each side of base; border 

 narrow, terminating at basal angles; two marginal setae on each side, posterior 

 seta at basal angle. Elytra convex; base not bordered; humeral angles marked; 

 lateral channel terminating at humeral angle; margin interrupted posteriorly and 

 with an internal plica; eighth interstice carinate at apex, an apical striole along 

 inner side of carina. Metepisterna short; metepiraera narrow, not distinct. 

 ^'entral segments corneous, tirst narrowly dividing posterior coxae; segments 

 3 — G with an ambulatorial seta on each side near middle; apical segment in d 

 unisetose, in ? bisetose on each side. Tarsi with a few setae on upper surface; 

 <?. — Anterior short; two basal joints triangular, a little dilatate, triangularly pro- 

 duced at inner apical angle, squamose on lower side.' Genotype, P. globosus 

 Sloane. 



I am not sure whether the New Zealand species whicli are now referred to 

 Oopteriis are actually congeneric with Ptcrnci/rtus, but they are certainly very 

 closely allied. 



Table of Species. 



1 (6) Eyes convex, prominent: elytra strongly convex on disc. 



2 (5) Prothorax widest before middle; sides lightly sinuate near base; a 



prominent, narrow, submarginal ridge at base. 



3 (4) Size major. Elytra decidedly striate on disc. Length, .5--5.5 mm. 



striatiilus SI. 



4 (3) Size miner- Elytra smooth. Length, 3.3 — 4 mm. .. tasiuanicus Cast. 



5 (21 Prothorax widest at middle: sides obliquely njaitrowed to base (base 



wide); submarginal basal ridge short, wide, lightly raissd. Length, 

 4.3-5 mm globosus %\. 



6 (1) Eyes small, round, not prominent: elytra not strongly convex on disc. 



(Colour reddish, elytra strongly striate on disc). Length, 4 mm. 



rubescens SI. 



PTEROCyRTUS STBIATULUS, Sp. noV. 



Apterous, oval, robust, convex; head wide, front with tw^o elongate, rather 

 irregular, parallel depressions; prothorax subquadrate, wider across base (1.4 

 mm.) than apex (1.1 mm.), a submarginal carina on each side of base; elytra 

 oval, convex, punctate-striate on disc, striae 5 — 7 faint. Black, with a narrow 

 reddish margin at apex; legs and antennae pieeous red. 



Head large (1.15 mm. across eyes); frontal impressions parallel, not out- 

 turned posteriorly; one supra-orbital seta on each side behind the convex lateral 

 space; ej'es convex, rather prominent. Prothorax broader than long (1.3 >< 1.7 

 mm.), widest before middle, strongly angustate to apex, obliquely narrowed to 

 base; sides subsinuate just before ba.se; basal angles rectangiilar ; basal foveae 

 deep, bi-impressed ; base truncate, slojting slightly forward on each side; sub- 

 marginal carina narrow, well developed ; lateral channel narrow and deep towards 

 base ; a seta in channel at basal angle ; border narrow, reflexed. Elytra much 

 wider than prothorax ( 3 . .5 X 2.7 mm. ) . strongly rounded on sides ; humei'al 

 angles prominent, shortly subdentiform ; basal border obsolete, but closing lateral 

 channel at humeral angles; scutellar striole wanting; four inner striae well marked 

 im disc, weaker on apical declivity, eighth strongly impressed; interstices a little 

 convex on disc, third finely 3-puiictate beside third stria, eighth carinate tow ards 

 apex, ninth narrow, depressed. Length, 5 — 5.5, breadth, 2.4 — 2.7 mm. 



