BY A. UAFFKAY. 161 



dorsali arcuata ad angulum suturalem, paulo ante apicern, desi- 

 nenti. Segmento primo dorsali magno, baisi triimpresso et 

 fasciculato, impressione media transversa, carinulisduabus leviter 

 divergentibus quartam partem disci inciudentibus et attingenti- 

 bus. Metasternum totum profunde sulcatum; segmento ultimo 

 ventrali toto late transversim impresso. Pedes mediocres, femo- 

 ribus anticis et intermediis leviter inflatis. g. Long. 1-80 mm. 

 New South Wales. 



Rybaxis electrica, (1) King. 

 Trans. Ent. Soc. N.S.W. i. 1863, p. 48, tab. 16, fig. 9b. 



Oblonga, subdepressa, parallela, castanea vel rufo-castanea, vix 

 perspicue pubescens. Caput latitudine sua longius, antrorsum 

 baud attenuatum, quinquefoveatum. Antennae mediocres, arti- 

 culis duobus primis majoribus, 3-6 subelongatis, 5 jjaulo longiori, 

 7 latitudine sua tantummodo longiori, 8 subtransverso, 9 paulo 

 majori, subtransverso, 10 multo majoi"i, trapezoidali, transverso, 

 11 ovato acuminato, pirecedenti haud latiori. Prothorax capite 

 multo et longitudine sua vix latior, valde cordatus, lateribus 

 medio rotundatis, dein ad apicem angustatus, foveis tribus sub- 

 jequalibus, sulco transverso delicatulo sed conspicuo. Elytra 

 elongata, ad basin leviter attenuata, humeris obliquis et notatis, 

 basi foveis quatuor, stria dorsali arcuata, ad angulum suturalem, 

 paulo ante apicem, desinenti, margine postico leviter sinuato : 

 interdum minutissime punctulata. Segmento 1° dorsali magno, 

 carinulis duabus longis et valde divergentibus, inter se basi 

 quintam partem disci inciudentibus. Metasternum totum pro- 

 funde sulcatum. 



g. Metasternum latius et profundius sulcatum ; trochanteribus 

 intermediis basi dente minuto, recurvo et obtuso armatis. Long. 

 1-30-1 -40 mm. 



Australia (without locality); Swan River, W.A.; Tasmania. 



This species is smaller than the preceding one, the antennae are 

 a little shorter, the pubescence is hardly visible, the prothorax is 

 much more rounded in the middle and more abruptly narrowed 



