18S0.] PROF. WESTWOOD ON THE GENUS PERGA. 363 



a very strong texture ; and the perfect insect appears in the fol- 

 lowing March. 



From the accompanying figures the larvae have the body gradu- 

 ally attenuated behind, terminating in a sharp point, which they 

 seem to use as a prehensile organ. On the edge of the leaf inha- 

 bited by the larvae are represented several oval black objects emitting 

 white bristles, which are not described in the memoir, and which 

 may possibly be intended for excrement or cast skins of the larvae. 



2. Perga klugii, sp. uov. (Plate XXXIV. figs. 1, 2.) 



P. politae {Leach) ajftnis, fulvo castanea, mesonoti medio absque 

 macula flava, scutello Jlavo vix longituduialiter impresso. 



Mas. Clypeo rede transversa ; labro, tubercuUs anteniiiferis an- 

 tennisqitefulois; vertice v'lx longitudinaliter ijiipresso, proinine/itiis 

 duabus ill medio parum distinctioribus ; antennis ultra oculos 

 extensis, articulis tribus intermediis gracilibus fere cequalibus ; 

 thorace magna, collaris lobis pallida jlauis vage punctatis ; meso- 

 noto punclalissimo, linea tenui media antice impressa, lateribus 

 parallelis, a scuta mesonoti haud distinct e separatis; scutello magna, 

 piano, nilido, impunctato, fulvo, transverso-ovali, tubercuUs 

 duabus posticis distantibus, impressione media longiludinali vix 

 distincta, margineque poslico parum elevato ; mesa- et metapleuris 

 rude punctatis, macula parvaflavida notatis ; abJomine totofulvo- 

 castaneo subnitido ; car pore infra cum coxis et pedibus concalari- 

 bus, tibiis tarsisque pallidioribus, femoribus et apice tibiarum 2 

 posticarum interdum obscurioriius ; alis hyalinis, parum ful- 

 vcscentibus, venis siigmateque fulvis, cellula prima submarginali 

 parva, secunda paullo majore pentagonali, tertia magnitudine prce- 

 cedentibus siinul suwplis cequali, apice valde obliquo et cui'vato. 



FcEmina differ t vertice mar/is distincle longitudinaliter impresso. 



Long. carp, c? Un. 9, 5 lin. 10-11. Expans. alar, antic. S Hi. 

 18, 2 lin. 18-23. 



ITab. in Australasia (Albany &c.). In Mus. Hopeiano, &c. 



3. Perga polita. 



Perga polita. Leach, Zool. Misc. iii. p. 115. 



P. brunneo-violuscens, polita, nit ens ; thorace ferrugineo ; disco ma- 

 culis, squamis, pleuris, scutello, capite, antennis, coxis, tibiis, tar- 

 sisquejiavis.femoribusventrequesubviolascenti-ferrugineispolitis, 

 stigmatibus poslice albido notatis, alis fulvescentibus ; ptery- 

 gosteis, margins stigmateque ferrugineis; mandibulce saturate fer- 

 ruginecB latere interiore apiceque nigris ; scutellum postice fer- 

 rug ineo - brunneum . 



Species magna, scutello forliter canaliculato (ckaractere Leachio 

 neglecto), alisque anticis pone stigma nonnihil saturatioribusfacil- 

 lime dislinguenda. 



Long, maris # unc. Expans. alar, antic. \\ unc. 



Hub. in Terra Van Diemeni ; Australia (e Dom. Macleaio accepta), 

 Hunter's River ; Melbourne {Bakewell) ; Moreton Bay, and Gold 

 Diggings. In Mus. Elop. Oxonise. 



