OCR Text |
Show 1880.] PROF. WESTWOOD ON THE GENUS PERGA. 363 a very strong texture ; and the perfect insect appears in the following March. From the accompanying figures the larvae have the body gradually attenuated behind, terminating in a sharp point, which they seem to use as a prehensile organ. On the edge of the leaf inhabited 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 larvaa. 2. PERGA KLUGII, sp. nov. (Plate XXXIV. figs. 1, 2.) P. politae (Leach) affinis, fulvo castanea, mesonoti medio absque macula flava, scutello flavo vix longitudinaliter impresso. Mas. Clypeo recte transverso; labro, tuberculis antenniferis an-tennisquefulvis; vertice vix longitudinaliter impresso, prominentiis duabus in medio parum distinctioribus; antennis ultra oculos extensis, articulis tribus intermediis gracilibus fere cequalibus; thorace magna, collaris lobis pallide fiavis vage punctatis ; meso-noto punctatissimo, linea tenui media antice impressa, lateribus parallelis, a scuto mesonoti haud distincte separatis; scutello magno, piano, nitido, impunctato, fulvo, transverso-ovali, tuberculis duobus posticis distantibus, impressione media longitudinali vix distincta, margineque postico parum elevato ; meso- et metapleuris rude punctatis, macula parva Jtavida notatis; abdomine totofulvo-castaneo subnitido; corpore infra cum coxis et pedibus concoloribus, tibiis tarsisque pallidioribus, femoribus et apice tibiarum posticarum interdum obscurioribus; alis hyalinis, parum ful-vescentibus, venis stigmateque fulvis, cellula prima submarginali parva, secundapaullo majore pentagonali, tertia magnitudine prce-cedentibus simul sumptis cequali, apice valde obtiquo et curvato. Fcemina differt vertice magis distincte longitudinaliter impresso. Long. corp. S Un. 9, 2 ^n- 10-11. Expans. alar, antic. 8 Un. 18, 2 Un. 18-23. Hab. in Australasia (Albany &c). In Mus. Hopeiano, &c. 3. PERGA POLITA. Perga polita, Leach, Zool. Misc. iii. p. 115. P. brunneo-violascens, polita, nitens; thorace ferruginea ; disco maculis, squamis, pleuris, scutello, capite, antennis, coxis, tibiis, fiavis .femoribus ventreque subviolascenti-f errugineis politis, stigmatibus postice albido notatis, alis fulvescentibus ; ptery-gosteis, margine stigmateque ferrugineis; mandibulce saturate fer-ruginece latere inferiore apiceque nigris ; scutellum postice ferruginea- brunncum. Species magna, scutello fortiter canaliculato (charactere Leachio neglecto), alisque anticis pone stigma nonnihil saturatioribusfacil-lime distinguenda. Long, maris f une. Expans. alar, antic. \\ une. Hab. in Terra Van Diemeni ; Australia (e Dom. Macleaio accepta), Hunter's River ; Melbourne (Bakewell) ; Moreton Bay, and Gold Diggings. In Mus. Bop. Oxoniae. |