354 Entomological Society. 



ciatus on palings at Camberwell, but that none were found on adja- 

 cent palings which had been kyanized. 

 The following papers were read : — 



" Descriptions of two new genera of Carabida." By J. O. West- 

 wood. 



Helluodes, Westw. Genus novum Helluoni proximum, habitu 

 vero Morionis cum trophis Anthiarum. Caput maximum (pro- 

 thorace multb majus) ; mandibula porrecta, acuta, intus inermes ; 

 maxilla elongated, apice subunguiculata ; palpi interni valde cur- 

 vati ; externi maxillis vix duplb longiores ; mentum in medio valde 

 emarginatum ; labium angustum, elongatum ; palpi labiates arti- 

 culo ultimo pracedente multb minori ; prothorax truncato-corda- 

 tus, marginatus ; elytra depressa ; pedes mediocres ; tibiis anticis 

 intus ante apicem emarginatis ; tarsorum articulo 4to simplici. 

 Helluodes Taprobanse, Westw. Niger nitidus, labro femoribus 

 apiceque abdominis piceo-rufis. Long. corp. lin. 15. — Hab. in 

 Insula Taprobanse. In Mus. D. Melly. 

 Platynoues, Westw. ■ Genus (vel potius subgenus) novum Mo- 

 rioni proximum. Corpus magnum, latiusculum, depressum ; caput 

 magnum, planum, lavissimum, antice bi-impressum, clypeo emargi- 

 nato ; labrum parvum, quadratum, antice valde emarginatum ; 

 mandibula magna, intus versus medium obtuse dentata ; maxilla 

 et instrumenta labialia ut in Morione orientali; antenna breves, 

 compressa, articulis apicalibus parce setosis ; pronotum capite 

 brevius, longitudine latius ; cordato-truncatum marginatum, stria 

 tenui media impressa impressionibusque duabus ad angulos pos- 

 ticos ; elytra lata, depressa, lavia, striis paucis tenuibus impressa, 

 costaque tenui ex humeris fere ad apicem ducta ; pedes mediocres ; 

 tarsis brevibus, ut in Morione. 

 Platynodes Westermanni, Westw. Niger lavis subnitidus, capite 

 nitidissimo ; labro et antennis piceis ; elytris striis tenuissimis 

 aqualibus, serieque punctorum intra margines laterales instructis. 

 Long. corp. lin. 12 (mandibulis exclus.). — Hab. in Guinea. 

 Mus. Westw. A Dom. Westermanno communicatus. 

 An extract from a letter from Captain Boys addressed to Mr. 

 Westwood, containing notes on the habits of the genera Dorylus, 

 Ascalaphus, &c. was also read. 



"Dorylus," he states, "is certainly more closely allied to Formica 

 than to Mutilla, as far as the little experience I have had holds good." 

 In a house in which Captain Boys resided at Gorruckpore, " a nest 

 of these insects was located ; and one evening they swarmed to such 

 an extent as to become a perfect nuisance. A small orifice was dis- 

 covered in the flooring (brick and earth plastered) immediately 

 beneath the dining- table, from which hundreds were escaping. Those 

 with wings after moving about a few seconds took flight ; the apte- 

 rous ones (which were no bigger than a common house-fly, or 

 smaller), and to me appearing true ants, remained swarming, and 

 entering in and out in the same manner as ants on a sunny day. 

 This was at night. I collected a host of both kinds : I can therefore 

 say positively that they live in society, excavate nests in the earth, 

 and to the best of my belief are divided into neuters and workers." 



