Entomological Society. 6657 



Mr. Westwood exhibited, and read the description of, a new and beautiful species 

 of Phasmidae, for which he proposed the name of Donelytron Batesianum, and to publish 

 a coloured figure in the 'Transactions' of the Society, it having been forwarded by 

 Mr. Bates, from the Amazon River, too late for representation in Mr. Westwood's 

 monograph on the family, published by the Trustees of the British Museum. 



Mr. Westwood also exhibited a fine Papilio, collected in New Caledonia, by Mr. 

 MacGillivray, of which the following are the characters : — 



Papilio (Ulysses, var.) Ulyssinus, Westw. 



Alis nigris dimidio basali caeruleis, corpore et basi alarum viridi irroratis, venulis 

 tribus venae medianae macula holosericea nigra singulatim indutis, incisuris 

 marginalibus albido maculatis ; alis subtus fuscis, luteo-variis striga trans- 

 versa areae discordalis, lutea ; postieis lunulis 6-maculaque anali luteis, squa- 

 mis caeruleis supra marginatis. Expans. alar. unc. 3f. 



Mr. Westwood, in describing this insect, called attention to the state of the 

 question as to the views of the modification of species entertained by different recent 

 writers, and observed that it appeared to him to afford an additional proof of the fact 

 that, whilst many species of insects seemed to be free, under any changes of time or 

 place, from more than occasional and slight individual variation, other insects evi- 

 dently exhibited decided modifications of higher than individual character, wherever 

 they existed in distinct localities. Of the former of these kinds of species he quoted 

 Cynthia Cardui, which maintained its pure specific character almost all over the 

 world (to which Mr. Douglas added Deiopeia pulchella) ; whilst of the other kind 

 Papilio Paris, and apparently P. Priamus (to which P. Ulysses might now be added), 

 might be cited. Hence Mr. Westwood considered that the fine Papilio exhibited 

 that evening was another local variety of P. Ulysses ; and he suggested for it the sub- 

 specific name of " Ulyssodes." He added that in the British Museum collection is 

 another geogra pineal sub-species, also from New Caledonia, in which the male has 

 scarcely any trace of the silky patches on the fore-wings, although agreeing in size 

 with Ulyssinus. For this he proposed the name of P. (Ulysses) Ulyssellus. This 

 diversity in the modificational powers of certain species had, he believed, not been 

 sufficiently noticed in treating upon the question of the modification of species. He 

 considered it would be advisable, however, to give to each decided geographical modi- 

 fication of a species a separate specific or sub-specific name. 



Mr. Waterhouse admitted the existence of decided and well-marked geographical 

 races amongst certain insects, citing certain species of Philippine Pachyrhynchus. 

 He had not, however, deemed it necessary to give to these races distinct names. He 

 also noticed the fact that whilst certain species seemed never to vary (Coccinella 

 7-punctata for example), other species in the same genus were so variable, in the 

 same locality, that it was scarcely possible to obtain two specimens alike. 



Mr. Westwood also observed that he was not sure whether the grand new Orni- 

 thoptera, for which Mr. Wallace proposed the name of" Croesus," might not be a local 

 variety of O. Priamus. 



Mr. Pascoe stated, with reference to his papers on the Longicorn Coleoptera, 

 published in the ' Transactions' of the Society, that he had ascertained his genus 

 Blemmya was identical with Euryarthrium, Blanch , and that Anomoesia was refer- 

 able to Eunidia, Erich., which is also the P>ethis of Dejean. His names therefore, 



xvir. 2 y 



