16S tJ'^y- 



leaf-stalks of AHsma, and described the mode of oviposition as observed by himself 

 in both of these genera. Likewise, a living example of the remarkable aquatic 

 Hymenopteron — Prestwichia aquatica, Lubb., and said it was one of a brood of 

 nine, including 8 ? ? and 1 $ , that issued on May Ist from a single egg of 

 Colymbetes found on September 5th, 1898. Mr. Merrifield, some specimens of 

 Hemaris bombyliformis, Esp., with the scales still covering the central portions of 

 the wings. He said these scales, which are present immediately after the emergence 

 of the insect but soon become detached, may be rendered adherent by allowing a 

 very weak solution of indiarubber in benzoline to run over the wings. Mr. C. H. 

 Dolby-Tyler communicated a paper on " The development of Ceroplastes roseatus, 

 Towns, and Ckll." 



June 7ih, 1899. — Mr. G. H. Verhall, President, in the Chair. 



Mr. Edgar Greenwood, of Frith Knowl, Elstree, Herts, was elected a Fellow of 

 the Society. 



Mr. J. J. Walker exhibited, on behalf of Mr. G. F. Mathew, R.N., a number 

 of interesting Lepidoptera, chiefly from the Mediterranean region, and including 

 amongst others the following : examples of Thais polyxena, Schiff., var. ochracea, 

 Staud., having an unusually deep and rich colour, bred from larvie found at Platsea, 

 Greece; male and female of Thestor ballus, Hb., from Alexandria, taken on Jan. 

 23rd, 1898, the male remarkable in being largely marked with orange on the upper- 

 side of the front wings ; unusually large specimens of LyccBna Baton, Berg., from 

 Vigo, N. Spain ; and a singular aberration, from Corfu, of MelitcBa Didyma, Ochs., 

 with central band of black spots very strongly marked on both wings, the other 

 spots being obsolete and the ground colour pale fulvous. Colonel Yerbury, the 

 pupa-case of a Hymenopterous insect which appeared to be parasitic in the weevil 

 Barynotus moerens, Fab. Dr. Chapman showed a large Ant-Lion larva from Cannes, 

 probably that of Acanthaclisis occitanica ; it was one of those which do not make 

 pit-falls. Mr. E. E. Green exhibited a teratomorphic specimen of a Zygsenid moth, 

 Chalcosia nenosa, Walk., which he had found at rest on a leaf, at Udagama, Ceylon, 

 in October, 1898. In this specimen four wings were present on the left side, the 

 hindmost being almost as fully developed as the normal hind-wing on the right side, 

 while the other three appeared to be attached to the mesothorax. He also showed 

 larvee and pupae of insects in air-tight glass tubes, in which a little cotton wool, 

 sprinkled with formalin, had been placed. The specimens, which had been thus 

 preserved for nearly two years, had lost little of their original colour or brilliancy. 

 Mr. Gahan, pupa-cases of a Longicorn beetle, Plocederus obesus, Gah., which were 

 remarkable in being composed almost wholly of carbonate of lime. It was not 

 known how the pupa-cases were fabricated, but presumably the larvse must possess 

 lime-secreting glands. Mr. R. McLachlan, F.R.S., read a paper on " A second 

 Asiatic species of Corydalis," and exhibited the male type of the species described, 

 "which he proposed to name Corydalis orientalis. He said the first Asiatic species 

 of Corydalis was described and figured by Prof. Wood-Mason in 1884, the genus up 

 to that time having been considered to be peculiarly American. Mr. H. J. Elwes, 

 F.R.S., communicated a paper " On the Lepidoptera of the Altai Mountains ;" and 

 the Rev. A. E. Eaton a paper, entitled, " An Annotated List of the EphemeridcB of 

 New Zealand."— J. J. Walker and C. J. Gahan, Hon. Sees. 



