XX1X 
Dielocerus Ellisii of Curtis, a sawfly which is social in all its stages, as described 
by Curtis, whose account of its economy was corroborated by Mr. Peckolt ; but the most 
interesting object in the collection was the female of the stingless honey-bee Trigona, 
which has been hitherto a desideratum with Hymenopterists. Amongst some hundreds 
of specimens of Trigona Mosquito were a few workers and females, and of the latter 
half a dozen examples; there was no difficulty in discovering the queen, which, when 
her abdomen was distended with eggs, was more than double the length of a worker, 
and had very much the appearance of a gravid female Termes. The collection also 
included Cryptocerus elongatus, which was said to be destructive to nests of the 
mosquito bee (Mr. Bates has described another species of Cryptocerus as feeding on 
the dung of birds); and a white ant, very destructive to coffee ‘beans, closely 
resembling, if not identical with, the Termes cumulans of Hagen. 
Mr. Roland Trimen, of Cape Town, communicated a paper entitled “ Notes on the 
Butterflies of Mauritius.” Of the twenty species of Rhopalocera (exclusive of the 
doubtful native, Thymele Ramanatek) enumerated by Boisduval in bis “ Faune 
Entomologique de Madagascar, Bourbon et Manrice” as inhabiting the last-mentioned 
island, the author himself, during a visit of three weeks in July, 1865, captured 
sixteen, and was presented by other collectors with the remaining four; in addition to 
which he captured four species, and was presented with another not known to 
Boisduval as Mauritian. The five additional species were Callidryas Florella, Fabr., 
C. Rhadia, Boisd., Terias Rahel, Fabr.. Junonia Rhadama, Boisd, and Libythea 
Cinyras, n. sp. ? 
Future Meetings of the Society. 
The President announced that there would not be any Meeting of the Society in 
October, and that the future Meetings would, by permission, be held in the Rooms of 
the Linnean Society, in Burlington House, Piccadilly. 
November 5, 1866. 
Sir Joun Lussock, Bart., President, in the chair. 
The Meeting was this day for the first time held in Burlington Heuse. A resolu- 
tion in the following terms was proposed by the President, seconded by Mr. Alfred 
R. Wallace, and carried by general consent :— 
“That the Society desires to record its sense of the liberality and kindly feeling of 
the Linnean Society evinced by the permission given to assemble in these Rooms, and 
that the thanks of the Society be offered to the Linnean Society accordingly.” 
Notice of Subjects for Discussion. 
The President referred to the suggestions made by the Council twelve months 
previously (see ‘ Proceedings,’ 1865, p. 128), as to giving notice beforehand of papers 
intended to be read or subjects to be introduced for discussion. In no single instance 
had notice been given; but the Council was so convinced that the interest and 
scientific value of the Meetings would be increased by the adoption of such a course, 
that he had been requested again to mention this matter from the Chair. If the 
