123 
chester; plums and other fruit were rotting on the ground, and were consumed by 
earwigs, bees, &c., but not a single wasp. 
The President remarked that swarms of black flies (an Aphis) were commonly 
regarded in France and Spain as precursors of cholera. 
Prof. Westwood observed that, if wasps had been absent, all the common species of 
domestic flies had been unusually abundant, and so far from exhibiting any depressed 
vitality, had been excessively active and troublesome. 
Papers read. 
Mr. F. Walker communicated a paper entitled “* Characters of a new Genus and 
Species of Chalcidites ;” the insect in question was from Northern Australia, and bore 
a striking resemblance to some of the ant-tribe; it was described under the name of 
Myrmecopsis nigricans. 
Mr. M‘Lachlan read descriptions of some new British Trichoptera, supplementary 
to, and intended to be incorporated with, his Monograph of the British Caddis-flies. 
Mr. M‘Lachlan also read a paper entitled ‘‘ Descriptions of new or little-known 
Genera and Species of Exotic Trichoptera; with Observations on certain Species 
described by Mr. F. Walker.” The greater part of the species described were collected 
by Mr. A. R. Wallace in the Malayan Archipelago; others were from India, Australia 
and New Zealand. The new species were seventeen in number, the new genera 
nine. 
New Part of ‘ Transactions. 
Trans. Ent. Soc., Third Series, Vol. ii. Part 5, being the fourth Part published 
during 1865, was on the table. 
November 6, 1865. 
F. P. Pascor, Esq., President, in the Chair. 
Additions to the Library. 
The following donations were announced, and thanks voted to the donors:— 
‘Philichthys xiphie, S¢p., monographisk fremstillet af V. Bergsoe ;’ presented by the 
Author, ‘Nye Oplysninger om Philichthys xiphiw, Sip., af J. Steenstrup ;’ by the 
Author. ‘Synopsis of the Bombycide of the United States, by A. S. Packard, jun. ; 
by the Author. ‘ Materials for a Monograph of the North-American Orthoptera, by 
Samuel H. Scudder; by the Author. ‘ Reports on the noxious, beneficial and other 
Insects of the State of New York, by Asa Fitch, M.D., Reports 3—9, 1859-65; by 
the Author. ‘The British Hemiptera, Vol. i. (Hemiptera-Heteroptera), by J. W. 
Douglas and J. Scott; by J. W. Dunning. ‘ Memoires pour servir a l’Histoire 
Naturelle du Mexique, des Antilles, et des Etats-unis,’ 1Ve Livraison (Orthopteres, 
Blattides) ; by the Author, Mons. H. de Saussure. ‘ Blattaruam novarum Species 
aliquot, conscripsit H. de Saussure’; by the Author. ‘The Zoologist’ for November ; 
by the Editor. ‘The Entomologist,’ No. 21 ; by the Editor. 
The addition, by purchase, of the 129th livr. of Duval, Fairmaire et Migneaux, 
‘Genera des Coléoptéres d’Europe, was also announced, 
