XIX 



Exhibitions, dr. 



Mr. Douglas exhibited the following Psyllidfie, taken by himself near 

 Lee, Kent, viz. : — 



Psylla ? On birch trees. Possibly P. Betulfe, Lt«n,, F^o/-. 



„ spartiophila, Forst. On broom bushes. 



ApJialara venosa, Forst. New to the British Fauna ; now first identified 

 as living on Achillea millefolium. 



Pihinocola aceris, Linn, On maple trees [Acer cain]iestns). 

 „ erica, Curtis. On heather. 



The President showed some microscopic slides containing specimens of 

 Diptera, &c., prepared with extraordinary care by Mr. Enock. He also 

 brought for exhibition twigs of horse-chestnut from Oxford, that had been 

 attacked by some kind of larva, which had eaten away the inside of portions 

 of the stem, causing the buds to drop off. He was in doubt whether the 

 mischief had been caused by Zeuzera ^sculi, or by Tortricidse, or wood- 

 boring beetles, but he would be glad to know if the destruction to the 

 trees had been noticed elsewhere. He also exhibited two species of 

 Coccus, one of them on Camellia leaves in his greenhouse, which he 

 had previously described in the ' Gardener's Chronicle,' under the name 

 of C. CamellijB, and which had afterwards been observed by Dr. Ver- 

 loren in his greenhouse in Holland. The female, which is one line in 

 length, discharges a white waxy matter, having the appearance of the 

 excrement of a young bird. The other species had been sent to him by the 

 Rev. T. A. Preston, of Marlborough, on a species of Euphorbia, obtained 

 from Dr. Hooker, of Kew. The leaves were covered with small scales, 

 which, on close examination, were observed to have two small spines 

 attached, and these proved to be the caudal extremities of the males. 

 These insects emerge from the pupa backwards, and in consequence they 

 make their appearance with the wings drawn forwards over the head. 



Mr. Stevens exhibited varieties of some British Geometrse, and what 

 appeared to be a small variety of Lyccena Thetis (Adonis), taken near 

 Croydon. 



Papers read. 



Mr. Baly communicated " Descriptions of a new Genus and of new 

 Species of Halticinae." 



Mr. Peter Cameron communicated " Descriptions of new Genera and 

 Species of Tenthredinidiie and Siricidse, chiefly from the East Indies, in the 

 Collection of the British Museum." 



Kew Part of ' Transactions.'' 

 Part 2 of the ' Transactions' for 1876 was on the table. 



