REVIEWS AND NOTICES OF BOOKS. 251 
was served at 7 p.m., and Messrs. R. Adkin, B. W. Adkin, C. G. 
Barrett, J. T. Carrington, F. J. Hanbury, J. Jager, W. J. Lucas, 
R. McLachlan, R. South, J. W. Tutt, and G. H. Verrall were among 
the guests. Letters of regret were read from the members Dr. P. B. 
Mason and Mr. T. W. Hall for their absence on account of ill-health. 
The host proposed ‘‘ The Entomological Club,’ dwelt on the fact 
that the meetings were to be considered rather social than scientific, 
and trusted that every one present would thoroughly enjoy himself. 
This the guests evidently did, indulging in informal chat and re- 
counting many strange entomological reminiscences. One will 
never be able to estimate the value of these social evenings when 
opponents in discussion and men of entirely different lines of thought 
meet on common ground and forget their differences on the neutral 
plane such meetings afford. 
The Yorkshire Naturalists’ Union held another field meeting on 
August 4th and succeeding days in order to explore Arkengarthdale, 
a part of Swaledale. The headquarters were at Reeth, and at the 
meeting on Monday night, under the presidency of Mr. G. T. Porritt, 
F.L.S., F.E.S., three new members were elected, and reports of the 
work done were read. The wet weather prevented the entomologists 
from doing any very serious work. 
Mr. Green observes (nt. AZo. Mag., August) that the gregarious 
larvee of various species of Centrotus are assiduously attended by ants 
which emit a fluid from an extensile 3-segmented organ at the 
extremity of the body. When the insect is undisturbed, this organ is 
withdrawn into the large conical segment which apparently terminates 
the body, but is extruded immediately upon application by the attendant 
ants. 
Mr. Gerald Strickland states (Ent. Mo. Mag.), that the rubber 
solution supplied for repairing pneumatic tyres is an excellent adhesive 
for fastening antenne, wings, &c., on broken insects. 
Mr. Claude Morley confirms (Hnt. Mo. May., August) the 
Braconid Helcon annulicornis, Nees, as British, having captured a 
@ specimen in Brantham Dale, Suffolk, on July 6th, 1899. 
FREVIEWS AND NOTICES OF BOOKS. 
A Hanpsook oF THE Gnats on MosQuiroEs, GIVING THE ANATOMY 
AND LIFE-HISTORY OF THE CuLicipan, by Major Geo. M. Giles, I.M.S., 
M.B. Lond., F.R.C.S. London: Bale Sons, and Danielson, 1900, 
pp. vili+874.—Good English works on Diptera are not too 
abundant, so that though the present work is intended chiefly for 
the use of those who wish to study gnats in connection with the 
whole subject of the causation and prevention of malaria and filariasis, 
its value to the naturalist is clear and definite. The book gives us 
first a series of chapters on the anatomy, life-history, and classification 
of the Culicidae, extending to 115 pp. The author does not say that 
he gives us here any original material, but we gather in looking through 
it, as well as from a definite statement to that effect, that he has gone 
over and verified the various facts collected from authorities quoted. 
These chapters should be useful not only to the investigator of tropical 
diseases, but to the ordinary entomological student. In the systematic 
