REVIEW. 275 
extending over a dozen years, that the fungus of the house-fly, 
common mould, the yeast fungus, and a fourth small water fungus 
are all forms or developments of one and the same species. The 
presence of fatal epizootics amongst certain insects is well known 
to all entomologists, but whether their communication and action 
can be readily controlled we must leave to positive proof. So 
simple a remedy is well worthy of a trial on any attack of Aphides, 
gooseberry grub (Nematus ribesiv), which has been so destructive 
this year, gregarious lepidopterous larve, or other easily come-at- 
able pests.—Epwarp A. Fircu. 
Prize Essays.—Not only will our scientific, but also 
our sporting, readers hear with satisfaction that Lord 
Walsingham in conjunction with other gentlemen has offered 
prizes for the most complete life-histories of Sclerostoma 
syngamus and Strongylus pergracilis. The following are the 
particulars :—“ £50 for the best and most complete life-history 
of Sclerostoma syngamus, Dies., supposed to produce the 
so-called “‘gapes” in poultry, game, and other birds; £50 for 
the best and most complete life-history of Strongylus pergracilis, 
Cob., supposed to cause the grouse disease. No life-history will 
be considered satisfactory unless the different stages of develop- 
ment are observed and recorded. The competition is open to 
naturalists of all nationalities. The same observer may compete 
for both prizes. Essays in English, French, or German, to be 
sent in on or before October 15th, 1882, addressed to the 
Secretary of the Entomological Society, 11, Chandos Street, 
Cavendish Square, W.”—Ep. 
REVIEW. 
Scientific Lectures. By Sir Joun Lupszock, Bart., M.P., &c. 
188 pp., demy 8vo. London: Macmillan & Co. 1879. 
In his preface Sir John Lubbock apologises that this book 
“does not contain anything new to those who have specially 
studied the parts of science with which it deals;” but he very 
properly adds that he hopes “‘ it may be found to present the fact 
in a condensed, yet interesting form.’ Of this there is no 
doubt, for from first to last it has rarely been our fortune to meet 
with a more interesting and readable book. It consists of six 
