THK ENTOMOLOGIST. Ill 



of Management includes Dr. Boisduval, M. Guerin-Mene- 

 ville, and other entomologists and scientific agricullurists. 

 The exhibition is to be made as comprehensive as possible, 

 the scheme including the propagation of useful insects, 

 methods of curing or preventing disease, and economical 

 management; and the illustration of destructive insects, with 

 means for opposing their ravages. As regards destructive 

 insects, the Committee has determined on a practical instead of 

 a scientific classification, the subdivisions being formed by the 

 plants upon which the creatures feed. Foreigners are invited 

 to take part in the coming exhibition ; applications to be 

 sent in before the 20th of July, to the Secretary of the 

 Societe d'Insectologie Agricole, No. 1, Rue Cadelte, Paris, 

 or at the Palais de I'lndustrie. The insects or other objects 

 of exhibition are to be sent in before the 25th of July, and 

 the exhibition opens on the 1st and closes on the 31st of 

 August. The following are the principal heads of classifi- 

 cation :— First division ; Useful insects — 1st class. Silk-pro- 

 ducing insects ; 2nd class, Insects producing honey and wax ; 

 3rd class. Insects used in dyeing and for colour ; 4th class. 

 Edible insects, Crustacea and mollusks ; 5lh class. Insects 

 employed for medical use ; Glh class. Insects used as orna- 

 ments^ Second division : Destructive insects — Ten classes, 

 viz., those which attack cereals, the vine, plants used in 

 industry, forage, vegetables and ornamental plants, fruit trees, 

 forest trees, timber used for building, truffles and fungi, dry 

 organic matter, and, lastly, parasites of man and domestic 

 animals. The third division includes three classes — carni- 

 vorous insects, parasitic insects ; destructive of chrysalides ; 

 and insectivorous animals, birds and reptiles. The fourth 

 division includes — Insects and other creatures destructive of 

 mollusks ; and notices respecting edible snails and the benefit 

 that cultivators may derive from them. Lastly, optical instru- 

 ments for entomological purposes, and special apparatus con- 

 nected with the rearing or destruction of insects. Printed or 

 written memoirs are also to be admitted, even without speci- 

 mens of the insects to which they refer ; and it is further 

 announced that conferences will take place in the exhibition 

 on various siibjects connected with "insectology" [.? Ento- 

 mology]. 



Mr. M'Lachlan exhibited the larva of a caddis-fly found 



