ENTOMOLOGY. 661 



Filariae in water, it was found that the Filarise died after remaining 3 

 or 4 hours in water. It is therefore believed b}" the author that infec- 

 tion of man by Filarial can not take place from drinking w^ater. 

 An account is given of ^'arious details in the life history of the F. 

 hrnicrofti. 



Natural enemies and insecticide treatments for the larvae of 

 Pieris brassicae, G. del Guercio {Atti. R. Accad. Econ. Agr. Georg. 

 Firenzt\ ^. ser., m {1900), No. '2, pp. 21^2-251^, figs. ^).— Hand picking 

 of the larvfB and eggs of this species is more practicable than in the 

 case of P. rapce and P. napi for the reason that in the latter 2 species 

 the larvtB are found on the under side of the leaves and the eggs are 

 laid in small clusters or isolated. 



The insecticides used against P. hrassicce included superphosphate 

 of lime, emulsions of potash and soda soaps, emulsions of petroleum, 

 benzine, and bisulphid of carbon, emulsions of heavy oil of tar and of 

 creolin, carbolized extract of tobacco, and a solution of alkaline tar. 

 Applications of superphosphate of lime at the rate of 500 kg. per 

 hectare had no noticeable effect upon caterpillars. Emulsions of potash 

 soap, in which the soap constituted from li to 2^ per cent of the 

 emulsion, were quite effective remedies. Soda soaps in from 2i to 3i 

 per cent solution of water gave good results. Emulsions of oil of tar, 

 creolin, and similar substances when used as insecticides against the 

 larvae of the cabbage butterfly left a disagreeable odor upon the cab- 

 bage plants and are therefore not recommended. 



The author describes and gives brief notes upon a considerable num- 

 ber of insect parasites and enemies of the cabbage butterfly. The 

 percentage of caterpillars parasitized by the more important species 

 are tabulated and the importance of insect parasitism of the cabbage 

 butterfly is discussed in connection with this table. 



Moth borer in sugar cane (Diatrsea saccharalis), H. Maxwell- 

 Lefroy ( West Indian Bid., 1 {1900), No. Ji,pp). 327-353,figs. it*).— The 

 author reviews the literature relating to this subject. Detailed descrip- 

 tions are given of the insect in all its stages. The eggs are laid on the 

 surface of the leaf in clusters numbering about 19. The author gives 

 notes on 2 insect parasites, TricliogTaimna pretiosa and Coi'dyceps 

 harheri. As soon as the young leaves of the sugar cane are up, the 

 moth borer begins its attack which results in producing " dead hearts" 

 earl}'' in the year. The attacks of the moth borer render subsequent 

 infestation by the rind fungus {Tncliosphceria sacchari) more easy. 

 All varieties of cane are attacked b}' the moth borer, which has been 

 found also upon a considerable number of other plants. A detailed 

 discussion is given of the remedies which have been recommended by 

 various committees of planters and b}^ agricultural societies. The 

 more important remedies may be briefl}" stated as follows: Careful 

 selection of canes for planting, pruning of dried and decayed canes, 

 destruction of diseased canes and the stumps of canes, and the use of 



