ENTOMOLOGY. 373 



after its application it may appear that a large number of the scale insects have 

 escaped destruction; they are gi'adually destroyed, however, during a period <jf a 

 niontli or more. The scale insect against which this remedy was chiefly usetl was 

 DidSjiis jiriit<n/<iii(i. 



Cyanid gas remedy for scale insects, ('. P. Lounsbuky {Depf. Agr. ('ape (iood 

 Hope, Pamphlet 11, 1901, pp. 27, ph. 3, figs. 11). — In this pamphlet the author dis- 

 cusses the various materials which are required in making tents and transporting 

 them from tree to tree. Notes are also given on the chemicals required for generat- 

 ing the gas, the method of mixing the I'hemicals, and the most satisfactory vessels to 

 l)e used in these operations. The treatment of trees with hydrocyanic-acid gas is 

 said to exterminate the red and brown scale by a single application, and in general 

 to be the most effective remedy for the extermination of scales in orchards. 



The spraying r nd cleaning of fruit trees, A. G. Campbell {Jour. Dept. Agr. 

 Victoria, 1 [1902), No. 3, pj). '290-29:3). — Brief notes are given on methods of com- 

 bating codling moth, woolly aphis, plant lice on peaches, and leaf rust and leaf curl 

 of peaches. 



The grass thrips, L. R. Gary {Maine Sta. Bui. 83, pp. 95-128, pis. 7).— The life 

 history, extraordinary ai)pearance, and gross and microscopic anatomy of Anopho- 

 tlirijis striata are described in detail. Notes are given on the habits of the insect. It 

 attacks a number of commcju grasses, but is most injurious to June grass and tim- 

 othy. It may V)e destroyed l)y spraying with kerosene emulsion or whale-oil soap, 

 ])ut these remedies can not l)e applied successfully on a large scale. Considerable 

 hel}) may be obtained from burning the ground over in the fall and thorough culti- 

 vation under a system of rotation. 



Thrips on cocoa {Bui. Bot. Dept. Jamaica, 9 {1902), No. 5, pp. 70, 71, figs. 2).— 

 A species of thrips is reported as causing a discoloration of cocoa pods. It was a dif- 

 ficult matter to determine when the discolored pods became ripe, on account of the 

 l)resence of the discoloration. The pods are attacked when about half grown. Lit- 

 tle damage was done to the leaves, except where thrips were very abundant. A 

 spray of kerosene emulsion is recommended for destroying this insect. 



Means of combating Tortrix ambiguella, H. Grosiean {Bui. Soc. Vaud. Agr. 

 et ]'it. [Lau.'^anne], 1902, No. l'>l,]>p. 17-24)- — Notes are given on the various remedies 

 which have been found most successful in combating tiiis insect in its various stages. 



Methods of combating Cleonus punctiventris, S. Hkrzhinski {Selsl-. Khoz. i 

 Lyesov., W4 {1902), Feb., pp. 337-368).— This beetle is said to be quite widely dis- 

 tributed, and is especially injurious to beets. A number of experiments were made 

 for the purpose of determining the value of fungus diseases in combating the insect. 

 The fungi used for this purpose were Oospora destructor and Sorosporelki agrotidis. 

 These fungi are said to occur spontaneously in tields infested with the beetles, and a 

 certain number of beetles are annually destroyed l)y them. Experiments reported 

 in this article indicate that satisfactory results may be obtained from distributing the 

 fungi in infested tields so as to destroy the larv;e and pu^rn of the l^eetle while in the 

 ground. It is estimated that not less than 1 lb. of the fungus material is required for 

 each acre of ground upon which beets are raised in 5 or 6 year rotations. In some 

 cases 2 or 3 lbs. per acre were required, while on ground where beets had never been 

 raised it is recommended that 9 to 10 lbs. be used. — p. fireman. 



Botys sticticalis in the summer of 1901, V. P. Pospelov {Izv. Moscow Selsk. 

 Khoz. Inst. [Ann. Inst. Agron. Moscoii], 7 {1901), No. 3-4, pp. 313-324).— This species 

 is found chiefly on the southern Russian steppes. It does not usually attack culti- 

 vated plants, but in 1901 was found on cabl)age, cucumber, watermelon, canteloupes, 

 and other garden and field crops. The methods recommended for combating it are 

 fall or early sprmg plowing of infested soil, burning over the ground, and spraying 

 with Paris green and lime. — p. fireman. 



A sawfly on turnips, Bouvier {Rev. Gen. Agron. [Louvain'], 11 {1902), No. 4, pp. 



