1918] ECONOMIC ZOOLOGY — ENTOMOLOGY. 259 



flowers at Wamberal sufficient to prevent the formation of pods. Tobacco and 

 soap applied as a spray appears to be a satisfactory remedy. 



Work of combating the pear thrips in the Saanich Peninsula, A. E. Came- 

 ron and R. C. Tkeherne {Agr. Jour. [Brit. Columbia], 1 (1917), No. 12, pp. 

 208, 212). — The authors find that the attaclcs of pear thrips {Tceniothrips in- 

 consequens) , which is distributed throughout tiije peninsula and as far north 

 as Duncan, can be absolutely controlled on apples, although unsatisfactory 

 results have been obtained in the control of the pest on Italian pears and 

 prunes. 



As a first application for apples, pears, cherries, prunes, and plums and 

 later applications on cherries, prunes, and plums, whale-oil soap, 5 lbs. ; black- 

 leaf 40, i pint; and water, 85 gals, is recommended, the first application to 

 be made at the time the thrips make their appearance on the buds, the second 

 when the blossoms are showing pink or white, as the case may be, and the 

 third just after the blossoms are shed. Owing to the prevalence of apple 

 scab the authors recommend a combination spray of summer strength lime- 

 sulphur and blackleaf 40 in the proportion of 1 : 900 for the second and third 

 applications for apples and pears. 



" One of the most unsatisfactory aspects of the thrips attack in the Saanich 

 Peninsula is the repeated failure of the prune crop. The buds are very soon 

 destroyed once the pest effects an entrance, and the damage done to Italian 

 prunes and different varieties of plum is probably far heavier proportionately 

 than that done to pears." 



Contribution to the knowledge of the galls of Java. — II. The thysanop- 

 terous cecidia of Java and their inhabitants, H. Karny and W. and J. van 

 Leeuwen-Reijnvaan (Ztschr. Wiss. Insektenbiol., 10 (1914), Nos, 6-7, pp. 201- 

 208; 8-9, pp. 288-296; 10-12, pp. 355-369; 11 (1915), Nos. 1-2, pp. 32-39; S-4, 

 pp. 85-90; 5-6, pp. 138-147; 7-8, pp. 203-210; 9-10, pp. 249-256; 11-12, pp. 

 324-331). — This second contribution to the thysanopterous cecidia and their 

 inhabitants in Java is in continuation of that previously noted (E. S. R., 30, 

 p. 250). 



Helopeltis in tea gardens, S. Leefmans (Dept. Landb., Nijv. en Handel 

 [Dutch East Indies], Meded. Proefstat. Thee, No. 46 (1916), pp. 21; abs. in Rev. 

 Appl. Ent., Ser. A, 5 (1917), No. 3, pp. 131, 132).— This interim report deals with 

 Investigations of species of Helopeltis in Java extending over a period of two 

 years. 



Contribution to the Helopeltis problem in tea culture, S. Leefmans (Dept. 

 Landb., Nijv. en Handel [Dutch East Indies], Medcd. Lab. Plantenziektcn, No. 

 26 (1916), pp. yi+214, pis. IS). — This is an extended report of investigations 

 conducted in Java. The classification and biology of the several Javanese 

 species of Helopeltis, namely, H. antonii, H. theivora, H. ciineatus, and H. 

 cinchonce, are first dealt with, followed by a discussion of natural enemies, 

 control measures, etc. 



H. antonii is the principal enemy of tea in Java. H. theivora, the most 

 dangerous enemy of tea in British India, does not cause much injury in Java, 

 and in West Java has only been found in the lowlands. //. cuneatus, a species 

 new for the fauna of Java, does not attack tea and has been found only on 

 plants of the family Araceje. H. cinchonce, a second species new for the fauna, 

 has lately been found to attack tea and possibly will grow more dangerous in 

 the future. 



A map is given which shows their distribution in West Java. A summary 

 of the investigation is given in English and a bibliography of 27 titles is 

 included. 



