602 



DE Haan (H. R. M). Proeven ter Bestrijding der Bessenboeboek 

 volgens de Metode " van Davelaar " in het Ressort Malang. 



[Experiments in combating the Coffee-berry Borer by the Method 

 of van Davelaar in the Malang District.] — Meded. Koffiebessen- 

 boeboek-Fonds, Soerabaya, no. 4, August 1922, pp. 63-75. 



This paper contains detailed information about eight large-scale 

 practical tests made from February to May 1922 with the van Davelaar 

 method against the coi^ee-berry borer, Stephanoderes hampei, Ferr. 

 [R.A.E., A, X, 507]. The mixture used was made of six parts axle 

 grease and one of petroleum, and this was applied in a thin coat. 

 An excess of petroleum injures the plant, while a lack of it fails to 

 kill the pest. The above proportion seemed suitable for the plant 

 and for killing the adult beetle, but appeared too weak to destroy 

 the larvae. The coating does, however, prevent new attacks. The 

 adhesive quality of the mixture is of a temporary nature, and does 

 not last more than two months in the dry season. About four appli- 

 cations seem necessary for complete results — -the first during October- 

 December ; the second during January-February ; the third during 

 March-April ; and the fourth in May. A fifth application may 

 perhaps be needed in June. This means that 1,000 women workers 

 will be needed for a plantation of 100,000 bushes. For the time being 

 this method can only be useful when a given plantation must be 

 saved at all costs, either because the product is of superior quality 

 or because it is needed for seed or other special reason. 



De Stefani (T.). Intorno ai costumi di una cimice e i danni che 

 essa reca ad alcuni frutti. [The Habits of a Bug and the Injury 

 done by it to some Fruits.] — Allevamenti, Palermo, iii, no. 9, 

 25th September 1922, p. 362. 



The Pentatomid bug, Piezodoriis incarnatus, Germ., occurs in Sicily 

 on mulberry, apricot, plum, cherry and other trees. The fruits of 

 late varieties of apple and pear suffer the most, because they are 

 picked late and are therefore exposed to attack for a longer time 

 and the attack is of increased severity owing to the absence of other 

 fruits. As a rule the feeding of P. incarnatus on apples and pears 

 results in a number of hard, yellowish depressions on the fruits. The 

 injury is most marked in young fruit, much of which fails to ripen 

 and falls. Hitherto no effective remedy has been found, and a study 

 of the biology of this pest is very necessary. 



Bagnall (R. S.). Drepanothrips reuteri, Uzel, an Addition to the 

 British Fauna. — Ent. Mthly. Mag., London, no. 702, November 

 1922, p. 248, 1 fig. 



Drepanothrips reuteri, Uzel, is recorded from Surrey, where it was 

 taken in rolled oak leaves. Its probable identity with D. viticola, 

 Mokr. [R.A.E., A, vh, 195] and its distribution are discussed. 



Laing (F.). a Synonymical Note on Orthezia maenariensis, Dougl. 

 (Coccidae).~£w/. Mthly. Mag., London, no. 702, November 1922, 

 pp. 254-255. 



Re-examination of Orthezia maenariensis, Dougl., shows it to be 

 identical with 0. urticae, L., this synonymy having already been 

 suggested by Lindinger. The genus Douglariella (considered by the 



