50 



coccineus) (red scale) which is the worst to deal with, Chrysomphalus 

 (A.) rossi (black scale), Diaspis santali, Icerya purcliasi (cottony cushion 

 scale) and thrips, all of which may be successfully combated by red-oil 

 emulsion ; Saissetia (Lecanimn) oleae (olive scale) ; black aphis 

 [? Toxoptera aurantii] ; and leaf-roller caterpillar [Tortrix postvittana], 

 which has caused considerable damage during the past few years 

 by eating off the young shoots and flower-buds of young trees, and 

 may be dealt with by the use of lead arsenate at a strength of 4 or 5 in 

 100, at intervals during spring and summer. 



Kerle (W. D.). The Peanut.— iV./S. TF. Dept.Agric, Sydney, Farmers' 

 Bull. no. 119, August 1918, 39 pp., 16 figs. [Received 7th 

 December 1918.] 



This bulletin reviews the possibilities of the cultivation of the pea nut 

 {Arachis hypogaea) in Australia and records the better known insect 

 pests of this plant throughout the world. No attacks by insects on 

 it have as yet been recorded from Australia. 



DUPORT (M.). Rapport a Monsieur le President de la Chambre d' Agri- 

 culture du Tonkin et du Nord-Annam sur les Travaux effectu^s en 

 1914 & la Station Entomologique de Cho-ganh. [Report to the 

 President of the Chamber of Agriculture of Tonkin and North- 

 Annam on the Work carried out in 1914 at the Entomological 

 Station of Cho-ganh.] — Supplement to Bull. no. 102, Chambre 

 Agric. Tonkin, Nord-Annam, January-February 1915, 46 pp, 

 [Received 2nd December 1918.] 



Investigations on the Longicorn beetle, Xylotrechus guadripes,. 

 Chevr. (coffee borer), and other coffee pests at the entomological 

 station of Cho-ganh, established for that purpose in 1914, are described. 

 Owing to interruption of the work by the War many points in the habits 

 of this pest remain to be elucidated, and none of the treatments 

 proposed have as yet given any practical measure of success. It is. 

 hoped, however, that the new data obtained may be of some interest 

 and assistance to coffee planters who are troubled by this, the principal 

 enemy of the coffee crop. 



Studies undertaken with a view to determine the life-cycle of 

 X. quadripes were begun in June 1914. In a climate such as that of 

 Tonkin, the life-cycle varies considerably according to the season^ 

 while other factors also intervene to accelerate or retard the develop- 

 ment of the larvae and their pupation. From rearing experiments 

 from June to September it was found»that on two plants infested in 

 June and July the life-cycle occupied a minimum of four months, 

 and that the same plant after the emergence of adults may still contain 

 nymphs and larvae in different stages of development, all arising from 

 eggs deposited about the same date. An attempt was made to induce 

 X. annularis, which lives in dried bamboo, to oviposit on coffee plants, 

 but without success. Other species more closely allied to X. quadripes 

 may possibly oviposit on coffee, but the author is doubtful whether 

 such infestation occurs naturally. X. buqueti, for example, has been 

 taken in the close vicinity of coffee plants, but not on them. The 

 opinion is expressed that X. annularis should be placed in the allied 



