354 



Illixgworih (J. F.). Arsenic for Grub-infested Soils. — //. Econ. 

 Enf., Concord. X.H., xiv, no. 2, Apnl 1921, pp. 238-239. 



An application of arsenic at the rate of 80 lb. per acre has proved 

 an effective check on Isodon puncticoUis, Macl., infesting cucumbers. 

 The results of the observations are most encouraging, especially as 

 the poison has no detrimental effect on growing plants even when 

 used at the excessive rate of 200 lb. per acre. Tests have also sho\\-n 

 that sugar-cane grown on treated land does not take up the poison. 

 The effect of arsenic on soil bacteria is the onl\- possible disadvantage 

 of this treatment. 



B.\RBER :G. W). U.S. Bur. Ent Possible Use of a Trap to control 

 Leafhoppers injurious to Fruit Trees. — ]L Econ. Ent.. Concord, 

 X.H., xiv, no. 2, April 1921, p. 240. 



During experiments %\-ith traps baited with grape-fniit and placed 

 in an apple tree, thousands of adults of Empoa rosae were caught. 

 The trap was about four feet from the groimd and at least three feet 

 below the nearest foliage. This method may prove of assistance in 

 the control of this pest. 



Quarantine Proclamation No. 82. — Extract from C onwionweaUh of 

 AustraUa Gazette, n.x 43. 12th May 1921. 



By a proclamation dated 6th May 1921 under the Quarantine Act 

 1908-1920, the introduction into Australia is prohibited of the following 

 insects : Attagcniis iindulatiis, Motsch. (khapra beetle), Pyraiista 

 Hubilalis, Hb. (European com borer). Platycdra [GelccJn'a) gossypiclla 

 (pink boll-worm) and all other Gelechiids^ and Anthonomus grandis 

 (Mexican boll wee\il). 



Hill (G.). The White Ant Pest in Northern Australia. — Australia: 

 Inst. Sci. & hid., Melbourne, Bull. 21. 1921. 26 pp., 15 plates. 



This paper is in the nature of a preliminary note to a more com- 

 prehensive study which, it is hoped. \\\\\ be published later. While 

 termites in northern Australia are probably unrivalled b\- an\' other 

 insect in economic importance, there are many species that are of minor 

 importance, harmless, or even in some cases beneficial. 



The most injurious species are Mastotermes danciniensis, Coptotermes 

 acinaciformis, Rhinotermes reticulatus, R. intermedius, and one or two 

 undetermined species of Eutermes. The first-named is the largest 

 and most destnictive termite. It frequently constnicts a nest in a 

 fence-post or dead tree, the wood lying beneath or just above the 

 surface of the ground being entirely replaced by tier upon tier of 

 horizontal cells. 



Practically all indigenous trees producing timber of any economic 

 value are subject to attack by termites, and many root-crops, sugar- 

 cane, melons, fruit trees, cassava, pawpaw, granadilla, Poinciana, 

 sisal, potatoes, coconuts, pineapples, etc., are also destroyed by them. 

 The predominant forest trees are species of Eucalyptus, which produce 

 the bulk of the timber used in the country, and nearly all of them 

 are subject to attack, the heart wood especially being destroyed by 

 Coptotermes and occasionall}- by Rhinotermes. The attack begins 



