4S9 



AsHCROFT (K. W.). Allotment Pests. — S. E. Nat., London, 1918, 

 pp. 73-87. [Received 12th September 1919.] 



This paper intended as a guide to allotment holders gives a brief 

 and popular accoimt of the life-history of, and remedial measures 

 for the pests most hkely to occur. These include the bean aphis, 

 Aphis rumicis ; wireworms such as Agriotes lineatus, A. obscurus 

 and Athens haemorrhoidalis ; Tipula oleracea ; Pieris brassicae, 

 P. rapae and P. napi ; the turnip flea-beetle, Phyllotreta (Haltica) 

 nemorum ; the cabbage-root fly, Phorhia {Chortophila) brassicae ; 

 the carrot fly, Psila rosae ; and the onion fly, Hylemia antiqua 

 {Phoibia cepetorum). 



Marshall (G. A. K.). Some new Injurious Weevils from Asia. — 



Bull. Entom. Research, London, ix, no. 4, July 1919, pp. 273-277, 

 1 plate. 



The new species described are Antinia theivora, taken in Java 

 feeding on tea plants ; Dyscerus fletcheri, from Assam at an elevation 

 of 5,000 feet, where the weevils were boring into growing apple fruits, 

 and from the United Provinces, where they were breeding in logs of 

 Pinus longifolia ; D. malignus, adults of which were observed punc- 

 turing apple fruits in Assam ; and Alcides mali, from Assam at an 

 elevation of 5,000 feet, boring into the shoots of apple trees. The 

 latter species is closely alKed to A. liulificator, which attacks teak 

 in Burma. 



Gouc4H (L. H.). On the Effects produced by the Attacks of the 

 Pink BoUworm on the Yield of Cotton Seed and Lint in Egypt. — 

 Bidl. Entom. Research, London, ix, no. 4, July 1919, pp. 279-324, 

 1 plate, 26 tables. 



A short summary is given of the known facts concerning the life- 

 history of Pectinophora (Gelechia) gossypiella, particularly as regards 

 Egypt, the food-plants, distribution and habits being briefly discussed, 

 also the rate of increase of the pest since its first appearance in 

 Egypt in 1911. The rest of the paper explains the nature of the damage 

 to cotton, as far as has been ascertained up to the present, and 

 examines the possibihty of estimating its extent. No attempt is 

 made to show the damage to the quaUty of the lint or seed ; only 

 the total quantities lost have been traced. The calculations for 

 estimating the loss of crop, which are described and illustrated by 

 tables, include an examination into the weight of sound seed from 

 attacked bolls, from which it is found that the average weight of 

 seeds falls steadily as the percentage of infestation rises ; the germina- 

 tion of sound seed from attacked bolls, which is indirectly affected 

 by P. gossypiella ; the number of seeds, sound or attacked, that 

 develop in attacked bolls ; the effect of infestation on the amount 

 of hnt produced, and an estimation of the damage done. It does 

 not appear that the percentage of lint is greatly altered on account 

 of the attack. Damaged seeds seem to produce lint on an average 

 in the same proportion to their remaining seed weight as sound seeds 

 from the same samples do. The damage done to attacked seeds 



(604) D 



