327 



the adult weevils \vith baits of fermenting kitul palm wood might be an 

 effective means of control. Cultivation is an important factor ; all 

 dead palms should be cut down and burnt and no rotting stems should 

 be allowed to lie about on the groimd. 0. rhinoceros should be 

 eliminated as far as possible by means of traps and probing, and the 

 bark of the palms should be protected from injury. 



Bastln (H.). British Insects and How to Know ihQm.— London : 



Methuen & Co., Ltd., June 1917, 129 pp., 12 plates, 8vo. 

 Price Is. %d. 



The object of this small text-book is to provide a popular intro- 

 duction to the study of British insects. Following a definition and 

 description of insects in general and a brief review of their evolution 

 and development from elementary forms, an outline classification, 

 adopted from Prof. G. H. Carpenter, of the various orders is given, 

 the distinctive characteristics of each being described, with notes on the 

 life-histories and habits of some of the British species. Both the 

 popular and scientific names of the species dealt with are given and 

 12 good plates from photographs illustrate the text. A sufficient 

 index is appended. 



Parrott (P. J.) & Glasgow (H.). The Leaf-Weevil {Polydrusus 

 iiupressifrons, Gyll.) — New York Agric. Exp. Sta., Geneva, Tech. 

 Bull. no. 56, December 1916, 24 pp., 6 figs., 8 plates. [Received 

 30th May 1917. | 



An account of this paper has already appeared [see this Review, 

 Ser. A, iv, p. 519], but an appendix by Mr. A. B. Gahan gives a descrip- 

 tion of Diospilus polydrusi, sp. n., a Braconid parasite of this 

 weevil. It apparently lays an egg in that of P. impressifrons early in 

 June so that the larva is already in the body of the host when it hatches, 

 and here it remains till May of the following year. After destroying 

 the host, a cocoon is formed within the earthen cell constructed by the 

 host larva, and here the parasite completes its development, the adult 

 emerging early in June. The species is very numerous and active 

 during some seasons and should exert an important repressive action. 



Parrott (P. J.). Some Insects attacking the Pear, and their Control. 



— Neiv York Agric. Expt. Sta., Geneva, Circ. 51, 15th May 1916, 

 18 pp. [Received 30th May 1917.] 



Articles by this author on some of the above insects have already 

 been noticed, namely, the sinuate borer {Agrihis sinuatus, Oliv.) [see 

 this Review, Ser. A, iv, p. 273], the codling moth {Cydin pomoneJh-, L.) 

 [see this Review, Ser. A, iii, p. 445], the false tarnished plant bug 

 [T.ygus invitus, Say) [see this Revieiv, Ser. A, i, pp. 126-127] and the 

 pear psylla {Psylla pyricoh, Forster) [see this Revieiv, Ser. A, i, p. 127]. 



Others now dealt with are Saperda. Candida, F. (round-headed borer), 

 Chrysobothris femorafa, F. (flat- headed borer), Aspidiotus perniciosus, 

 Comst. (San Jose scale), Lepidosaphes ulmi, L. (oyster-shell scale), 

 Chionaspis furfura. Fitch (scurfy scale), Contarinia pyrivora, Riley 

 (pear midge), Conotrachelus nenuphar, Hbst. (plum curculio), Eucosma 

 {Tmetocera) ocellana, Schiff. (bud moth), Cacoecia {Archips) rosaceana, 



