455 



meditahunda (pea chink) have both caused severe damage to cotton 

 in some locaUties. It was found that the injury inflicted by these 

 bugs, and in particular by N. viridula, prevents development of the 

 lint and causes the shedding or drying up of young bolls. Direct 

 injury to the bolls generally results in complete loss. Experiments 

 showed that the punctures of N. viridula readily cause infection with 

 the fungi of internal boll disease, but only when the bugs are transferred 

 from infected plants. No infection was produced even in the latter 

 case by E. meditabunda. 



HuTSON (J. C). Notes on Certain Plant Bugs connected with Cotton 

 in St. Vincent—West Indian Bull, Birbados, xvii, no. 1, 1918, 

 pp. 27-39. 



The information contained in this paper is based upon observations 

 on plant bugs in St. Vincent which have previously been recorded 

 [see this Review, Ser. A, vi, p. 249]. 



Sands (W. N.). Some Effects of Cotton Stainer Control in St. Vincent. 



— West Indian Bull, Barbados, xvii, no. 1, 1918, pp. 40-46. 



The benefits that hav^e resulted from the measures adopted against 

 Dysdercus delauneyi, Leth. (cotton stainer) in 1916-1917 [see this 

 Review, Ser. A, v, p. 567, 581] are recorded. It is estimated that as 

 a result of these measures cotton growers in St. Vincent benefited to 

 the extent of several thousand pounds sterling. The latest Ordinances 

 regarding the control of cotton stainer define the close season for 

 cotton and render remedial measures compulsory on all infested 

 estates. 



Sands (W. N.). Notes on Trapping the Cotton Stainer in St. Vincent. 



— West Indian Bull., Barbados, xvii, no. 1, 1918, pp. 47-49. 



Details are given in this paper of the carrying out of remedial 

 measures for Dysdercus delauneyi advocated in a previous paper [see 

 this Review, Ser. A, v, p. 581]. 



HousER (J. S.), GuYTON (T. L.) & LowRY (P. R.). The Pink and 

 Green Aphid of Potato. — Ohio Agric. Expt. Sta., Wooster, Bull, 

 no. 317, November 1917, 88 pp., 21 figs. [Received 30th August 

 1918.] 



This bulletin describes a heavy infestation of Macrosiphum solanifolii, 

 Ashra. (pink and green aphis of potato) that occurred in Ohio in 1917. 

 While the plants most heavily infested were the potato {Solarium 

 tuberosum, L.), tomato {Lycopersicum esculentum, Mill), egg-plant 

 (Solanum melongena, L.), pepper (Capsicum annuum, L.) and sunflower 

 (Helianthus annuus, L.), many other plants, of which a fist is given, 

 were commonly though less seriously attacked. The nature and 

 extent of the injury is discussed, both as regards potatoes and tomatoes. 



Internal parasites of M. solanifolii, which constitute the greatest 

 single factor operating in reducing the pest, include the Hymenoptera, 

 Aphidius polygonaphis. Fitch, Pachyneuron aphidivorum, Ashm., and 

 two species of the genus Lygocerus, the first-named being the most 

 abundant. The Coccinelhds predaceous on this Aphid are : — 



