140 



in June from cocoons dating from the preceding November and 

 December. A second generation occurs in August, the caterpillars 

 of which are found up to October. If the weather is favourable, 

 or if the rains are delayed, a third generation occurs up to December, 

 and becomes the one that hibernates. 



In Egypt it has been suggested that no Malvaceous plants should be 

 grown within a wide radius around cotton. The author proposes, 

 howex'er, that H. esciilentiis should be sown very early, in order that 

 its fruits (which are more tender, and appear earlier than those of 

 cotton) should attract all the moths of the first generation. As 

 soon as the eggs have been deposited, the crop should be gathered and 

 all the plants removed, and used as forage or fibre before the adults 

 emerge. 



Leefmaxs (S.). Het Nut van de Studie der Insekten-Parasiten voor 



den Landbouw. [The ^'alue to Agriculture of the Study of 

 Parasites of Insects.] — Tevsmannia, Batavia, xxxi, no. 8, 1920, 

 pp. 357-372. 



A list of the cosmopolitan genera or species of insect pests is given, 

 with notes on their food-plants and distribution in America, Africa, 

 and the Dutch East Indies. The conditions governing the successful 

 introduction of parasites are enumerated. The author advises the use 

 of polyphagous species in preference to that of monophagous ones, 

 and deprecates the simultaneous introduction of two or more parasites 

 of a given stage of the pest concerned. For instance, if an egg-parasite 

 has been imported, the other introductions should be enemies of the 

 larva, pupa or imago. An international organisation is desirable 

 for the purpose of studying these beneficial insects systematically 

 and biologically, and for promoting international co-operation between 

 economic and systematic entomologists. 



Uyttenboogaart (D. L.). Polyphylla fullo, L. — Ent. Ber. Ned. Ent. 

 Vereen., The Hague, v, no. 117, 1st January 1921, pp. 298-300. 



In July 1920 great swarms of Polyphylla fullo occurred at Noordwijk. 

 Night-jars and bats destroyed large numbers of the swarming beetles, 

 which included very few females. The latter remained quiescent 

 on firs, poplars, and privet. 



Smits VAX BuRGST (C. A. L.). Meniscus transversostriatus, n. sp. 

 (Ichn.). — Ent. Ber. Ned. Ent. Vereen., The Hague, v, no. 117, 

 1st January 1921, pp. 300-301. 



Meniscus transversostriatus, sp. n., an Ichneumonid bred from the 

 pupa of Pennisetia (Bembecia) hylaeiformis, Lasp., near Berhn, is 

 described. 



MoREiKA (C). As Brocas da Figueira cultivada. [The Grubs of the 

 cultivated Fig.] — -Cliacaras c Ouinlacs, S. Paido, xxii, no. 6, 

 1 5th December 1920, p. 482. 



In reply to an enquiry it is stated that three borers attack the 

 cultivated fig in Brazil. One is the Pyralid, Azochis gripnsalis. 

 The larva of a weevil, Hcilipus bonelli, is usually found in the axillae 



