116 



hibernate in the fruits, and can withstand a temperature of 14° or 

 15° F. The insects develop rapidly with the advent of warm weather, 

 and emerge from the fruit in April, when the spring crop is in a recep- 

 tive condition. The summer crop carries the insect through the late 

 summer and autumn months until it is ready for oviposition in the 

 winter crop. Various species of figs are discussed, and their dependence 

 on B. psenes for pollination is described. This Chalcid is therefore 

 extremely beneficial in California, where the fig crop is becoming a 

 very important one. 



Ferris (G. F.). Insects of Economic Importance in the Cape Region 

 of Lower California, Mexico. — Jl. Econ. Ent., Concord. N.H., 

 xiii, no. 6, December 1920, pp. 463-467. 



The insects recorded in the above region during 1919 include Blissiis 

 occiduus, Barber, the Tingid Leptodictya tahida, H. S., and the Delphacid 

 Peregrinus maidis, Ashm., on sugar-cane and maize ; Trichobaris 

 mucorea, Lee, on tobacco ; Chrysomphalus aurantii. Mask., and 

 Lepidosaphes glover i. Pack., on Citrus ; Aspidiotus lataniae. Sign., 

 and an apparently native species of Asterolecanium, as well as a thrips, 

 Heliothrips haemorrhoidalis, Bch., on mango ; Saissetia oleae, Bern., 

 on wild food-plants ; Pseudococcus ciiri, Risso, on mango ; Asterole- 

 canium pustulans, CklL, on oleander ; Aspidiotus diffinis, Newst., 

 on guava ; Pseitdoparlatoria parlatorioides, Comst., on guava and 

 avocado ; Pseudococcus maritimus, Ehrh., on wild food-plants ; an 

 undetermined species, probably leery a rileyi, CklL, on numerous 

 food-plants ; Aphis illinoisensis , Shim., on grape ; and the Tingid 

 Corythuca gossypii, F., on castor bean. 



The isolation of the country and the small amount of traffic between 

 this and other districts probably accounts for the small number of 

 pests discovered. 



Maxson (A. C). Com.bating the Sugar Beet Webworro. on a large 



Scale. — //. Econ. Ent., Concord, N.H., xiii, no. 6, December 

 1920, pp. 468-471. 



Loxostege sticticalis, L. (sugar beet webworm) was particularly 

 abundant during 1919 in the Rocky Mountain States. The first 

 brood covered 172,728 acres in June, and the second 7,567 acres in 

 July to August. The campaign against this moth covered a portion 

 of four States, and was organised by the Great Western Sugar Com- 

 pany. The methods employed are described. As it could not be 

 foreseen that the outbreak under review would cover an area five 

 times as large as that infested in 1918, the preliminary preparations 

 proved inadequate, and additional sprayers and insecticides had to 

 be purchased after the campaign had begun. Owing to the ultimate 

 success obtained, several more sprayers and new insecticides have been 

 procured for experimental purposes. Of the substances used in 1919, 

 Paris green, at the rate of 3| to 4 lb. per acre, gave by far the quickest 

 and best results, at an inclusive cost of about 14s. 6d. A timely and 

 successful application of insecticide would mean an average profit of 

 over 400 per cent, on the investment. 



