367 



time of attack are highly effective. Leaf bHster mites were very 

 injurious, and in addition to Eriophyes pyri on apple, E. malinus 

 has been found for the first time in England on apple leaves ; it causes 

 a rosy-pink velvety growth on the leaves, which later turn brown and 

 die. A species of Phyllocoptes was found on an apple twig from 

 Bristol ; this may be P. schlechtendali, known to infest apple trees in 

 Central Europe. Gooseberries were damaged by sawflies and red 

 spider [Tetranychus spp.] ; raspberries by the raspberry beetle [Byturus 

 tomentosus] and bud-moth [Incurvaria rubiella]. No successful remedy 

 for big-bud in black currants has been found ; an effective method of 

 obtaining mite-free plants from infested bushes has already been 

 noticed [R.A.E., A, ix, 486]. 



Root crops suffered from the turnip flea-beetle [Phyllotreta nemorum] 

 and from surface caterpillars ; poison bait is not a popular remedy 

 in England ; poultry on the field during cultivation destroy thousands 

 of the caterpillars. Cabbages and turnips were injured by gall-weevil 

 [Ceuthorrhyjichus pie uro stigma] and by Aphids. Aleurodes spp. were 

 remarkably abundant on all plants of the cabbage tribe, the commonest 

 species being Aleurodes brassicae and Aleurochiton vaporariorum, the 

 latter chiefly on tomatos under glass. The hot-house species can be 

 dealt with By fumigation, but on cabbages little can be done beyond 

 stripping off and burning diseased leaves. 



Forest pests were not abundant, except Aphids, including Lachnus 

 viminalis on willow. 



The nature of Isle of Wight disease in bees is discussed, and the 

 importance of fiirther research to elucidate points that are by no means 

 clear is pointed out. 



Severin (H. C). Twelfth Annual Report of the State Entomologist 

 of South Dakota for the Period ending 30th June 1921. — Brookings, 



S.D. [n.d.], 29 pp., 2 figs. [Received 11th May 1922.] 



A list is given of the more harmful insect pests found in the nurseries 

 of South Dakota, arranged according to the plant attacked. The 

 information concerning Nenrofoma inconspiciia, Norton, has already 

 been noticed [R.A.E., A, ix, 236]. During investigations on Grylhis 

 assimilis, F. (common field-cricket) the following natural enemies 

 were found: — Ceratoteleia marlatti, Ashm., Paridris brevipennis, Fouts, 

 and Exoristoides johnsoni, Coq., parasitising the eggs ; Euthrombidium 

 sp., Gamasids and Paragordins variits, Leidy, parasitic on the adults, 

 the latter also occurring in the nymphs ; and Chlorion cyanetim, 

 Dahl., and spiders predacious on the nymphs and adults. The work in 

 connection with Meromyza americana, Fitch (wheat-stem maggot) 

 has been continued, and in addition to the natural enemies already 

 mentioned [R.A.E., A, ix, 237] Trombidinm sp. ? is recorded as feeding 

 on the larvae ; several food-plants have been added to the existing 

 list. Preliminary lists of the Cicadids, Membracids and Cicadellids 

 occurring in South Dakota are given. 



Paine (S. G.) & Lacey (M. S.). Chocolate Spot Disease or Streak 

 Disease of Broad Beans. — //. Minist. Agric, London, xxix, 

 no. 2, May 1922, pp. 175-177, 1 plate. 



It is only under exceptional weather conditions that chocolate spot 

 or streak disease of broad beans assumes the fonn of an epidemic 

 as was the case in 1920 throughout England and Wales. The organism 



