25 



* 



drenching spray of ordinary poisoned Bordeaux mixture ; Macrobasis 

 unicolor, Kby. (ash-gray blister beetle), injurious to potatoes in the 

 first half of July ; Hylemyia antiqua, Mg. (imported onion maggot) ; 

 Phorhia hrassicae, Bch. (cabbage root maggot); Leptinotarsa decem- 

 lineata, Say (Colorado potato beetle) ; Macrosiphum solanifolii, 

 Ashm. (potato aphis), which was present in large colonies and was 

 successfully controlled in Ottawa by spraying with Blackleaf 40 ; 

 Epitrix cucumeris, Harr. (potato flea-beetle), which attacked potatoes 

 in early July and also tomatoes and cucumbers ; Ceramica picta, Harr. 

 (zebra caterpillar), present in large numbers in September on turnip 

 and cabbage ; Diacrisia virginica , F. (yellow woolly-bear caterpillar) 

 and Estigmene acraea, Dru. (salt marsh caterpillar), abundant in 

 Eastern Canada, In the Ottawa district in August and September 

 the fohage of low-growing plants was much injured, and cabbages, 

 turnips and other vegetables were eaten. The outbreak has been the 

 worst for many years. Elaterids ( wireworms) damaged potato tubers ; 

 Lachnosterna spp. (white grubs) caused but little injury, though 

 there were important flights of L. dubia during the latter half of May 

 and injury by the second-year larvae is anticipated in 1918. 

 Conocephalus fasciatus, De G, (slender meadow grasshopper) was very 

 destructive in some localities to maize. Psila rosae, F. (carrot rust-fly) 

 was injurious in some gardens in the Ottawa district ; Phyllotreta 

 armoraciae (horse-radish flea-beetle) occurred in large numbers in 

 one or two localities, the leaves of horse-radish being riddled by the 

 beetles. 



Fruit and forest trees were attacked by Schizura concinna,, A. & S. 

 (red-humped apple-tree caterpillar), which was unusually abundant in 

 some orchards ; Eriocampoides limacina,''Retz. (cherry slug) ; Eucosma 

 (Tmetocera) ocelhna, SchifE. (eye-spotted bud-moth) causing important 

 injury in some imsprayed orchards. Halisidota caryae, Harr. (hickory 

 tussock caterpillar), H. maculata, Harr. (spotted tussock caterpillar) 

 and H. tessellaris, A. & S. (checkered tussock caterpillar) were all 

 remarkably abundant on apple, elm, basswood, maple, birch and 

 other trees. 



In gardens and greenhouses Poecilocapsus lineatus, F., (four-lined 

 leaf-bug) damaged the foliage of asters, dahlias, zmnias, etc. ; 

 Papaipema mtaphrada, Grt. (burdock borer) destroyed delphiniums, 

 dahhas and other plants with succulent stems ; Pyrrhia umbra, Hfn., 

 destroyed rose-buds at Ottawa, young larvae being found on 21st July. 

 In the control of soft scale-insects on ferns a successful spray was made 

 with 3 oz. Sunhght soap to one U.S. gal. water, applied heavily several 

 times at one week's interval, 



CosENs (A.). Report on Insects for the Year ; Division no. 3, Toronto 

 District.— 4M Ann. Rept. Entom. Soc. Ontario for 1917, Toronto, 

 1918, pp. 20-22. [Received 16th November 1918.] 



In the Toronto district the conditions were extremely favourable 

 to Lepidoptera in 1917. Hemerocampa leucostigfna, S. & A. (white- 

 marked tussock moth) was abundant throughout the city, defoliating 

 many of the shade-trees, particularly horse-chestnuts, and Acronycta 

 americana was plentiful on elms. The larvae of Diacrisia virginica, 

 F., which are usually seen only in the autumn, were abundant in gardens 



