517 



any admixture of injurious acid and in a state that is apjjarently 

 more effective than gas generated in the ordinary way. This liquid 

 is to be j)roduced commercially. 



Studies on insects injurious to wattle, the chief of Avhich is the 

 wattle bagworm [Chalioides junodi], have been continued. It is 

 hoped that dust-spraying with an arsenical powder will prove an 

 efficient remedy for the bagworm, but further tests are necessary. 

 Experiments to determine the practicability of trapping the male 

 moths are also projected. 



C4IBS0N (A.). Reports on Insects of the Year ; Division no. 1, Ottawa 

 District.^irz/j Ann. Rept. Entom. Soc. Ontario for 191G, Toronto, 

 1917, pp. 15-17. [Received 12th October 1917."] 



The injurious insects reported during the year included locusts, 

 which disappeared suddenly, owing to adverse weather conditions; 

 cutworms, especially the red- backed cutworm {Euxoa ochrogaster, Gn.) 

 attacking cucumbers, beans, peas and other vegetables ; the cabbage 

 maggot {Chortophila {Phorbia) brassicae, Bch.) ; the onion maggot 

 {Hylemyia antiqua, Mg.) ; the potato flea-beetle {Epitrix cucumeris 

 Harr.), injuring the leaves of tomato; the corn ear worm {Heliothis 

 obsoleta, F.) ; the Scolytid, Ips fasciatiis, Oliv., present in a few ears of 

 maize, an injury not previously reported in Canada ; the salt marsh 

 caterpillar {Estigmene (Diacrisia) acraea, Dru.) on cabbages ; the parsnip 

 web worm {Depressaria heracleana, De G.) ; the zebra caterpillar 

 {Ceraniica jncta, Harr.) damaging turnips, mangels, cabbages and 

 rhubarb ; the ash-gray blister beetle {Alacrobasis unicolor, Kby.) 

 defoliating potatoes unless they were protected by dusting with arsenate 

 of lead. 



Fruit and forest tree pests reported were the pear-leaf blister mite 

 {Eriophyes p)y>'h P^ig-) on apple foliage ; the black walnut caterpillar 

 (Datana integer rima, G. & R.), usually abundant on walnut and 

 hickory; the oyster-shell scale {Lepidosajjhes idmi, L.) ; the imported 

 currant worm (Pteronus ribesii. Scop.) ; and the codling moth {Cydia 

 pomonella, L.). 



In gardens the tarnished plant bug {Lygus pratensis, L.) destroyed 

 large numbers of ziimias and dahhas ; no satisfactory remedy is 

 known for the control of this pest ; the yellow woolly bear {Diacrisia 

 virginica, F.) injured hydrangea foliage. The common carpenter 

 ant {Camponotus pennsylvanicus, De G.), the shed-builder ant {Cremas- sy^ 

 togaster lineolata, Say) and the cockroach, Ectobia {Blattella) germanica, 

 L., were controlled in houses by dusting with sodium fluoride. 



The buffalo carpet beetle (Anthrenus scrophulariae, L ), the black 

 carpet beetle (Attagenus p)iccus, Oliv.), the Indian meal moth {Plodia 

 inter pundeUa, Hbn.), attacking breakfast cereals, and the confused 

 flour beetle {Triboliwm confusum, Duv.), infesting flour, were also 

 reported. 



CosENS (A.). Reports on Insects of the Year : Division no. 3, Toronto 

 District. — 47th Ann. Rept. Ento^n. Soc. Ontario for 1916, Toronto, 

 1917, pp. 18-19. [Received 12th October 1917.] 



Injurious insects recorded include the zebra caterpillar {Mamestra 

 picta), causing extensive damage to turnip crops : Phyllorycter 



