485 



Several experiments were carried out to determine the value of certain 

 sprays against stem-mothers hatching from the over-wintering eggs, 

 A spray consisting of lime-sulphur (1 to 8) and Black Leaf 40 at the 

 rate of f pt., 1 pt., and 1^ pts. to 100 gals, of the mixture was apphed 

 on 22nd April to one side of the trees only. Examination on 1st June 

 of one variety showed an infestation of 6*4 per cent, on the sprayed 

 side and 28'5 per cent, on the unsprayed. A second series of experi- 

 ments was undertaken on 21st April, when the following sprays were 

 applied, the trees being thoroughlv treated from both sides : — (1) lime- 

 sulphur (1 to 8) and 1| pts. BlackLeaf 40 in 100 gals ; (2) 15 lb. whale 

 oil soap, 1 lb. carbolic acid, 100 gals, water. Examination on 19th May 

 showed that the first spray gave almost complete control, while the 

 second was less effective. Carbolic acid at the rate of ^ oz. in 1 gal. 

 water or lime-sulphur (1-40) had no effect on the Aphids, but caused 

 the death of the shoot. The addition of carbohc acid to the soap 

 solution does not appear to increase its insecticidal value. 



Chapais (J. C). The Chrysopa or Golden-Eyed Fly. — 8th Ann. Rept. 

 Qiiehec Soc. for the Protection of Plants from Insects and Fungous 

 Diseases, 1915-1916, Quebec, 1916, pp. 5(1-51, 1 fig. [Received 

 26th September 1916.] 



About 12 species of the genus Chrysopa are known in Quebec. The 

 eggs are stalked and attached to leaves or twigs. The incubation 

 period is seven days. The larvae are predaceous on Aphids, the larvae 

 of Chermes and of curculios. Maturity is reached in 12 days, a cocoon 

 being formed for pupation. The duration of the pupal stage is 16 days. 



Du PoPvTE (E.M.). Insect Notes, 19i5.~8th Ann. Rept. Quebec Soc. 

 for the Protection of Plants from Insects and Fungous Diseases, 

 Q. 1915-1916, Quebec, 1916, pp. 73-77, 1 plate. [Received 

 26th September 1916.] 



Cereals and clover were attacked by the following insects : — 

 Oscinelki (Oscinis) carbonaria (frit fly), Meromyza americana (wheat 

 stem maggot), and Mayetiola destructor (Hessian fly) on small grains ; 

 Bnichophagus fu)iebris (clover seed Chalcid), Hypera (Phytonomus) 

 nigrirostris (lesser leaf weevil), Bryobia 2Jratensis (clover mite), Acyr- 

 ihosiphon {Macrosiphum) jiisi (pea aphis), and Tychius ficirostris (clover- 

 head weevil). The last-named was abundant on the leaves of red 

 clover during May and continued to feed until September. Hiber- 

 nation took place in the adult stage in lumps of manure and vegetable 

 matter beneath the surface of the soil. 



Grain, hay, root -crops and garden plants were injured by Melanoplus 

 atlantis (lesser migratory locust). M. femur-rubrvm (striped locust) and 

 M. bivittatvs (striped locust). Insects injurious to field and garden 

 crops included : — Euxoa tessellata (cutworm) ; Chortophila brassicae 

 (cabbage root maggot) and C fnsciceps (seed corn maggot) on cruci- 

 ferous crops ; C. vicina (beet-leaf miner) on mangels, beets and 

 spinach ; Psila rosae (carrot rust fly) on carrots ; Psylliodes punc- 

 tulata (hop flea-beetle) on beet and mangel ; Depressaria hera^leana 

 (parsnip web -worm) on parsnip. 



