144 



Gatenby (J. B.). Note on Apanteles glomeratus, a Braconid Parasite 

 of the Larva of Pieris brassicae. — Entmnologists' Mthly. Mag., 

 London, Iv, nos. 656 & 657, January & February 1919, pp. 19-26. 



The Braconid, Apanteles glomeratus, generally attacks young cater- 

 pillars of Pieris brassicae, in which it deposits from 30 to 60 eggs, all 

 of which hatch out. The resulting larvae eat the fat-body of the 

 host and finally emerge when the latter is about full-grown. They 

 issue simultaneously from the middle third of the body of the host 

 and immediately begin to spin cocoons. Parasitised Pierid larvae 

 appear to be able to grow to the same size as normal individuals, but 

 the gonads are nearly always seriously reduced and no spermatozoa 

 are developed. When only a few parasites have been present, the host 

 larva may arrive at the pupal stage, and it has even been recorded 

 that such an individual has given rise to an imago. 



Goodwin (W. H.). Grain Bin Sanitation. Insect Injuries to Stored 

 Cereals prevented by Cleaning Bins. — Mthly. Bull. Ohio Agric. 

 Expt. Sta., Wooster, no. 19, July 1917, pp. 223-224, 1 fig. 

 [Received 1st February 1919.] 



It is estimated that in Ohio the annual damage to stored grain 

 by insects amounts to approximately £200,000. 



Farmers can prevent injury to a large extent by cleaning the bins 

 carefully each season before new grain is placed in them. After 

 cleaning, the bins should be sprayed thoroughly with 10 per cent, 

 kerosene emulsion and then allowed to dry for a week before use. 

 Grain containiug much moisture or showing signs of sprouting should 

 be thoroughly dried before storage. Stored grain should be disturbed 

 at least once a month by shifting it into another bin, and if air be 

 pumped through the stored grain for several days in succession, 

 beetles will leave the grain in large numbers. The latest investigations 

 show that the best method of fumigation at 70° F. is to spray carbon 

 bisulphide over the grain through a small opening in the side of the bin 

 with a small spray pump. The opening should be immediately closed 

 after spraying. 



HousER (J. S.). Insect Pests of Vegetables. Methods of Control 

 suggested for the more troublesome Kinds. — Mthly. Bull. Ohio 

 Agric. Expt. Sta., Wooster, no. 19, July 1917, pp. 232-240, 10 figs. 

 [Received 1st February 1919.] 



A brief description of the more common and destructive garden 

 pests is here given, with an account of the damage they cause and notes 

 on spraying materials and machinery, repellent mixtures and poisoned 

 baits. 



HousER (J. S.)- The Pink and Green Potato Plant Louse.' — Mthly. 

 Bull. Ohio Agric. Expt. Sta., Wooster, no. 20, August 1917, 

 pp. 261-267, 6 figs. [Received 1st February 1919.] 



The outbreak of MacrosipJmm solanifolii (pink and gieen potato 

 aphis) that occurred in Ohio in 1917 is dealt with in this paper, but 

 has already been described from another source [see this Review, 

 Ser. A, vi, p. 4.55]. 



