459 



for wider and shorter tents is one-fifth of the difference between the 

 two measurements. Thus a tent 20 by 30 would have a relative size 

 of 22 and should have a dose equal to that of a tent 22 by 22. 



The adoption of this plan of relative sizes makes it possible to present 

 a table of dosage in an exceedingly simple form, and to make the 

 adjustments for different degrees of leakage also very easy. 



A table is given showing the quantities of potassium cyanide, acid 

 and water to be used according to the size of the tent so calculated, 

 a tent of the relative size, 22, requiring 3 oz. of cyanide. 



YoTHERs (W. W.). The Use of Water under Pressure for the Control of 

 Mealy Bug. — Jl. Econ. Entom., Concord, vii, no. 2, April 1915, 

 pp. 304-305. 



A system of spraying with water under high pressure for the control 

 of mealy bugs has been successfully carried out in Florida. A stream 

 of water under about 60 lb. pressure is directed against the places 

 where the fruits touch and where the insects congregate. Three 

 applications are sufficient to control a severe infestation. 



Walker (H. C.). The Box Leaf Miner. — Jl. Econ. Entom., Concord^ 

 vii, no. 2, April 1915, p. 306. 



Monarthropalpus buxi appeared in Newport in the spring of 1912. 

 The larval stage is passed inside the box leaf, and lasts from the 

 autumn to the beginning of June. The adult emerges from the 

 leaf, is active for a short time and, after pairing, the female deposits 

 eggs on the upper surface of the leaf. In August, small protuberances 

 on the leaves show the presence of larvae which apparently remain 

 there until the following spring. Fumigation in early spring proved 

 unsuccessful ; a spray consisting of 4 lb. of powdered sulphur to 

 50 gals, water, applied in June, killed the adults without injuring 

 the plants. 



Felt (E. P.). Juniper Plant Bug {Chlorochroa uhleri, Stal.). — Jl. Econ. 

 Entom., Concord., vii, no. 2, April 1915, p. 308. 



This Pentatomid was very abundant during 1914 in Schenectady 

 County, on sunflower seeds, green maize, peas, tomatoes and currants, 

 the seed or fruit being punctured in each case. Another Pentatomid 

 bug, Euschistus variolarius, was present in small numbers on maize 

 and tomatoes. 



Larch Shoot Moths. — Jl. Bd. Agric., London, xxii, no. 1, April 1915, 

 pp. 50-52, 5 figs. 

 Argyresthia atmoriella, A. laevigatella and A. zellerielU, the larch 

 shoot moths, are widely distributed, the first two species occurring 

 in Britain, the last on the Continent. In Britain, the moths appear 

 in May or June and lay their eggs on the young shoots. The larva 

 proceeds to burrow spirally into the wood. In May of the next year, the 

 larva approaches the surface to pupate, and finally the moth emerges. 

 Members of the genus Larix only seem to be attacked. The side 

 branches as a rule are injured, and die at the end of their first year. 



