419 



Smith (L. B.). Second Report on Insecticides for the Control of the 

 Colorado Potato Beetle [Leptinotarsadecemlineata, Say). — Virginia 

 Truck Expt. Sta., Norfolk, Bull. no. 17, 1st October 1915, 

 pp. 369-376, 2 tables. [Keceived 5th August 1916.] 



Various insecticides were tested as to their value in controlling larvae 

 and adults of Leptinotarsa decemlineata. Five sprayings were made 

 between 19th May and 19th June inclusive ; the number of hving 

 beetles was counted before, and 24, 48 and 72 hours after spraying. 

 The results showed that 91*8 per cent, of the adults and 90-9 per cent, 

 of the larvae were killed by a spray consisting of 50 U.S. gals, home- 

 made Bordeaux mixture, 4 lb. lead arsenate, and 1 lb. Paris green. 

 No injury to the foliage was observed. Zinc arsenite paste, at the rate 

 of 2 lb. to 50 gals. Bordeaux^mixture, destroyed 80*7 per cent, of adults 

 and 87*7 per cent, of larvae. The poison acted rapidly and did not 

 injure the foliage. This preparation is recommended for general use. 

 Calcium arsenate, at the rate of 5 lb. paste to 50 gals. Bordeaux mixture^ 

 was tested, with the result that 78*2 per cent, of adults and 66-5 per 

 cent, of larvae were killed. This compound may in future prove of 

 much value as an insecticide, since it did not injure the leaves, showed 

 marked adhesive properties and was cheaper than lead arsenate.. 

 Several proprietary compounds also gave satisfactory results. 



Surface (H. A.). The Striped Stalk Boxqv.— Weekly Press Bull.^ 

 Penns. Dept. Agric, Harrisburg, i, no. 29, 27th July 1916. 



Papaipema nehris (nitela) (striped stalk borer) injures potatoes,, 

 tomatoes, dahlias, chrysanthemums, etc. The only method of control 

 is to cut and burn infested plants and weeds growing near them. 

 Weeds should be mown three or four times a year to prevent the insect 

 from reaching maturity. 



KuwANA (S. I). Some New Scale Insects of Japan. — Annotationes 

 Zoologicae Japonenses, Tokyo, ix, no. 2, June 1916, pp. 145-152, 

 1 plate. [Received 5th August 1916.] 



The following new scale-insects are described : — Protopulvinaria 

 japonica on Fatsia japonica ; Asterolecanium hambusicola, A. hemi- 

 sphaericmn and A. masuii, on bamboo ; A. litseae on Litsea glauca ; 

 A. tokyonis, on Pasania cuspidata; and Nipponorthezia ardisiae, gen. et 

 sp. n., on the roots of Arddsia japonica. 



BuTTRiCK (P. L.). Another Insect Enemy of the White Pine.— ^mer. 

 Forestry, Washington, B.C., xxii, no. 271, July 1916, pp. 395-396^ 

 4 figs. 



This article gives information regarding the pine sawflv Lophyrus 

 pini, L. {sinnlis. Hart.), which has already been abstracted [see this 

 Review, Ser. A, iv, p. 242]. 



