11 



have retarded the larval development of the parasites and thus rendered 

 them less effective. A\nien fruit-growers are convinced that 

 T. argyrospih is present on their trees they should spray thoroughly 

 with a good miscible oil a few days before the buds burst, and this 

 treatment should be used for two years in succession. It is pointed 

 out that T. argyrospih (fruit-tree leaf-roller) is frequently confused 

 with T. rosaceana (oblique-banded leaf-roller), which greatly resembles 

 it in the larval stage, though the adults are easily distinguishable. 



Ferris (G. F.). Notes on Coccidae. II. (Hemiptera). — Canadian 

 Entomologist, London, Out, 1, no. 10, October 1918, pp. 323-332. 



Many species of Coccids have been included in the genus Sphaero- 

 coccus that do not properly belong to it, and the author erects two new 

 genera aUied to Kimanina, Ckll. These are EhrJiornia, which includes 

 E. (Sphaerococcus) cupressi, Ehrh. , and E. graminis, sp. n. , found in 

 cracks and beneath scales on the root stock of an undetermined species 

 of perennial grass in California, and Paludicoccus, of which the type is 

 P. (Sphaerococcus) disticlium, Kuw. 



Callococcus is another new genus founded for C. (Sphaerococcus) 

 pulchellus, Mask., and Mycetococcus is erected for M. (Cerococctts) 

 ehrJwrni, Ckll, and M. (Cerococcus) corticis. Towns. Pollinia ovoides, 

 Ckll. , is placed in the genus Cerococcus. 



Yamada (Y.). Mlnami Manshu ni okeru Kansai no Gaichu. [Insects 

 injurious to Beet in South Manchuria.] — Nojishikenjo Iho. 

 [Bulletin of the Agricultural Experiment Station], Koshurei, South 

 Manchurian Railway Company, no. 4, April 1, 1918, 32 pp., 

 3 plates, 1 map. 



This report records the injurious insects obtained from beet gardens 

 along the lines of the South Manchurian Railway Company from June 

 to the autumn of 1917. 



The following insects are described : — Agrotis ypsilon, Rott., 

 burrows one or two inches into the ground near the root by day and 

 attacks the leaf-stalks at night. Plants may be protected, from it 

 by means of trenches in w^hich pans containing petroleum are placed. 

 Agrotis tokionis, Butl., is also present but is less injurious. Laphygma 

 exigua, Hb., passes the winter underground in the pupal state, the 

 adult appearing and ovipositing in the following spring. The eggs 

 are laid mainly on the under-side of the leaf in masses of 30-80. The 

 young larvae are gregarious at first, but later become scattered over 

 both surfaces of the leaves. When present in abundance, whole 

 fields may be entirely defoliated. The adult beetles of Aserica (Serica) 

 orientalis, Mots., appear in the middle of May and continue to be 

 injurious until July, when they gradually disappear. They hide 

 during the day under the plants or in the ground and begin to feed 

 about 5 p.m. Rotation of crops is the best remedial measure. The 

 grubs of a species of Holotrichia attack the root of young beets about 

 3 inches below the surface. An undetermined Elaterid, which passes 

 two or more years in the larval stage, attacks the root. When mature, 

 it pupates in the soil. The adult appears in May or Jime, the eggs 

 being deposited in the ground. This formidable pest may be trapped 



