1917] ENTOMOLOGY. 551 



The ash leaf hVfg, Neoborus amoenus, E. L. Dickeeson and H. B. Weiss 

 {Jour. N. Y. Ent. Soc, 24 (1916), No. 4, pp. 302-306, pi. i).— This consists of de- 

 scriptions of the several stages of and biological notes on N. amoenus, which in- 

 jures the foliage of ash trees and has a much wider distribution in New Jersey 

 than previously recorded. 



Notes on cicadas from the TJnited States with descriptions of several new 

 species, W. T. Davis {Jour. N. Y. Ent. Soc, 24 {1916), No. 1, pp. 42-65, pis. 4, 

 figs. 9). — The author notes 15 species of which 6 are described as new to science. 



The identity of Eriosoma querci, A. C. Bakeb {Ent. News, 27 {1916), No. 8, 

 pp. 359-366, fig. 1). — Anoecia querci, which occurs on Cornus, is shown to be the 

 correct name for this aphidid. The species has been found to be distinct from 

 the European A. corni. 



Monarthropalpus buxi in New Jersey, H. B. Weiss {Psyche, 23 {1916), No. 

 5, pp. 154-156, pi. 1). — The European boxwood leaf miner is reported to occur 

 in widely separated parts of New Jersey. 



The susceptibility of the eggs of Aphis pomi and A. avense to hydrocyanic 

 acid gas formation, W. A. Ross {Canad. Ent., 48 {1916), No. 11, p. 367). — The 

 author has found that when fumigated just before or shortly after the buds 

 begin to swell the eggs of A. pomi and A. avence, as well as the San Jos§ scale, 

 on young trees are destroyed by hydrocyanic acid gas, 1 oz. to 100 cu. ft. 

 (1:1:3), when exposed for 45 minutes. 



Notes on the Psammocharidae described by Provancher, with description of 

 a new species, S. A. Rohwer {Canad. Ent., 4S {1916), No. 11, pp. 369-312). — 

 Ccropales foxii from Falls Church, Va., is described as new. 



The shell-bark hickory mealy bug, A. H. Hollingee {Canad. Ent., 48 {1916), 

 No. 12, pp. 411-413). — Under the name Pseudococcvs Jessica the author describes 

 a mealy bug which occurs on hickory at Columbia, Mo. 



Contributions to the knowledge of the Dactylopiinse of Hawaii, E. M. 

 Ehkhokn {Proc. Hatcaii. Ent. Soc, 3 {1916), No. 3, pp. 231-247).— In this paper 

 the author adds five genera, of which two (Phyllococcus and Nesococcus) are 

 new to science, and eight new species, making a total of 25 species of Dactyl- 

 opiin£E for the Hawaiian Islands. 



An investigation of the best methods of destroying lice and other body 

 vermin, J. P. Kinloch {Brit. Med. Jour., No. 2892 {1916), pp. 789-792). — In 

 continuing investigations previously noted (E. S. R., 34, p. 356) the author's 

 experiments have substantiated the report by Bacot (E. S. R., 36, p. 356) that 

 lice do not survive immersion in boiling water, 



"Several insecticidal powders have been tested, and of these N. C. I. powder 

 [naphthalin, 96 per cent; creosote, 2 per cent, and iodoform, 2 per cent] is 

 the most destructive to lice. Of the three constituents of N. C. I. powder, 

 naphthalin and creosote have each a strong insecticidal action. The insecticidal 

 action of iodoform is feeble. Naphthalin appears, so far as my comparative 

 tests have gone, to be the most suitable basis for use in the preparation of a 

 powder destructive to lice. Commercial naphthalin is more actively insecticidal 

 than pure naphthalin, and it appears that the lethal power of naphthalin for 

 lice is dependent; in great part on the presence of hydrocarbons and coal-tar 

 derivatives other than pure naphthalin. The immediate lethal effect of creosote 

 when mixed with naphthalin is less than that of some other insecticidal liquids, 

 but the longer period during which creosote continues to act more than com- 

 pensates for the initial disadvantage. In addition to its feeble insecticidal 

 activity, iodoform greatly increases the adhesiveness of N. C. I. powder for 

 cloth. The inclusion of iodoform in the powder is accordingly justified, although 

 similar adhesiveness of the powder Is obtainable at less cost by substituting 



