852 EXPERIMENT STATION RECORD. 



lice. It was fontid that during a period of 10 days each larva ate on an average 

 2GT plant lice daily. 



A fungus parasite of orange scale, L. Trabitt (Bill. .\</r. Ahjrilc ct Tiiiiisic, 

 13 {1001), ]\o. 2, pp. 32, 33). — An examination of diseased orange scales showed 

 the presence of a number of parasitic fungi, among which was one which the 

 author descril)es as new, under the name Microcera parlatoriw. 



The occurrence of Tomicus dispar on apple trees, G. Ihssen (Pralt. Bl. 

 Pfiaiizeiihau u. Hcliutz, n. ser.. 5 (1901), 'No. 2, pp. l-k-18, figs. 2). — Attention is 

 called to a number of cases in which the attacks of this insect caused the death 

 of Infested trees. In such cases small holes were observed in the bark from the 

 larger branches down to the base of the trunk. In combating this pest the 

 author recommends the removal and destruction of infested branches and the 

 planting of oak trees for trapping female beetles. 



Acariosis of grapes, G. Scalia (Acarosl dcUa Vile. Ciitiniia: Monaco cC- 

 Mollica, 1906, pp. 15). — A disease of gi*apes is described in which the berries 

 when nearly mature show a dirty white or grayish color and are covered with 

 minute incrustations of-jigreenish or browjiish color. 



An examination of aliased grape berries showed the presence of a mite 

 which was identified as Glucijphac/iis spinipes. This mite is described and notes 

 are given on its biology. Since the mite may be found at some seasons of the 

 year In the bark of the grapevine, it is suggested that all cuttings used for graft- 

 ing should be scraped and treated if they are suspected of being infested and 

 that infested trunks be treated with extract of tobacco or some similar insecti- 

 cide. 



Insects attacking the wood of grapevines, Y. Ma yet (ReiK Tit.. 27 (1907), 

 Nos. 681, pp. 8-11; 682, pp. 36-1,0; 683, pp. 63-67 ; 681,, pp, 98-102; 687, pp. 179- 

 185, figs. 17). — This is a practical article prepared for the use of vineyardists in 

 combating insects which attack the stems of grapevines by boring or otherwise 

 injuring them. The insects discussed in the article include species of Cicada, 

 Cossus, white ants, tree crickets, Clytus, Agrilus, Apate, etc. Each species is 

 described and notes are given on its habit and life history. 



Bark beetles, O. Nusslin (Verhandl. 'Natiirw. Vci: Karlsruhe, 19 (1905-6), 

 pp. .'i9-6J,). — A description is presented of the habits of some of the species of 

 bark lieetles with notes on their life history and the injury caused by their 

 operations. 



The generations of bark beetles, E. Knoche (Ztsclir. Forst v. Jagdic, 39 

 (1907), A'o. 1, pp. 1,9-53). — The factors which influence the length of the life 

 cycle of bark beetles are discussed with particular reference to Tomicus typo- 

 grapliiis. 



Some insects injurious to forests. Additional data on the locust borer, 

 A. D. Hopkins (U. 8. Dept. Agr., Bur. Ent. Bui. 58, pt. 3, pp. 31-J,0). ^This 

 Is a partial revision of part 1 of Bulletin 58 (E. S. R., 18, p. 159). 



On the life history of Termes gestroi, E. P. Stebbing (Indian Forester, 33 

 (1907), No. 1, pp. 6-12, pis. 2). — Ternics gestroi is proving to be a serious pest 

 of the Hevea rubber tree. It appears that the white ants burrow under ground 

 from one infested tree to another, producing tunnels through the trunk of the 

 tree and hollowing it out from the crown of the root to a height of 7 ft. or 

 more. In cases where an attack is made upon the bark from the outside, the 

 surface of the trunk does not become covered with rubber as would perhaps 

 be expected. On this account the author believes that the ants either eat or 

 carry away the latex which exudes into their tunnels. 



The utilization of cockchafers, K. Eckstein (Ztsclir. Forst v. Jagdw., 39 

 (1907), No. 1, pp. J,J,-',9). — In some localities where school children receive a 

 f;mall bounty for the collection of cockchafers, these insects have been collected 



