ECONOMIC ZOOLOGY ENTOMOLOGY. 855 



In this paper the author has brought together the present knowledge of the 

 pest, including technical descriptions of its stages, distribution, injuries and 

 habits, natural enemies, and methods of control. Two ichneumonid parasites. 

 Ichneumon extrematis and Sargaritis sp., and an undetermined tachnid have 

 been reared from tliis species. 



As regards remedial measures hand picking has thus far given the best re- 

 sults since arsenate of lead, used in a strength sufficient to kill the caterpillars 

 appears to leave a white deposit on the plants, and hellebore scalded the foliage. 



An unusual parsnip pest, J. W. H. Habrison (Entomologist, 46 (1913), No. 

 597, pp. 58, 59). — Depressaria heracliana is reported to have been the source of 

 considerable damage to seeding parsnip plants at North Durham during 1912. 

 The flowers and immature seeds were spun together in huge masses through 

 which silk-lined tunnels passed in all directions. In many cases the plants were 

 killed before the seed was produced. 



The silkworm, E. Fauch:6ee (Bui. Econ. Gouvt. G^n. Madagascar, IS (1913), 

 I, No. 1. pp. 92-111; abs. in Rev. Appl. Ent., 1 (1913), Ser. A. No. S. pp. 286, 

 287). — This is a discussion of the silkworm as related to Madagascar and 

 Reimion, including rearing methods, diseases, etc. 



It is pointed out that monovoltine breeds of silkworm (Bomftr/.i; mori) when 

 introduced into Madagascar become polyvoltine after a certain time and that, 

 vice versa, polyvoltine strains introduced into Europe become monovoltine. 

 Results obtained in the interior of these islands indicate that accUmatized 

 strains produce 5 or 6 generations annually when properly cared for, and pro- 

 duce silk of a quantity and quality equal to that obtained from French silk- 

 worms. Berocera madagascariensis is attacked by a tachinid related to the 

 oriental silkworm parasite. 



On a bacillary septicemia of caterpillars of Arctia caja, F. Picard and G. E. 

 Blanc (Compt. Rend. Acad. Sci. [Pans], 156 (1913), No. 17, pp. 1334-1336).— 

 The caterpillars of this moth, which were extremely abundant in vineyards in 

 the south of France in 1912, are said to have been largely destroyed by two 

 diseases, one due to Empicsa aulicce, the other to a new coccobacillus (Cocco- 

 hacillus c^ajw) which is apparently allied to the species (C. acridionim) found 

 by d'Herelle to destroy locusts in Mexico (E. S. R., 26, p. 246). 



When the caterpillars ingest or are inoculated with C. caja; they die at 

 25° C. in from 12 to 24 hours, or at 15° in about 3 days. The mortality which 

 rapidly follows the ingestion of cultures of this organism suggests a practical 

 application in combating this pest. The caterpillars of the brown-tail moth 

 appear to be very susceptible to the infection, dying in from 24 to 48 hours 

 following inoculation. 



The rose slug- caterpillar (Euclea indetermina), F. H. Chittenden (U. 8. 

 Dept. Agr., Bur. Ent. Bui. 124, PV- 9, fig. 1). — This is a summarized account of 

 the present knowledge of E. indetermina, which is a source of injury to the 

 rose and young trees and shrubs. Arsenicals will control this insect. 



New parasites of the cacao moth and parasites in general, W. Roepke 

 (Meded. Proefstat. Midden-Java, 1912, No. 5, pp. 21, pi. 1; abs. in Rev. Appl. 

 Ent., 1 (1913), Ser. A, No. 2, pp. 56, 57). — The author reports the discovery of 

 3 parasites of the cacao moth (Acrocercops cramerclla) in cacao plantations in 

 Assinan. Previous to this time no parasites were known to attack this pest. 



The potato-tuber moth, F. H. Chittenden ( U. S. Dept. Agr., Farmers' Bui. 

 557, pp. 7, figs. 4)- — This is a revised and amplified account, based on Circular 

 102 of the Bureau of Entomology (E. S. R.. 28, p. 355). 



[The potato tuber moth in Victoria], G. Seymour (Jour. Dept. Agr. Victoria, 

 11 (1913), No. 3, pp. 172, 173, figs. 2).— During 1911-12 the injury by the potato 

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