ABSTRACTS. 



761 



Insect Enemies of the Pine in the Black Hills Forest Re- 

 serve. By A. D. Hopkins {U.S.A. Dep. Ayr. {Div. Ent.) Bull. No. 32 n.s. 

 pp. 1-24 ; pis. i.-vii., text figs. 1-5). — The investigations show that vast 

 numbers of the Rock Pine (Pinus ponderosa scopulomm) are annually de- 

 stroyed by an hitherto undescribed bark-boring beetle, Dendroctonus pon- 

 derosa, Hopkins : a small, black species, apparently not much unlike the 

 Pine-borer {Hylurgus piniperda, Lin.) of this country, and, like the latter, 

 it also makes tunnels under the bark. The amount of Pine-trees destroyed 

 by this pest in the Black Hills forest reserve in 1897 is estimated at 3,000 

 acres. Further data furnished by the Bureau of Forestry show that the 

 actual amount of dead timber, as determined by Mr. Griffith and party in 

 a detailed survey of the timber resources of the reserve in 1901, is, "an 

 average stand of 1,956 feet beard measure of bug-killed timber 116,000 

 acres, giving a total of 226,890,000 feet board measure. 



Other allied beetles are discussed and photographs of their borings are 

 also shown. — B. N. 



Insecticides and Fungicides, Methods for the Analysis of. 



By J. K. Haywood ( U.S.A. Dep. Acjr. Cir. No. 10, pp. 1-8).— This paper 

 treats of the various methods for the analysis of the following : Paris 

 green, London purple, copper carbonate, soda lye, tobacco and tobacco ex- 

 tracts, formalin or formaldehyde. — B. N. 



Insects, Injurious, in New Hampshire, 1901. By C. M. Weed 

 (U.S.A. Exp. Stn., Nciv Hampshire, Bull. 90, March 1902).— The 

 enormous numbers of the fly Bibio ctlbipennis caused fear of injury to 

 plants, but this, like the common British Bibio, is an insect that feeds on 

 decaying vegetable matter. The Squash bug (Anasa tristis, De Geer) did 

 considerable damage, but the sudden wilting of the Cucumber is probably 

 due as a rule to the presence at the root of the larvae of the striped 

 Cucumber beetle {Diabrotica vittata, Fabricius). Another insect doing 

 considerable damage was the Elm beetle (Galeruca xanthomelcena 

 Schrank), a new importation into New Hampshire. The San Jose Scale 

 has not yet reached that district. — F.J.C. 



Insects Injurious to Vegetable Crops. By F. H. Chittenden. 

 {U.S.A. Dep. Agr., Div. Entom., Bull. 33, 1902 ; 30 figs.).— An excellent 

 series of articles on insects injurious to vegetables, with illustrations of 

 each species. Some of the articles are noted under their proper 

 headings. — F. J. C. 



Insects liable to be distributed by Nursery Stock. By Prin- 

 cipal Nathan Banks {U.S.A. Dep. Agr., Div. Entom., Bull. Si, 1902 ; 43 

 figs.). — This bulletin gives a list of the insects likely to be distributed on 

 nursery stock, with a figure and short description of each, and notes on 

 the injury caused. The list may be of interest, as such means of distribu- 

 tion are not unknown here, and are well worth guarding against. 



Scale insects : Peach Scale, Oyster-shell Scale. Scurfy Scale {Chionas- 

 pis furfurus, Fitch), species of Aspidiotus including San Jose Scale, and 

 others. Various species of plant-lice (Woolly Aphis, Peach Aphis, Apple 

 Aphis, and Plum and Cherry Aphis). Psylla pyricola on Pears, and the 



