S82 EXPERIMENT STATION KEOORD. 



species discussed are new to science and (he material contained in tiie volume is as a 

 rule oriirinai, with tlu^ ohservations of the author and his correspondents. 



Atlas of forest entomology, E. Henry (.1^/a.s (I'mloiiiolotjir forrsturt'. I 'aria: 

 Jirrijir-Ln'nddl i(- Co., 190S, 2. ed., p]>. ">'!, ;>/.s'. 4^'). — Illustrations are given of a large 

 numlxT of forest insects helonging to tlie various orders of insects, together with 

 explanatory notes relating to these s])ecies. 



The pine beetle (Hylesinus piniperda) {Btl. Agr. lL(jiicl(jn], Lmjlet HI, jtji. (J, 

 y/r/.s. ;?). — This is said to be one of the most destructive of forest insects in England. 

 The pest is described and notes are given on its habits and life history. In combat- 

 ing it, it is recommended that certain trees be left as trap trees upon w hich the eggs 

 are depositeil and which may be destroyed together with the inspects. 



Tree borer {Jour. Dept. Agr. Went Anstralia, 7 {1903), No. 6, pp. 440, 441, fig. 1). — 

 Notes on the injuries suffered by eucalyptus from the attacks of insects Ijelonging to 

 the genera Phoracantha and Stigmodera. 



Two insect pests, E. A. Cooley {Montana Sta. Bui. 46, pp. 107-118, figs. 2). — 

 Notes are given on the rosebud curculio {Rhyndutes hicolor) , which causes injury to 

 roses in various parts of the State. The beetles appear in June and continue until 

 the latter jiart of August. The eggs are generally laid in the rosebuds. In some 

 cases hand picking is sufficient to secure relief from this insect, but jarring and sjjray- 

 ing with Paris green are also recommended. 



A sawfly {Pontania bozcmani) which folds the leaves of poplar is saiil to have been 

 steadily increasing in numbers for several years. The insect appears to be native to 

 the State. The adult hibernates among the leaves on the ground and emerges in 

 ]\Iay to lay its eggs on the young leaves. In combating this species it is recom- 

 mended that the leaves be gathered and burned in the fall and that the trees be 

 sprayed in July and August with Paris green or arsenate of lead. 



The greenhouse aleurodes (Aleurodes vaporariorum) and the strawberry 

 aleurodes (A. packardi), A. W. ]\1orrill {Masmclmsdts Sta. Tech. Bui. 1, pp. 66, 

 pis. 6). — An elaborate account is presented of the systematic position of the genus 

 Aleurodes and methods of study. 



The greenhouse aleurodes is described in detail in all its stages and notes are given 

 on its life history and habits. The eggs hatch within from 10 to 12 days. During 

 the last few days of the pupal life the insect does not feed or increase in size. Experi- 

 ments made by the author indicate that unfertilized eggs may hatch and develop 

 into adult males. The adult life of the insect may extend over several weeks. Notes 

 arc given on the origin, distriliution, food plants, and economic importance of this 

 species. Before starting crops in greenhouses in the fall it is recommended that all 

 weeds and other vegetation sh(juld be removed from the house. 



Experiments were made with a large number of insecticides in coml)ating this 

 insect. Contact insecticides were found to be destructive to larvie and young pupfe, 

 less so to mature insects, and quite harmless to eggs. Lemon-oil insecticide was easy 

 to prepare, but was too expensive; laundry soap was found to be cheap and fairly 

 effective; Stott's fir-tree-oil soap was altogether too expensive for use; kerosene emul- 

 sion proved to be cheap and effective, while Permol kerosene soap was too expensive; 

 Bowker's tree soap Avas found to be cheap and the most effective of all the contact 

 ■ insecticides; whale-oil soap was almost equally effective. 



A number of materials were used for fumigation, including Nicoticide, Bush's Best 

 Brand Fumigating Compound, Thriiiscide, carbon bisulphid, and hydrocyanic-acid 

 gas. The last named substance jiroved to be cheapest and the most effective of all 

 materials used in fumigation. Carbon bisulphid required long exposure in order 

 to secure good results and is considered too expensive. While fumigation with 

 hydrocyanic-acid gas is recommended as the most effective in.'<ectic-ide treatment, this 

 may be combined with syringing with contact insecticides. 



The strawberry aleurodes was long considered identical with the greenhouse aleu- 

 rodes. This species is described in its various stages, and notes are given on its life 



