Forest Insects. 483 



the former, with equal skill and assiduity, has illustrated the Ich- 

 neumones adscili. 



Forstinseclcten, &c. Forest Insects. The Natural History of Insects 

 which prove injurious to Woods. By Professor E. A. RossaiiEs- 

 sler. 1 Vol. 8vo. (100 pages) with a lithographic plate. Leip- 

 sig, 1834. 



This compendious work is one of the few which treats the sub- 

 ject to which it is devoted in a. systematic manner. It consists of 

 25 paragraphs, containing observations on the generalities, the clas- 

 sification, the retreats, the nourishment, and the mode of distinguish- 

 ing insects injurious to trees ; likewise descriptions of the species 

 in their different states, and a detailed account of the injuries they 

 occasion. The author confines his remarks to the species which at- 

 tack forest trees, in strict consistence with the title of his work, al- 

 though it would have added both to the interest and importance of 

 his labours, had he extended them to the fruit department. He ar- 

 ranges his insect species (only twenty in number) in reference to 

 the trees which they attack : — as follows. 



a. Conifers. 



I. Pinus abies. 



a. The young plants : Curculio abietis. 



b. The old trees : Bostrichus typographies ; Hylesinus piniper- 

 da ; Bostrichus chalcographus ; Rhagium inquisitor (less hurtful 

 than the others) ; Sirex gigas. 



II. Pinus silvesiris. L. 



a. The young plants : Tortrix turiona ; Tortrix Buoliana ; Cur- 

 culio abietis. 



b. The old trees. Bombyx pini ; Bombyx monacha ; Geometra 

 piniaria ; Noctua piniperda ; Tenthredo pini ; Bostrichus pinastri. 



III. Pinus picea. L. Bostrichus abietiperda. 



IV. Pinus larix. L. Bostrichus laricis. 



b. Leafy trees. 

 Melolontha vulgaris and solstitialis ; Bombyx processionea ; Bom- 

 bvx salicis. 



