248 FOREST LANDS OF NORTHERN RUSSIA. 



accompanied by a diagram representing the cambium to 

 the depth of from seven to eight verstchoks ; from the 

 outer circumference proceeded several branching blue 

 lines ; and in the branches of these, at varying distances, 

 were black circular and oval spots. These represented a 

 horizontal slice of the trunk of a Pinus sylvestris ; and the 

 blue ramified lines represented the horizontal course made 

 by the insect, the black spots indicated places at which it 

 departed from, this to take a course more or less vertical]. 

 ' According to my observation,' M. Guenther went on to 

 say, ' the insect never penetrated beyond the cambium. 

 Besides this, old trees were throughout their whole thick- 

 ness entirely destroyed by similar oval vertical openings, 

 produced apparently by the Tetropium luridum! 



SECTION A. COLEOPTERA. 



THE following is a list of Coleoptera, according to Cata- 

 logus Coleopterorum Europae et, Caucasi, auctoribus L. V. 

 Heyden, E. Eeitler, et J. Weise, collected in the Govern- 

 ment of Olonetz by Forst-Meister A. Guenther, Petra- 

 zavodsk : 



' Catalog us Coleopterorum Gubern. Olonetzeus. 



Cicindela campestris, L. C. hybrida, L. C. sylvatica, L. 



Cychrus caraboides, L. 



Melancarabus glabratus, Pk. 



Carabus nitens, L. C. clathratus, L. C. granulatus, L. 

 C. Menetriesi, Fisch. 



Nebria cursor, Mull. N. Gyllenhali, Schh. 



Leistus ferrugineus, L. L. rufescens, Fbr. 



Notiopholus aquaticus, L. N. palustris, Dft. N. bigu- 

 thatus, Fbr. 



Blethisa multipunctato, L. 



Elaphrus uliginosus, Fbr. E. cupreus, Dft. E. riparius, L. 



Tachypus pallipes, Dft. T. flavipes, L. 



Bembidion velox,. L. B. punctulatum, Drap. B. hi- 



