186 



FOREST ENTOMOLOGY. 



JSematus (Holcocneme) Erichsonii, Htg. (the large Larch Saw-fly). 



This insect, though fairly common in some parts of this country, is 

 not even mentioned in any English literature relating to forest ento- 

 mology. Cameron writes : l " Erichsonii does not appear to be a com- 

 mon species. I have only seen a specimen taken by the Rev. T. A. 

 Marshall, of which I did not know the locality. Mr Dale records it 

 from Glanvilles Wootton." In German literature Judeich and Nitsche, 2 

 and also Niisslin, 3 only slightly refer to this species. Packard 4 



Fig. 175. 

 a, Cr'cesus septentrionalis; b, Larvrc of Crcesus septentrionalis. (From F. V. Theobald's 

 ' Animal Pests of Forest Trees.') 



reports it as being injurious in some parts of America, and it is also 

 recorded as being injurious in Canada. 5 In 1906 it appeared in con- 

 siderable numbers in Cumberland, so much so that the Board of Agri- 

 culture requested Dr R. Stewart MacDougall to inspect the injured 



1 Monograph of British Phytophagous Hymenoptera, vol. ii. p. 51. 



2 Forstinsektenkunde, Bandi., seite 661. 



3 Leitfaden Forstinsektenkunde, seite 359. 



4 Fifth Report of the United States Entomological Commission. Forest 

 Insects, by Packard. 1890. 



5 Canadian Entomologist, Nov. 1884. 



