44 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
sawfly as having been the cause of damage to larch in the Harz 
Mountains, in Holland and in Denmark. The references are 
chiefly antecedent to 1840; the most recent is from Denmark, in 
1902. ‘The insect has been recorded in Western Europe, from 
Sweden in the north to as far south as France. 
As regards Britain, Cameron! writes: ‘ ematus Erichsoni 
does not appear to be a common species. I have only seen a 
specimen taken by the Rev. T. A. Marshall, of which I do not 
know the locality. Mr Dale records it from Glanville’s Wootton.” 
Mr C. O. Waterhouse, of the British Museum, courteously writes 
to me: “We have only three examples of VV. Zrichsont in our 
British collection, and unfortunately they have no localities. 
Two are from Cameron’s collection, one from J. F. Stephen’s 
collection.” Mr F. V. Theobald, in Mature of 2oth September 
last, gives as localities, “near Esher, Wye, Great Staughton, and 
Budleigh Salterton.” Completer records would probably show a 
more extended distribution. 
Nematus Erichsoni in America—In the United States of 
America this sawfly has been catalogued as one of the most 
destructive forest insects, the larve, in the North-Eastern States, 
having at different times defoliated the larch. Until about 1882, 
the insect had not been regarded as troublesome. In a Bulletin 
published in 1881, Mematus Erichsoni was passed over, but in 
his next Report,? Packard told how in late August, in Maine, 
the caterpillars of this sawfly partially or entirely stripped the 
American larch or Tamarack (Larix americana) over a consider- 
able area of swampy ground where the tree grew, the ability to 
grow in such a habitat making the tree a valuable one. The 
attack was continued in neighbouring parts in 1883, when again 
many trees were stripped and fatally injured. Similar infestation 
was reported from New Hampshire and Massachusetts. Then 
in Northern New York an extensive area of European larch 
was defoliated. Fletcher? has recorded enormous damage 
to larch in the summer of 1884 in and near Quebec by the 
caterpillars. 
Defoliation of Larch in England.—During the past summer 
‘A Monograph of the British Phylophagous Hymenoptera, vol. ii. p. 57, 
1885. 
* Fifth Report of the United States Entomological Commission: ‘‘ Forest 
Insects,” by Packard, 1890. : 
5 Canadian Entomologist, November 1884. 
