654 



Large Larch Saw-Fly. 



[dec, 



Windermere District. — North. Between Rydal Water and Grasmere (p.),* W. 

 side of Grasmere (d.p.), Elterwater (p.), Skelwith Bridge (p.), S.W. of Clappersgate 

 (p.), near Lady Park (p.), about Bam Gates Inn (p.), Black Crag plantation (p.), 

 near Borwick Lodge (p.). East. Garburn Pass (p.), Troutbeck (p.), Borrans (p.), N. 

 of Staveley (p.), Long Sleddale (p. ). South. Near Newby Bridge. West. Esthwaite 

 Water, E. side (p.), Sawrey (p.), Claife Heights (p.), Grizedale (p.). 



'Coniston District. — East. Heald Brow plantation (p.), Coniston Moor planta- 

 tion (p.). North. Waterhead (p.), High Cross plantation (p.), Hawkshead Hill (p.). 



The Langdales. — Chapel Stile (p.), plantations on N. and W. sides of Lingmore 

 Fell, N. of Great Langdale Beck and near Mill Beck (p.), Blea Tarn (p.), N. of Little 

 Langdale Tarn (p.), plantations on High Park Fell and Park Fell (p.). 



Eskdale and Wastwater. — Eskdale (p.), near Santon Bridge (p.), near Strands (p.), 

 W. of Wastwater (p.), Wastdale and Mosedale (p.). 



Ennerdale District. — W. end of Ennerdale (p.), about Lamplugh (p.). 



Lowesruater. — Larches on S. side (d.p.). 



Lorton Vale. — Plantations along and on W. side of the vale (p.), W. of Low 

 Lorton (d.p.), Whinrigg plantation (d.p.). 



Buttermere. — Plantation, S.W. (v.b.), N.E. plantation (b.), plantation near 

 •Gatesgarth (v.b.). 



Borrowdale District. — Seathwaite (b.), Thornythwaite (v.b.), Rosthwaite (Johnny 

 Wood, &c.) (d.p.), Watendlath (d.p.). 



Derwent Water District. — Lodore (d.p.), Brandelhow Park and Lingholm (d.p.), 

 Keswick (p.), Great Wood (d.p.), Rakefoot Pike (d.p.). 



BassenthwaileLake. — 'N. of lake (p. ). West and South West. Mines (?) planta- 

 tion (b), Combe plantation (v.b.), Hospital plantation (v.b.), Braithwaite (d.p.). 

 South East. Dodd plantation (v.b.), Millbeck (b), Latrig (d.p.). 



Thiidmere District. — North. Shoulthwaite plantation (v.b.), St. John's Vale (p.). 

 East and West. Plantations (b.), chiefly (v.b.). 



Ullswater District. — West. Matterdale (p.) and (d.p.), W. side of lake (p.), 

 Glenridding (p.). South. Hartsop (p.). 



Hawes Water. — Larches at S. end (p.). 



The distribution of the saw-fly and the intensity of the attack will be readily 

 understood from the accompanying map. 



Means of Detection. — If the larvae are present in any number 

 there will be sufficient evidence of their presence in the number 

 of defoliated twigs, which give a brownish winter appearance 

 to the branches when seen from a distance. If the larvae are 

 still young their presence can be detected by the brown and 

 slightly curled appearance of the green leaves near the ends of 

 the twigs, which is due to the young larvae partially devouring 

 them, usually along one side. In the case of larvae occurring 

 at the top of tall trees, if their presence cannot be detected by 

 the defoliation of the twigs of the lower branches, it is generally 

 indicated by the small green cylindrical faecal pellets which 

 may be found round the base of the tree ; these are figured in 



* Note. — (p.) indicates that the insect was present, though in such small numbers 

 that its presence would not be noticed by an untrained observer, (d.p. ) in these 

 plantations or groups of trees the insect was distinctly present, (b.) indicates that the 

 trees were badly attacked, and (v.b.) indicates that the attack was very bad, the trees 

 being completely defoliated. 



