100 THE EEPORT OF THE No. 36 



regained their greenness by means of a second growth. I believe, too, that enemies 

 were working among them, as a few specimens were found dead in positions that 

 looked very like the work of a fungus. The sawflies were, however, very widely 

 spread and were collected many miles away from their food plant. 



Another pest which made much progress and did considerable mischief to 

 spruce was the Spruce Sawfly {Lophyrus dbietis). Some trees were entirely 

 stripped of their foliage and being evergreens the appearance and effect is much 

 more lasting than larch sawfly work. The insect itself is also quite different in 

 habit, excepting during the larval stage. The larvae appear in June from over 

 wintering eggs and though varying. in size are nearly all fully developed by the 

 middle of July. They then spin cocoons on the leaves or beneath the branches — 

 not beneath dead leaves or moss on the ground as does the larch sawfly. From 

 these the flies emerge in August, lay their eggs and die before winter sets in. 



Poplar Leaf Beetle {Lina tremulae). Has again become a pest of con- 

 siderable magnitude — very few aspen poplars were free from them and many 

 small ones practically defoliated. During July and August nearly every grove 

 of popl9.rs was tainted by the disagreeable odour given off by the larvae. 



WiLLOvs^ Leaf Beetle [Galerucella decora) again appeared suddenly over a 

 restricted area covering not more than a hundred acres of wood land. They had 

 evidently alighted after one of their usual spring excursions^ — but disappeared again 

 after a few days, so that little injury was accomplished. 



Of otlier woodland pests the larger Poplar borer, Saperda cdlcarata, was per- 

 haps most conspicuous. It seems to confine itself to certain groves which it 

 eventually kills. The most practical remedy is seemingly to cut down and burn 

 all infested trees. 



Among the enemies of live stock may be mentioned an unprecedented out- 

 break of Stable-flies Stomoxys calcitrans, which caused great annoyance to both 

 horses and cattle. It was also troublesome to dogs, particularly to their ears, 

 which were rendered quite raw by the succession of flies that attacked them. 

 Curiously enough, the enormous increase in Stomoxys has been accompanied — no 

 doubt coincidentally— by an almost total disappearance of horse flies which reached 

 their greatest abundance in 1910 when they Avere present in millions. This season 

 even single individuals were hardly procurable. 



The usual mosquito pests, house flies, and those of lesser importance were 

 present, but departed very little from the normal in numbers. 



SOME NEW OE UNRECOEDED ONTAEIO INSECT PESTS. 



L, Caesar, B.A., B.S.A., Guelph. 



Rliagoletis fausta. O.S. On June 22nd of this year I visited a cherry orchard 

 near St. Catharines to see whether any adults of the Cherry Fruit Fly had yet 

 appeared. At this date a few, but only a few early varieties of sour cherries and 

 some sweet cherries were ripening. Montmorencies were still quite green. About 

 100 specimens of R. cingulata were observed. There was no indication of egg laying 

 yet. On my way home I called at another orchard about two miles away in a 

 different direction from the town. While examining some pear trees which formed 



