1911 ENTOMOLOGICAL SOCIETY. 15 



An interesting outbreak of the small Curcnlionid beetle, Orchestes rufipes, 

 Lee., occurred locally on willow toward the end of May and during the first 

 half of June. The beetles were first noticed on a large laurel-leaved willow, 

 (Salix 'pentandra, L.), on the Experimental Earm, on May 31; four days later 

 the beetles were more plentiful and by the 15th of June they were quite numerous 

 and their work very noticeable. While the beetles did not do any serious injury 

 their habit of eating small, round holes into the epidermis on the underside 

 of the leaves, destroyed, of course, the beauty of the foliage to a marked degree. 

 In one leaf, which measured 21/^ inches long by 1 inch wide, at its widest part, 

 I counted 339 of these little holes. When standing beneath a tree and looking up 

 among the foliage the work of this insect is very conspicuous. 



The Butternut Tingis {Corythuca arcuata. Say.) At Chelsea, Que., Mr. 

 Herbert Groh found a pretty little lace-bug in large numbers on butternut on 

 June 30, The species answers to the description by Eitch of C. arcuata which 

 appears in "Packard's Eorest Insects." The species is known to occur also on 

 birch, willow and other trees. The injury is done by the insects puncturing the 

 leaves and sucking the juices. 



The Pine Baek Aphid {Chermes pinicorticis, Eitch.) This insect is abund- 

 ant on some white pine trees at the present time near Ottawa. The trunk of one 

 large tree recently under observation is much infested with the aphid, and the 

 patches of the flocculent downy matter give the trunk a very white appearance not 

 unlike snow. A Syrp'hid larva is present in numbers feeding upon the aphides. 



Plant Lice were extremely abundant on shade trees. The large green aphis 

 on cut-leaved birches occurred in great numbers. In the middle of September 

 the trees showed conspicuously the result of the attack. Manitoba maples were 

 heavily infested with plant lice. The Elm Leaf Woolly Aphid was again injurious. 

 The Snowball Aphis rendered unsightly the foliage of many beautiful Virburnums 

 in gardens. 



The' Eall Cankekworm (Anisopteryx pometaria, Harris) was noticed in 

 numbers on basswood and other trees. At the end of May the work of the larvae 

 was very apparent. 



The Birch Leaf Skeletonizer (Buccnlatrix canadensisella, Chamb.). The 

 presence of this insect on cut-leaved birches was apparent in August and Septem- 

 ber; on September 16th some full-grown larvae were seen. The small white pseudo- 

 cocoons, which are made by the larvae as temporary shelters during the time they 

 are moulting, were conspicuous on the leaves. 



Greenhouse and Elower Gardens. 



Of the greenhouse insects which were specially troublesome in the district, the 

 following may be briefly mentioned: 



The Greenhouse Leaf-tyer (Phlydamia ferrugalis, Hbn.) occurred in large 

 numbers in the houses of one of our local florists; roses were chiefly attacked. In 

 the same house, last month, a small black Thrip was doing considerable injury to 

 the buds of roses. The White Ely is troublesome in some houses, attacking a 

 large variety of plants; it was noticed to be worldng particularly on Coleus and 

 Primula. 



In flower gardens the worst insect of the year was the Tarnished Plant Bug 

 (Lygus pratensis, L.). This insect does a tremendous amount of damage almost 

 every year to all kinds of flowering plants. It takes a special delight in destroy- 

 ing the tender buds. 



