94 



believe the only member of its genus ever becoming seriouslj^ injuri- 

 ous, is Tettigonia circillata. It is as injurious and in every way 

 entirely replaces the small \'ine hopper in the Santa Clara Valley, and 

 while occurring all over the coast region southward is nowhere 

 troublesome. It differs from the Tvphlocyba in l)reeding in the winter 

 and on other plants as well as on grapes in the suunner time. 



It is not necessar}^ to bring up further examples to show how clearly 

 the distribution and habits of insects depend upon their environment, 

 and the necessity in a region of such diversity as California of making 

 local investigations before having any sound basis for economic 

 practice. 



NOTES FROM CANADA. 



By James Fletcher, Ottawa, Canada. 



The economic entomologist has had full opportunit}" this spring of 

 studying injurious insects in all parts of Canada. Owing to the atten- 

 tion which has been directed to the subject by legislation connected 

 with the San Jose scale and other injurious insects, many people have 

 noticed insect injuries which otherwise would have been overlooked. 



An important concession was made by the federal government last 

 spring in allowing nursery stock to be imported into Canada subject 

 to fumigation in houses specially prepared and in charge of a govern- 

 ment officer. 



Tent caterpillars of the two common species, which during the last 

 three years have been extremely abundant in eastern Canada, were 

 noticeably less destructive. Although many hatched in some places, 

 they disappeared suddenly and few produced the perfect insects. The 

 cause of this sudden disappearance was not detected in most cases. 



Leaf rollers on apple trees were very destructive toward the end of 

 May in orchards along the northern shore of Lake Ontario, the two 

 commonest species being Loplioderus quadrlfmclmui and Caco&cla ros- 

 aceana. Both of these insects are common at Ottawa and have done 

 a considerable amount of harm for several years, but they have been 

 particularly aljundant this summer. In 1891 and 1802 apple trees on 

 the experimental farm were almost denuded in the spring. The larvee 

 of Lophoderus eat the green portions of the leaves, reducing them to 

 masses of dirty white down, the pubescence from beneath the leaves, 

 and fragments of leaves. Another injury to apple trees of some 

 interest which has been complained of this year rather more than 

 usual is an attack upon the flowers by the click beetle Corymhites 

 tarsalis. The beetles eat holes into the petals and destroy the essen- 

 tial organs as well. Mlcropteryxi)omivorella^ usually a rare insect, 

 has been found in considerable numbers in the Niagara district, and 

 specimens have also been sent from Nova Scotia. The curious little 

 cocoons in some instances have been sent in as scale insects. They 



