316 THE CANADIAN ENTOMOLOGIST. 



Page 249, first paragraph, elevenih line, read : ''■ Acccleiauon might 

 ordinarily be expected, but this seems not to be the case with this species." 

 At the end of this paragraph insert : " He fully expected, however, that 

 further experience would show a tendency to a second brood at New 

 Brunswick through exceptional individuals, just as there was a tendency 

 to a third brood at Washington." 



Page 245, fourth paragraph, read : " In reply to a question by Mr. 

 Lintner, Mr. Riley stated that at Washington the greater part of the second 

 brood of beetles doubtless hibernated, although some laid eggs for a third 

 or even a* fourth generation." 



Page 250, fourth paragraph, for "species" read "race". 



Page 261, next to last paragraph, my remarks refer to Xenos and not 

 to Polistes, which is mentioned immediately above. 



Page 262, first whole paragraph, read : " Mr. Riley stated that he 

 knew of no other species of Thyridopteryx similar to ephemeraeformis, 

 although this species differed much as to the character of the cases, 

 especially those upon conifers when compared with deciduous trees." 



C. V. Riley, Washington, D. C. 



E.A.RK-BEF.TLE DESTROYER. 



^/r, — The ^a.vk-htt\.\e. Dendroctonus f7ontaIis, Linn., has of late years 

 been committing great ravages among the conifers of the West Virginian 

 forests. In order to offer some resistance to this creature, Mr. Andrew 

 D. Hopkins, Entomologist of the Agricultural Experimental Station at 

 Morgantown, W. Va., has hit upon the expedient of placing in its company 

 an enemy in the European Bark-beetle Destroyer^ Clcrus formicarius, L. 

 For this purpose, Mr. Hopkins recently visited Germany, and here, through 

 considerable skill and good fortune, he secured valuable information con- 

 cerning the conditions favourable to the existence of this useful insect. 

 He has transported the larva of the Bark-beetle Destroyer at various 

 stages of development, as well as the pupa and imago, to America, all in 

 great quantities, and in a state of hibernation. There being reasonable 

 hopes of by far the greater part arriving over there in a healthy condition, 

 it will be possible next spring to begin the experiments of acclimatization. 



Camillo F. Schaufuss, 

 Director of the Museum Ludwig Salvator, Meissen, Germany. 



