118 Forty-first Report on the State Museum. 



from the same tree, having on them a number of the scales which had 

 unquestionably been attached to them after the fruit had very nearly, 

 if not entirely, attained its full size." 



Upon subsequently visiting the tree, in the garden of Dr. Wool- 

 worth, at that time the Secretary of the Board of Regents of the 

 University of the State of New York, it was found (as also others) 

 badly infested with the scale, and the fruit upon it also infested to 

 the extent of readily inviting attention to its condition. No minute 

 was made of the date of this observation, but it was certainly not 

 earlier than the month of September, and may have been in October. 



A stem taken from one of the pears, bearing a dozen or more of 

 the scales, was placed in glycerine at the time, and is now in the State 

 collection, subject to verification, if desired. 



It must be evident to all who know the habits and development of 

 these insects, that scales found on the mature fruit can only be from 

 a summer brood, and not from that which occurs at about the time of 

 the blossoming of the fruit. 



Is Double-brooded in Canada. 

 At the time of writing the above, I had no knowledge of the scale 

 of this species having been observed on fruit, but the following notice 

 of it has since been published, which shows a double brood for the 

 insect even as far north as in Canada. The authority quoted is, of 

 course, unquestionable. Mr. J. W. Douglass, of Lewisham, England, 

 in a note dated May 12, 1888, upon Mytilaspis pomorum, states: 



Mr. James O'Brien has sent to me an apple, just imported from 

 Tasmania, on which were a dozen of the scales of this Coccid, and he 

 says he has seen some on apples from Australia. * * * j have 

 seen the scales of this species on the fruit of apples grown in Britain, 

 yet rarely, and also on American and Canadian fruit. {The Entomolo- 

 gists' Monthly Magazine, xxv, 1888, p. 16.) 



Remedies. 



If a tree has become so infested with the bark-louse that it has 

 extended entirely over it, even planting itself on the terminal twigs, 

 there are but two ways to deal with it: either cut the tree down and 

 burn it, or spray it thoroughly with some liquid that will penetrate 

 the scales and kill the insect or the eggs beneath. This, a j)i"C)per 

 kerosene oil emulsion, rightly applied, should do. It would better reach 

 the scales when the tree is not in leaf, either in the spring or in the 

 autumn; or if more convenient, it could be attended to in the winter. 

 The oil will readily penetrate the scales and accomplish the desired 

 purpose. 



