42 



THE CANADIAN ENTOMOLOGIST. 



apprehend that before the close of the season the natural increase of the 

 insect will have extended the mischief throughout the greater portion of 

 Ontario. The prompt action, however, of the Department, in endeavoring 

 to acquaint the agriculturists of the Province with the best remedial mea- 

 sures to be used in this instance, will, we trust, result in effecting a saving 

 of a material portion of the crop, even in the badly-affected districts. In 

 making this Report, we have endeavored to condense it as much as is 

 compatible with the objects we have in view, and to lose no time in 

 placing it in your hands in a plain and popular form. It is intended, in 

 the next annual report of the Entomological Society of Ontario, to give 

 a complete history of the Colorado Potato Beetle from its earliest ap- 

 pearance, with a more detailed account of the mischief it has caused 

 throughout the country ; and also to treat at large of the various other 

 insects injurious to the potato. 



THE COLORADO, OR IO-LINED POTATO BEETLE. 



FIG. 1. 



Colore—^ deep orange; (0) and (c) Venetian red, inclining to cream color; (d) and (?) cream color 



and black. 



1 he accompanying fig. i represents the insect in all its various stages, 

 and will enable the reader readily to recognize it when found ; a a the 

 eggs, which are of a deep orange yellow, and are laid in patches usually 

 containing from thirty to forty on the underside of the leaves ; b b b the 

 larvae at different ages ; c the chrysalis or pupa ; d d the perfect beetle ; 

 e one of the wing cases enlarged, to show the lines more plainly. 



lhe larva, which is at first dark reddish brown, becomes paler and 



