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4II 
DESCRIPTION AND DISCUSSION OF SPECIES. 
On the following pages I have discussed in detail all the insects! 
known to me to be injurious to the strawberry, within oui limits, 
together with a few others to the attacks of which we are liable ;| 
but I have treated each species, as a general rule, with referenced 
to its injury to all the crops which it affects, not confining myself| 
to the strawberry only. 
Whenever a species has been fully discussed in former reports of; 
this office, I have commonly contented myself with referring to suchi 
previous discussions, except where the reports in which they wereji 
published are out of print. 
A. INSECTS INJURIOUS TO THE LEAF AND LEAF STEM. 
1. Eating away the tissue of the leaf. 
* Exposed Insects. 
The Mason Bee, (Osmia canadensis, Cresson.) 
Order Hymenoptera. Family Apid^e. 
I notice this insect here on the strength of a paragraph by Mr 
Wm. A. Saunders, contained in the report of the Entomologica 
Society of Ontario, for 1872. “This,” he says, “is the name of t 
small hymenopterous insect, a sort of wild bee, which has prove*; 
destructive to the foliage of some strawberry plants during the pas 
season, in the township of Oxford. 
In both sexes, the head, thorax, and abdomen is green, an* 
more or less densely covered with whitish down or short hairs, thos 
on the thorax being longest. The wings are nearly transparent 
with blackish veins. The female is larger than the male. Th 
length is .85 inch, and the spread of the extended wings about hal 
an inch.” 
Mr. Pettit says: “The insects were taken in East Oxford, July ‘A 
on a few strawberry plants in a garden. The plants, perhaps nearl 
one hundred in number, had been nearly all denuded of their leaver 
and a search in the evening having failed to reveal the authors c; 
the mischief, I examined them again in the heat of the day, an 
found the little culprits actively engaged in nibbling away the rt 
maining shreds of the leaves. They appeared to chew the frau 
