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 our 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 reference 
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 contcnted myself with referring to such 
previous discussions, except where the reports in which they were 
published are out of print. 
A. INSECTS INJURIOUS TO THE LEAF AND LEAF STEM. 
1. Eating away the tissue of the leaf. 
* Exposed Insects. 
Tue Mascn Ber, (Osinia canadensis, Cresson.) 
Order Hymenoptera. Family Apipm. 
I notice this insect here on the strength of a paragraph by Mr. 
Wm. A. Saunders, contained in the report of the Entomological 
Society of Ontario, for 1872. <‘‘This,” he says, ‘is the name of a 
small hymenopterous insect, a sort of wild bee, which has proved 
destructive to the foliage of some strawberry plants during the past 
season, in the township of Oxford. 
In both sexes, the head, thorax, and abdomen is green, and 
more or less densely covered with whitish down or short hairs, those 
on the thorax being longest. ‘The wings are hearly transparent,: 
with blackish veins. The female is larger than the male. ‘The 
length ee inch, and the spread of the extended wings about half 
an inch. 
Mr. Pettit says: ‘“‘The insects were taken in Kast Oxford, July 2, 
on a few strawberry plants ina garden. The plants, perhaps nearly 
one hundred in number, had been nearly all denuded of their leaves, 
and a search in the evening having failed to reveal the authors of 
the mischief, I examined them again in the heat of the day, and 
found the little culprits actively engaged in nibbling away the re- 
maining shreds of the leaves. They appeared to chew the frag- 
