44 THE CANADIAN ENTOMOLOGIST. 
Chalcidiae and the Cynips tribe, and though they are now fixed with the- 
Chalcidiae, there is still matter for argument as to their maintenance by 
animal life, or by vegetable life, or as to how they are divided between 
these two means of existence. Nees mentions his discovery of a gall-- 
making Hurytoma, and Girand announces his ascertaining the vegetable 
food of Zsosoma, a fact afterwards observed by Moncreaff, but this genus 
has more importance in the U. States, where Harris, Fitch and others have 
been witnesses of its ravages on corn. But the most interesting part of 
its history is in Canada where a species occurs in grape seeds, and is 
remarkable not only on account of the singularity of its abode, but also by 
the contrariety of the sexes, one of them representing the carnivorous 
Eurytoma, and the other the herbivorous Zsosoma, and thus one species 
figuratively combines the diminishers of vegetation and the controllers of! 
such diminution.  /sosoma is destitute of the metallic hue which is the 
especial ornament of its tribe, but possesses a compact and elegant form, 
a finely sculptured thorax, and a highly polished abdomen. It occurs in. 
Australia, in Amurland, and probably in all the chief parts of the: 
earth. x 
PTEROMALUS.—This genus is the last of the Canadian Chalcidiae, and. 
thereby indicates what a multitude of discoveries in this tribe are yet to: 
be made in Canada. It inhabits all parts of the earth, and the British. 
species are exceedingly numerous. Z?. puparum is the type of the genus 
and has been long known in Europe. The chrysalis of a butterfly affords. 
food and lodging for its young ; it was found formerly near Hudson’s Bay, 
and its appearance in the U. States has been lately a source of gratifica— 
tion, and it can hardly fail of being shortly recognized in Canada, having: 
now the means of making itself known. 
MICRO - LEPIDOPTERA. | 
BY V. T. CHAMBERS, COVINGTON, KENTUCKY. 
Continued from Vol. 5, Pagel5. 
G. eupatoriella. Ante p. 9. Vol. 4. 
The former notice of this species was very brief and imperfect, having, 
as there stated, been made from a single specimen which had been untimely 
nipped from its pupa case. . Since then I have bred and captured other 
specimens. It may be G. Venustella Clem., Proc. Acad. Nat. Sct., 1800. 
