Insects. 9371 
position of these two fins, is remarkable ; at least it struck us as being 
so when we first met with it, and we think so still. 
We would here express our opinion, from some slight differences 
which we can perceive betwixt the true wrasses and our fish, that it may 
yet be deemed necessary, from future investigation, to place it in a new 
or sub genus. In that case a part of the name would of course require 
to be changed ; but until that takes place, if it ever does happen, we 
hold it as Labrus microscopicus, or the microscopical wrasse of the 
Moray Firth. | 
THomAs EpwaArRp. 
On the Occurrence of Pieris Rape in Canada. By G. J. BowLEs, 
Sec. Ent. Soc. of Canada, Quebec Branch. 
Durine the summer of 1863, my first collecting season, I captured 
in the vicinity of Quebec numerous specimens of a butterfly of which 
no description could be found in any work on American Entomology. 
Mr. Couper, to whom I applied for assistance, was equally at a loss 
to determine the species, considering it, as I did, to be indigenous to 
Canada. In order to solve the problem, however, he forwarded some 
specimens of the imago to Mr. William Saunders, of London, C.W., 
who pronounced them to be identical with Pieris Rape, the small 
white butterfly of England, one of the most common and injurious 
lepidopterous insects of that country. In the mean time I had enclosed 
a drawing of the butterfly, together with the wings, to Mr. S. H. Scud- 
‘der, of Boston, Mass., from whom I received a reply, stating that, after 
comparing the drawing and wings with specimens of P. Rape in the 
Museum of Comparative Zoology at Cambridge, he saw no reason 
to consider them distinct; at the same time he desired further investi- 
gation to be made respecting the larva and pupa states of the insect. 
This investigation has been successfully carried out, and places beyond 
doubt the identity of the butterfly with the English P. Rape, thus 
establishing another instance of the transportation of a lepidopterous 
insect across a wide expanse of ocean, and its naturalization in a new 
country,—an instance which, when the evidence is considered, must 
be regarded as the most conclusive on record. 
The identity of the English and Canadian species is thus proved by 
the exact similarity of the two insects in all their stages. That the 
imagines are alike in both sexes, I have on the authority of the gentle- 
men above named; for in Quebec I could have no opportunity of 
