THE CANADIAN ENTOMOLOGIST. 59 
2. All monomial collective names should be derived from the Greek, 
and have a plural form. 
3. Only the surname of the author who first proposed a group need 
follow its name, whether the group be used in its original orin a modified 
sense ; but when it is desirable to indicate at the same time its recognized 
altered limits, the surname of the writer who first proposed the accepted 
circumscription may follow in a parenthesis. 
In systematic nomenclature, the object is to register titles, not to 
gratify pride, and the names of authors are appended for convenience, not 
fame ; the question of justice or injustice has no place here; and yet the 
above recommendation ought to be satisfactory to those who view this 
matter in a different light. 
NOTES PROM (THE EAST. 
PIERIS RAP#.-—The yellow variety of this butterfly occurs here every 
summer, from the commencement until the end of the season; what I 
have seen of them were of a delicate sulphur yellow. I netted all that I 
met with, but never found a yellow female on the wing. In July, 1870, I ' 
had a pot of mignonette growing on my window-sill, and observed a zw/efe 
female Rape laying eggs on it. I reared seven or eight of the caterpillars, 
feeding them on mignonette, and they all assumed the pupa state ; after 
the butterflies had emerged, a friend unfortunately opened the box and 
some of them escaped before I had seen them. When I examined the 
box there were five yellow females remaining in it. They had the dark 
markings very strongly produced, as the later broods generally have ; not 
knowing at the time the scarceness of the yellow females, I did not preserve 
them, and I have not seen one since. I believe, with the exception of 
one reared by Mr. Bowles at Quebec, it is the only instance on record. 
Last spring I found some chrysalids of rapæ containing parasites, but did 
not succeed in breeding them, as the change from the cold of the open 
air to the warmth of the house killed them. Last summer vafe was very 
abundant here, and now the chrysalids may be seen in great numbers sus- 
pended to the fences about the city. The parasite has increased 
wonderfully dnring last season, for nearly all the chrysalids that I have 
seen this year are infested with them. I do not think that more than one 
in fifty has escaped their attacks.—F. B. CauLFIELD, Montreal, P. Q. 
MacroBasis Fasricii.—This beetle was very numerous here last 
season, and did a considerable amount of damage to the potatoe vines ; in 
