THE CANADIAN ENTOMOLOGIST. 125 
the quantity of sap which each obtains, said quantity being measured by. 
the nature of the shoot, whether succulent or otherwise, the only rational 
conclusion that can be drawn is to consider the sterile form as male. The 
correct course to have adopted would have been a dissection of the 
animal, and a comparison of the organs of reproduction, but in this I was 
debarred by the want of suitable instruments for the purpose. 
From what has been written upon European species, combined with 
“the facts developed in this paper, it seems safe to conclude that the Aphidee 
reproduce both in a sexual and asexual manner. If not sexually, then 
there is no getting rid of the conclusion that in the spring of the year 
three forms of females are produced, wingless virgin, winged virgin, and 
winged sterile females. As a further confirmation of the above facts, let 
me add that similar experiments were performed upon a small drab-colored 
species, which was found feeding upon the leaves and succulent shoots of 
Spiraca corymbosa, with similar results. 
NOTES ON RHYNCOPHORUS ZIMMERMANII, Sc 
BY S. V. SUMMERS, NEW ORLEANS, LA. 
Larvæ, long, 1.07 to 1.40 inch. Head rather large, smooth, vertical ; 
occiput dark chestnut brown ; medial line abbreviated, but well defined ; 
lateral lines complete ; rie piceous, sculptured; front rufo-piceous ; 
mandibles obtuse, opaque, with three large deep impressed punctures ; 
labium 3-dentate ; mentum sinuated, sub-flavous. Body sub-cylindrical, 
not curved, sub-flavous, middle segments largest, humeral and anal seg- 
ments corneous, brownish; legs replaced by six tubercles. 
Described from seven living matured larve 
Pupe, long, 1.10 to 1.24 inch. Quite characteristic of imago, tawny 
yellow ; prothorax and metasternum piceous ; rostrum bent close on pro- 
sternum, and reaching anterior margin of metasternum; elytra enclosing 
posterior legs. ‘Three specimens. 
R. Zimmermanii. Long (exclusive of rostrum), 2.66 to 1.20 inch. 
Black, shining, rostrum shorter than thorax; g nearly arcuate before 
antennæ, smooth, with rather large punctures; @ not arcuate, tuber- 
culate ; antennae with outer half of first joint rufous; eyes large, finely 
