LEPIDOPTEROUS INSECTS. 97 
olfactory organs of the males at a great distance, who, 
when attracted, are stimulated to overcome every 
obstacle in the way of the fulfilment of the great law 
of nature. After the female has become gratified, 
this effect appears to cease. ‘ 
“« Precisely similar circumstances took place with 
the Phalena neustria, (Crimson and Gold Moth,) 
the males presenting themselves at the window.” 
Professor Rennie asserts that this does not always 
succeed ; for, says he, “ In the spring of 1830, we 
bred a female of the Lime-hawk Moth, (Smerin- 
thus Tilice of Latreille,) and placed her on a small 
lime-tree, planted in a garden-pot, and left her at 
full liberty, trusting to the known stationary habits 
of female insects for not losing her. In this we were 
not deceived ; for though the tree consisted only of 
a single stem, of about three feet high, she never 
left it, remaining upon the same leaf sometimes for 
several days without stirring ; and when she did 
move, it was only to perambulate the plant, agitating 
her wings the while, (as she did while stationary, ) 
with a sort of tremulous quivering, not very percep- 
tible, unless closely inspected. It might be that 
there were no males in the vicinity, though the in- 
sect is by no means rare around Lee. At all events, 
she remained without a male for about three weeks, 
as the eggs, which she at length laid, proved to be 
infertile ; and she died soon after. In the instance 
of a much rarer insect, the Clear Under Wing, 
