THE ENTOMOLOGIST. 857 
to you. This year I have bred a female S. Ligustri, and not 
wanting her as a specimen I allowed her to remain in the 
breeding-cage for some days, during which she laid many 
eggs on the net covering the cage. I thought, of course, 
that they would be unfruitful; but, much to my surprise, 
after a time young caterpillars began to make their appear- 
ance; and although the eggs were all laid during one night, 
they continued to emerge from the 2nd to the 6th of July. I 
have now nearly fifty of them; they have grown already to 
nearly three times their size when they were born. Being 
certain that a male was never near the female that produced 
the eggs, I am quite at a loss to know how and when the eggs 
could have been fertilized; in fact 1 am perfectly puzzled to 
account for it in any way. If you are in want of any of the 
larve send a box, and you shall have them.—Stephen Clogg ; 
East Looe, July 12, 1871. 
In the first line of p. 12 of my ‘ Essay on the Employment 
of Physiological Characters,’ in classification, I have noticed 
that a similar fact to that mentioned by Mr. Clogg has 
already been recorded. In addition to Sphinx Ligustri I 
have enumerated twenty-five well-known Lepidoptera, in 
which perfect agamogenesis has been observed. [am much 
obliged for the offer of specimens, but shall be still more so 
if Mr. Clogg wil] himself continue to observe them, and 
report the result. 
Egg Parasite.—The inclosed letter will explain the nature 
of the (to me) remarkable curiosity contained in the quill. 
Can you tell me the name of the parasite? I shall feel 
obliged if, in the next number of the ‘ Entomologist,’ you 
will record this, with any remarks of your own. No such 
case has ever occurred to me.—‘ Having just read the 
‘Insect-Hunter’s Companion, and seeing that at p. 41 yon 
say that you have heard of eggs being stung, I send you an 
example. I found the inclosed egg on poplar, about June 
20th; and to-day, at five minutes to 2 p.m., I happened to 
look at it, and observed a very small hole in it. This I hoped 
would prove to be the caterpillar; but, to my disgust, “in 
about three minutes a small insect emerged, and a few 
minutes after another; one or two are in the quill with the 
egg, I believe. If yon could kindly tell me what sort of egg 
it was when laid, I shall be much obliged. Last year I found 
