«b80 161 
ingle egg remaining in it— thxis showing that she must have deposited 
<j far the greater portion of her burden before her capture. 
On 10th September, he shut up another female in the same way, 
rhich also died on the fourth day, without depositing any eggs, and on 
issection was found to contain a quantity of eggs, with shells, but 
lOt fully developed. On ] 6th September, he shut up a third female, 
rhich lived five days, and being then at the point of expiring, was 
•inned to a cork, when she laid three eggs ; on dissection, 160 well- 
eveloped eggs were found in her, and carefully extracted. On 24th 
eptember, a fourth female was shut up ; she died on the third day, 
nd when opened had no eggs in her. 
Of the eight eggs he obtained from the first female, Mr. D'Orville 
•ave me five, which, to my great sorrow, shrivelled up ; from two of the 
emaining three, larvae were produced on September 26th, a period of 
omething less than three weeks having elapsed since their deposition ; 
lone of the other eggs, whether laid or extracted, proved good. 
These little larvje— white in colour, with long, black caudal honis, 
fere put on a growing plant of Convolvulus arvensis, and during the 
oilowing night placed themselves in position on the under-side of a 
3af, and ate little holes through it ; however, they soon died, one after 
Dur days', and the other after ten days' existence. 
To these notes made recently, Mr. D'Orville adds one made in 1859. 
n that year he captured nineteen moths, and from one of the females 
btained a single egg ; the larva from which was hatched on September 
7th, and after feeding ten days on Convolvulus arveiisis, died in its 
xst moult. And on October 13th of the same year he found a larva 
bout one-third grown, in a potato field, on a spot where Convolvulus 
rvensis was entangled with the potato haulms ; it was covered with 
ret dirt, as if it had been in hiding under the earth. A few davs later, 
larger larva, more than two-thirds grown, but dead, was found in a 
imilar situation, and brought to me. 
From these facts Mr. D'Orville draws the following conclusions : 
irst, that the imago, in this respect unlike ^S. Ugu^tri, and the three 
pecies of Smerinthus, does not emerge from the pupa with ova fully 
eveloped, but rather in a very unformed state, and that they become 
radually formed in the body of the female— perhaps after impregnation 
as taken place. And here I may notice that the eg^ of convolvuU is 
ot more than two-fifths of the size of the egg of ligustri, so that even 
.'hen a female has her full number (somewhat between 200 and 250) 
eady for extrusion, she would by no means show so stout a figure as a 
amale of ligustri in similar circumstances. 
