1871.} 958 
eaten or sucked out at all; the intestinal contents of the C. neglecta 
were greyish-green. In this instance, the cell must have remained 
open for a day or two until the spinipes larva was hatched, not an 
unfrequent circumstance, probably because the weather prevented the 
mother wasp from completing her tale of green grubs, and the cell 
must have been visited by the C. neglecta to lay her egg after the 
hatching of the O. spinipes, after which the cell was completed and 
closed by the wasp. On June 9th, I found with the larva of C. neglecta 
an egg-shell of spinipes, and a dried and empty skin of spinipes larva 
which suggested to me at the time, that the larva of spinipes had been 
sucked out by that of neglecta,—a conclusion which further observation 
has led me to reject. On the same day, I found an injured egg of 
spinipes with a young larva of neglecta. 
I find, therefore, that the young larva of neglecta occurs beside the 
injured egg of O. spinipes ; but that the amount of growth of the larva 
of neglecta is not sufficient to explain the loss of bulk of the spinipes 
ege or larva; that its intestinal contents are derived from the green 
grub and not from spinipes ; and that the remains of spinipes, when 
found, although injured and more or less dried and shrivelled, appear 
not to have had the fluid sucked out; and I conclude that the injury 
to the egg or larva of O. spinipes is inflicted by the ovipositor of 
C. neglecta at the time of oviposition. 
The egg of C. neglecta is almost exactly 1 millim. in length and 
rather less than .5 millim. in diameter; it is ovoid in shape, one end 
tapering rather more than the other, and, though the cross section is 
circular, one side is a little more curved than the other; this tendency 
to the curved form so marked in spinipes’ egg is so slight as only to be 
detected on close observation; the egg is of a pearly whiteness. 
Though we have sufficient proof that the eggs of C. neglecta and C. 
ignita hatch under their usual conditions within a few hours of being 
laid, this egg enclosed in a pill-box and kept damp, though taken on 
the 13th, did not hatch until the morning of the 16th ; on the 19th, 
the larva cast its first skin; on the 22nd, it cast its third skin (the 
date of the second not being observed, though the cast skin was 
found) ; on the 24th, it had cast a fourth skin. It appeared full-fed 
on the 28th; but did not begin to spin until July 4th. I have already 
said that I did not place it in a proper cell, and the cocoon was not 
characteristic of either neglecta or ignita.—a larva left in this way in a 
pill-box merely spinning a flattish web or platform of silk, and the want of 
a proper cocoon no doubt leading to its death. It was fed on green grubs. 
Hereford : January, 1871. 
