246 THE ENTOMOLOGIST. 
This soon began to move from the leaf, descended the branch, and 
eventually tried to hide between the stem and the wall (to which 
the tree was fastened). Seeing it did not intend to make a further 
start I boxed it, brought it home, and fed it with much care, 
thinking I should know something of the life-history of MW. olerum. 
The larva of the ichneumon became a pupa on June 14th, and 
the imago appeared on the 29th; but to my surprise out came 
Casinaria vidua, Grav. No doubt that MW. olerwm, who is a hyper- 
parasite, having found that the A. grossulariata was infested with 
the larva of a Casinaria, tried to deposit her egg in the Casinaria 
larva, but by some mishap it did not reach the intended destina- 
tion. I have bred several Casinaria vidua this season from 
A. grossulariata, and two Mesochorus fulgurans, Hal. This is a 
hyper-parasitic species, and I do not think there can be the 
slightest doubt but that it was a parasite of C. vidua. I have 
arrived at this conclusion from the fact that they came out of 
C. vidua pup, and thereby showing that M. fulgurans did not 
complete the entire destruction of C. vidua until it had spun its 
cocoon, which is of an oval shape, and has the appearance of 
coarse brown paper, the apices brown, followed by a blackish 
zone; the centre portion, which occupies one-third, is brown. I 
also bred Mesochorus sericans, Curt., which is hyper-parasitic on 
the larva of the T'achinide, and, like the above-named species, 
does not consume its victim until after it has changed into pupa; 
therefore there cannot be any doubt but that it is hyper-parasitic. 
IT have bred one Ichnewmon trilineatus, Gmel., to-day; this, after 
true Ichneumon fashion, did not form a cocoon itself, but emerged 
from the pupa of A. grossulariata. From these larve I also bred 
several dipterous parasites belonging to the T'achimd@; these, 
Mr. Meade tells me, are all specimens of the variable and common 
EKzorista vulgaris, Fall. Last year I bred an undetermined species 
of Mesochorus and an Apanteles; the former, without doubt, is 
hyper-parasitic on the latter, as it emerged from an Apanteles 
cocoon. I have again bred both this year from Vanessa cardut. 
—G. C. Bianeti; Stonehouse, Plymouth, August 14, 1880. 
Harvest-MEN (TRomprprum PHatAnett). — In a back number 
of a Natural History Monthly there is an extract from Gosse’s 
‘Tenby,’ which refers to “those long-legged cousins of the spiders 
that are familiarly called harvest-men.” Are these creatures 
really not spiders; and if not, what are they? ‘The long-legged 
