HYMENOPTERA, — ICHNEUMONIDE. 143 
latter. M. Boudier describes two species of Braconides (S. G. Gany- 
chorus Hal.) the larve of which burst forth from the abdomens of spe- 
cimens of Barynotus elevatus, and Otiorynchus lignarius, in the imago 
state (which had been pierced with pins for preservation), and which 
spun their cocoons beneath the body of these weevils, attaching them 
to the pins. I have reared Perilitus similator from Orchesia micans. 
Bracon Cis Bouché attacks Cis boleti. A small, pretty, spotted-winged 
Cryptus enters our houses to prey upon the larve of the Ptinide, as do 
also Spathius clavatus and Hecabolus sulcatus ; other species (Hemi- 
teles areator, &c.) also frequent our dwellings, to deposit their eggs in 
the larve of Dermestide, Anthreni, Tine, and other domestic insects. 
Amongst the Hemiptera, the Aphides in particular are subject to the 
attacks of numerous species constituting a genus, thence named A phi- 
dius.* The larve of a great number of Hymenoptera and Dip- 
tera are also subject to their attacks, and Mr. Kirby mentions 
an observation recording the occurrence of a minute species in 
fEshna viatica. Boudier has described a species of Cryptus which 
attacks thelarvaee of Myrmeleon formicarium ; and, which is very 
remarkable, not only are those species of insects which inhabit 
galls and cases liable to be infested by them, but even many of 
those parasitic larvee which are themselves inclosed within the body 
of their victim; thus, two species of Hemiteles and one of Pezoma- 
chus are stated by Mr. Haliday to have been obtained from the cocoons 
of Microgaster intricatus (Ant. Mag. vol. ii. p. 468.). The larva of 
the Ophion moderator Fab. destroys that of Pimpla strobilelle Fad. 
De Geer (Mém. vol. ii. p. 863.) has recorded a singular instance of 
an Ichneumon-larva infesting the outside of the body of a spider, 
which it ultimately destroyed ; and numerous observations have been 
made, in which other species (Pimpla oculatoria, Hemiteles palpator, 
Ichneumon aranearum) deposit their eggs in the cocoon-like silken 
masses inclosing the eggs of some spiders, upon which the larve of the 
parasites feed and undergo their transformations within the cocoon ; 
and Mr. Dilwynn says, “I have frequently observed a small black 
species successively deposit an egg in the abdomen of two or more 
spiders onthe sand hills, and I doubt whether the spider had in any 
case arrived at its maturity. On one of those occasions, I perfectly 
recollect having seen a young brood of dark-coloured spiders on Crom- 
* (See De Geer, tom. ii.; Harris Aurelian, Der Naturforscher, st. 12.) The 
habits of Aphidius Rosz have been admirably described by Haliday in Entomol. 
Mag. vol. ii. p. 98., and by Kirby and Spence. 
