Hymenopterous Parasites of Coleoptera. 9 
from the same host, together with Pezomachus (?) vidwus,”* 
Forst. One is led to wonder whether the latter could 
have been a dimorphic 2 of the same species.” Of H. 
persector, he says (lib. cit. 160), “bred from some pup of 
Gyrinus natator, collected by the Rev. J. Hellins, from 
rushes on the banks of the Exeter canal. It did not, how- 
ever, emerge till later than HL. gyrini (argentatus, Grav.), 
with which it appears to be associated.” 
8. Phlwopora reptans, Grav. 
Morley (Ichn. Brit. 11, 134) took Hemiteles areator in 
February 1899, associating, though perhaps accidentally, 
with this beetle beneath pine bark, near Ipswich. 
9. Myrmedonia collaris, Payk. 
A 2 of Miecrocryptus nigrocinctus was taken in Wicken 
Fen in Cambs., by Donisthorpe, associating with this beetle, 
which it much resembles, in a nest of Myrmica lxvinodis 
(cf. Morley, Ichn. Brit. ii, 42). 
10. Creophilus maxillosus, Linn. 
Marshall writing of the common Braconid, Alysia 
manducator (Bracon. d’Europ. ii, 377) says: “Ona vérifié 
leur parasitisme dans les larves de Lucilia . .. et ce, qui 
semble plus remarquable, dans les larves formidables du 
coléoptere Creophilus maxillosus, L., qui habitent con- 
stamment les cadavres.” We have repeatedly captured 
this parasite on carrion. 
11. Ocypus olens, Miill. 
A beetle-larva, twenty-two millimetres in length, was 
dug up from beneath the surface of the ground in Mr. 
Morley’s garden (Monks Soham House, Suffolk) on 9th 
Sept. 1905. This, there can be no doubt, is that of 
Ocypus olens—as figured by Westwood (Mod. Class. i, 166, 
fig. xvi, 1), since Creophilus feeds in carrion, etc. This 
larva was placed in a chip box and, the following day, had 
become moribund with seventeen hymenopterous larvie 
protruding from its ventral surface. The latter lived till 
October and all assumed the pupal state, the first three on 
28th Sept., of which two (in the fifth segment) alone 
assumed the blackness of maturity. Unfortunately they 
