Hymenopterous Parasites of Coleoptera. 27 
85. Rhagium bifasciatum, Fab. 
There are, curiously enough, no records of hymeno- 
pterous parasites of this common species. In April 1900 
Mr. F. H. Day sent from the Carlisle district (Orton and 
Durdar) to Mr. Morley both sexes of Mitroboris cornuta,”® 
Ratz., with the following note: “They were bred from fir 
logs, in which Rhagiwm brfasciatum was feeding; I have 
just bred another pair from cocoons—the cocoons from 
which Jitroboris emerged were their own and not those 
of Rhagivm; taken 18th March, 1900. I fancy it is 
not uncommon here, baving during the last few years 
repeatedly noticed similar cocoons in the Lhagiwm 
burrows.” 
86. Rhagiwm indagator, Fab. 
Ratzeburg (Ichn. d. Forst. 11, 212) says this northern 
species is preyed upon in the Hartz Mountains by Yorides 
wrigator > (11, 105)—copied by Taschenberg (Zeits. Ges. 
Nat. 1863, p. 800) and Tosquinet (Ann. Soc. Belg. 1897, 
p. 322)—Spathius Radzayanus whose cocoons were found 
in its burrows (11, 48) and Bracon leucogaster * which was 
bred from it by Bouché (i, 45); this last is probably 
synonymous with Celoides initiator, Fab., which Marshall 
records (Bracon. d’Kurop. i, 222) from the same _ host, 
whence Bouché also bred Bracon initiator. 
87. Rhagiwm inquisitor, Fab. 
This common species is preyed upon by another kind of 
Xorides, filiformis,” according to Wissmann (Ichn. d. Forst. 
ul, 105—copied like the last species), who notes that the 
parasite constructs a disproportionately elongate cocoon 
and is not confined to the present host. 
88. Rhagium mordax, Fab.* 
Brischke writes (Schr. Nat. Ges. Danz. 1880, p. 129), 
under [schnoceros rusticus, Grav., “ Aus Larven von Rhagvwm 
mordax .... erzogen.” 
89. Leptura scutellata, Fab. 
Both sexes of Histeromerus mystacinus have been bred 
by Mr. Horace Donisthorpe, from a mass of their own 
cocoons, which emerged from a cocoon of L. scutellata, 
found in Epping Forest in May 1906. 
