Hymenopterous Parasites of Coleoptera. 67 
269. Pityogenes bidentatus, Herbst. 
Ratzeburg records from Bostrichus bidens, Bracon Midden- 
dorfii” (Ichn, d. Forst. 11, 33), bred by Hartig with one 
small f of Spathius brevicaudis (11, 43); Pteromalus bidentis 
(11, 205), a unique and broken specimen by Nordlinger, 
who had labelled one Hntedon geniculatus (ii, 160): “ Out 
of Bost. bidens from the Black Forest.” He adds later 
(il, 249) Bracon Hartigi ®° (au, 82), of which Ratzeburg 
says that he bred this beautiful and rare insect from 
Weymouth pine, filled with 2B. bidens, together with 
Roptrocerus xylophagorum; B. labrator, B. palpebrator 
(iu, 38), by Nordlinger ; Péeromalus guitatus (iii, 236), bred 
from fir wood by Herr von Bernuth with P. suspensus, 
P. virescens *"° (iii, 243) bred from firs infested by this borer ; 
and P, azwrescens (ii, 235), also bred by von Bernuth from 
B. bidens in Pinus strobus; as well as, doubtfully, P. sicca- 
torum (ili, 240), Husandalon abbreviatum, HE. tridens (iii, 
200) and Bracon hylesini.”® Giraud has also bred Pteromalus 
guitatus, Roptrocerus xylophagorum and Dendrosoter Perisit, 
Gir., from this species in France. 
270. Pityogenes chaleographus, Linn. 
Pteromalus abieticola was raised by Radzay (Jib. cit. ii, 191) 
from Bostrichus chalcographus in the spruce woods of the 
Hartz. 
271. Xyleborus monographus, Fab.* 
The only parasite, instanced by Ratzeburg, of Bostrichus 
monographus is Ceraphron radiatus,*? of which Herr Wiss- 
mann (Ichn. d. Forst. 11, 141) bred a single specimen. 
272. Undetermined Coleoptera. 
Several of both sexes of Caloides melanotus, Wesm., 
“ from some wood-boring beetle ” (Marshall, Ent. Ann. 1874, 
p. 144). Nordlinger found Hemiteles thoracicus, Ratz., in 
a breeding cage containing xylophagous Coleoptera (Ichn. 
d. Forst. 11, 156); Rogas rugator* is said (J. c¢. ii, 66) to 
have occurred in the same situation. Brischke (Allge- 
meine Wirths-Tabelle) has bred Sigalphus floricola, Ptero- 
malus Dahlbomi and Entedon xylobius “from coleoptera.” 
Alysia manducator, Panz., “bred from larva found feeding 
on carrion” (Bignell, Trans. Devon. Assoc. 1901, p. 685— 
ef. Creophilus, ante). LRhyssalus indagator, Hal., “ parasite 
