306 BRITISH ICHNEUMONS. [ Zrromenus 
1. calcator, Miill. 
Ichneumon calcator, Mill. Prodr. 158. JI. erythropus, Gmel. S.N. i. 2705. 
Tryphon calcator, Gr. I. E. ii. 138; Ste. Illus. M. vii. 235; Ratz. Ichn. d. Forst. 
i. 129; iii. 125. Polyblastus calcator, Brisch. Schr. Phys. Ges. Kénig. 1871, 
p. 94, ¢; cf. Marsh. Ent. Ann. 1874, p.143. BP. carinatus, Holmgr. Sv. Ak. 
Handl. 1855, p. 220; Brisch. Schr. Phys. Ges. Konig. 1871, p. 94; Schr. Nat. Ges. 
Danz. 1878, p 100, ¢. P. oelandicus, Holmgr. Sv. Ak. 1855, p.220, ¢. Er- 
romenus Oelandicus, Thoms. O. E. ix. 904, ¢. E.calcator, Pfank. Zeits. Hym.- 
Dip. 1906, p. 87. 
A nitidulous, black species, with only the legs entirely red and areolet 
wanting. Head not constricted posteriorly, black with mandibles, palpi 
and the apically rounded, distinctly discreted and somewhat impressed 
clypeus, red; face centrally prominent; frons apically subimpressed. 
Antennae a little longer than head and thorax; black, broadly rufescent 
below. Thorax stout, convex, punctate; mesonotal notauli distinct in 
front; pleurae aciculate-punctate; metathorax strongly rugose with five 
(form typ.) or three (var. Oelandicus) distinct discal areae. Scutellum 
rugulose or scabriculous, very strongly convex and apically erosed. Ab- 
domen deplanate, black with central incisures usually rufescent; three 
basal segments finely scabriculous, the following shining and smoother ; 
basal segment rugose, hardly convex, apically deplanate, margined, with 
carinae extending a little beyond its centre or nearly to its apex; second 
transverse and obliquely subimpressed basally on either side. Legs 
fulvous with the tibiae externally pale-pubescent, and both pulvilli and 
unguiculi often infuscate. Wings slightly clouded, stigma and nervures 
infuscate; areolet wanting; radial nervure apically nearly straight; ner- 
vellus intercepted a little below its centre. Length, 6—8 mm. 
This species is not unlike £. puncfulatus superficially, but with the 
structure of the head and thorax very different; and the scutellum renders 
it unmistakable. 
It occurs in Germany, uncommonly in Sweden, Denmark, Lapland ; 
Pfankuch says he has often found it in Switzerland, and Dours records it 
from France. Ratzeburg’s mention of its parasitism upon Lophyrus pint 
may be correct, but its emergence from Tortrix (Coccyx) restnana is 
doubtless an error. With us it was brought forward as scarce in July 
near London by Stephens in 1835; and Bridgman found P. carinatus at 
Earlham in Norfolk. It is doubtless uncommon, since I have never taken 
it; Dr. Capron found several about Shere in Surrey, and Miss Chawner 
has given me three from the New Forest, probably bred by her from 
some sawfly, since a specimen in Marshall’s collection is labelled ‘‘ From 
Nematus ribesit, Scotland, Cameron”; and shows wide distribution. 
Bairstow records (Trans. Yorks. Nat. 1878, p. 69) a ¢ from Bishop 
Wood, York; and Thornley has given me one he took at South Leverton 
in Notts during June. 
2. plebejus, Wold. 
Trichocalymma plebejum, Wold. Bull. Ac. Petersb. 1877, p. 456, 3. 
A shining black species, with apex of abdomen broadly red. Head a 
little constricted posteriorly ; frons apically impressed; face centrally 
tuberculate; mouth and clypeus rufescent. Antennae somewhat stout, 
shorter than body, with flagellum infuscate ferrugineous. Thorax stout ; 
metathorax short with five distinct discal areae, of which the areola is 
