Mesoleius | BRITISH ICHNEUMONS. 141 
before radices; notauli slender and indicated to apex; mesopleurae very 
finely sculptured and nearly glabrous above ; areolar and petivlar carinae 
nearly entirely wanting. Scutellum and postscutellum flavidous. Abdo- 
men entirely black, smooth and somewhat nitidulous; basal segment 
hardly longer than hind coxae with obsolete sulcus and carinae, post- 
petiole laterally immarginate; third segment broader than long. Legs 
red, with hind tarsi and tibiae entirely black ; hind legs stout and elon- 
gate, their tibiae spinulose and calcaria longer than half metatarsus ; all 
claws stout. Wings with stigma pale infuscate, radix and tegulae dull 
stramineous; areolet minute, irregular and emitted from apical angle of 
recurrent nervure ; nervellus subopposite or slightly postfurcal. Length, 
Io mm. 
This species is known by the entirely black abdomen, hind tibiae and 
tarsi, and by the elongate and stout hind legs with elongate calcaria. It 
is retained in Thomson’s subgenus Baryfarbus by Pfankuch in 1906 and 
this cannot be Baryvéarbes of Forster, which is characterised by white- 
banded antennae and total lack of all metanotal carinae, nor can it be 
placed, as is done by Dalla Torre, in Forster's Polytrera, which has the 
nervellus intercepted far below its centre. I have seen examples with the 
areolet wanting, but usually it is strong and petiolate; the antennae are 
stout, elongate and often mainly red. 
It appears to be of infrequent occurrence on the Continent from 
southern Sweden, through Germany where Brischke did not find it, to 
France ; but has not yet been bred. With us, however, it is certainly 
common and was contained in Stephens’ collection, though I have 
taken only females in the Bentley Woods on 31st May, 1903, flying along 
and examining the twigs of a hawthorn hedge on an extremely hot after- 
noon, and sitting on a flower of Zchtum vulgare at Brandon in Suffolk on 
11th June, 1908. I have a nice series from Surrey in Capron’s coll. and 
several from the New Forest (Miss Chawner), S. Leverton in Notts in 
June, 1897 (Thornley), Guernsey in August, 1908 (Luff), Felden Herts 
(Piffard) and Freshford near Bath in May (Charbonnier). Marshall took it 
at Cornworthy and Botusfleming, Bridgman at Eaton near Norwich in 
June and July, Atmore at Kings Lynn in 1906 and Col. Nurse in June, 
1906, at Ingham in west Suffolk. 
2. ustulatus, Desv. 
Tryphon ustulatus, Desv. Cat. 1856, 38, ¢ . 
A large, black and strongly nitidulous species with the mouth, clypeus, 
antennae except scape above, radices, radical callosities, tegulae and 
whole legs clear red, with the hind tarsi and apices of their tibiae alone 
infuscate. Metanotum strongly coarctate ; basal segment petiolate and 
subsulcate to beyond its centre; abdomen convex with extreme base of 
second and third segments hardly perceptibly badious, anus subcom- 
pressed, venter not pale; stigma ferrugineous. Length, 12 mm. @ only. 
This unique specimen agrees with J/. vrgulforum in the neuration 
excepting the more oblique lower basal nervure and much more strongly 
rounded discoidal nervure, in the nitidulous body, stout legs and smooth, 
convex metathorax, but is abundantly distinct in its larger size, red cly- 
peus and hind tibiae, shorter hind calcaria which do not reach centre of 
