230 BRITISH ICHNEUMONS. [ Aesoleptus 

with all the coxae and the hind femora black ; I suspect them of synonymy, 
in spite of the facial colouration. 
It has occurred in Germany, France and Belgium. With us it was 
recorded as indigenous by Desvignes in 1856 on the strength of 
specimens in Curtis’ collection. It certainly requires confirmation as 
British. 
17. glacialis, Woldst. 
Mesoleptus glacialis, Woldst. Bidr. Kan. Finl. Natur. 1874, p. 33, ¢. 
A shining and pubescent black species. Head somewhat constricted 
posteriorly and broader than thorax with mouth, clypeus, apices of 
cheeks and face, except longitudinally in the centre, stramineous; clypeus 
apically subdepressed and very slightly emarginate. Scape stramineous, 
and flagellum red, beneath. ‘Thorax black with prosternum and radical 
callosities flavous; metanotal areae strongly incomplete. Abdomen black, 
with its centre red; basal segment narrow and not sulcate, with subcentral 
spiracles. Legs slender and red; anterior coxae and trochanters pale 
flavous; hind tarsi, coxae, apices’ of tibiae and base of trochanters nigres- 
cent. Areolet wanting; tegulae stramineous, stigma pale; nervellus 
intercepted below centre. Length, 7—8 mm. 
It appears to me to differ from JZ. xanthostigma in little but its lack of 
areolet. 
This Finnish species was introduced as British by Bridgman (Trans. 
Ent. Soc. 1889, p. 432) on the strength of two specimens, taken by the 
Rev. T. A. Marshall near Abergavenny in Monmouth; one of these is 
still in the latter’s collection in Mus. Brit., labelled “‘ Govilon.” An 
unlocalised ? in the National Collection was, I think correctly, considered 
a variety of AZ. xanthostigma by Desvignes. 
PERISPUDUS, Thomson. 
Thoms. O. E. vii. 1873; (?) Perisbuda, Forst. Verh. pr. Rheinl. 1868, p. 205. 
Body large and black, sometimes centre of abdomen and the legs 
mainly pale. Head with the vertex somewhat broad. Thoracic notauli 
vaguely impressed; metathorax with the petiolar area short and entire, 
and the longitudinal carinae not very distinct. Abdomen with the petiole 
elongate and spiracles a little before centre of the basal segment. Meso- 
pleurae somewhat closely punctate with the speculum glittering. Wings 
with the basal nervure oblique and the areolet small, petiolate; hind wings 
with the nervellus elongately postfurcal. 
The genus was treated of under J/soleptus by Holmgren and in our 
own catalogues, but Thomson in 1893 and 1895 placed both our species 
in it as a subgenus of AZesole’us from which it differs, besides the whole of 
the characters given above, in the very obviously petiolate first segment, 
in respect to which I think it better placed among the Mesoleptini. 
Tryphon flavipes, Grav., said to belong to this genus by Pfankuch, has 
been given as British by our older authors, but almost certainly in error. 
Table of Species. 
(2). 1. Femora black; abdomen _ broadly 
flayous ; . I. SULPHURATUS, Grav. 
(1). 2. Femora red; abdomen entirely black 2. FACIALIS, Grav. 
