Polyclistus | BRITISH ICHNEUMONS. 25 

stigma deep black, and the radix and tegulae flavidous or fulvescent. 
Length, 64—7 mm. 
This is the largest species of the genus and is at once known by the 
apex of the radial nervure being slightly curved outward, in such a man- 
ner as to render the radial cell apically strongly acute; the basal segment 
is longer than in P. mansuefor, and the areola is parallel-sided to the base 
with no trace of basal area; the apophyses, however, are broad as in that 
species, and not rounded to the apex as in P. flaviceps. 
It appears distributed throughout all Europe, though doubtless the 
older authors mixed the following species with it and Thomson considers 
the male very rare; this sex was described by Fonscolombe as having the 
antennae setaceous, nearly as long as the body and dark ferrugineous 
beneath, the tegulae more ferrugineous than flavous, and a corpuscule on 
the pygidium. Dalla Torre gives no reference for his statement that 
Vollenhoven has bred this species from Anob:um pertinax. 
Exochus femoralis is recorded as British by Stephens, who had three 
specimens (one from Marsham’s collection) and says it is rather scarce 
but found about London in June; it has consequently figured in all our 
Catalogues, though there are no subsequent records. I possess a female 
from Capron’s Surrey collection and two which I captured at Monks 
Soham, Suffolk, on house windows in September, 1906, and beneath a 
lime leaf in the garden in June, 1908. Marshall took one at Nunton and 
Desvignes possessed another. 
2. mansuetor, Grav. 
Ichneumon mansuetor, Gr. Ubers. Zool. Syst. 1807, p. 254. Anomalon curv- 
ator, Trentep. Isis, 1829, p. 956. Exochus mansuetor, Gr. I. E. ii. 339; Steph. 
Illus. M. vii. 265; Ratz. Ichn. d. Forst. i. 124; 11.120; Fonsc. Ann. Soc. Fr. 1849, 
p. 234; Voll. Pinac. viii. fig.4, 9; Holmgr. Sv. Ak. Handl. 1855, p.309; Ofv. 1873, 
p-61,¢ %. EE. femoralis, Holmgr. Sv. Ak. Handl. 1854, p. 80,¢ 2. Poly- 
clistus mansuctor, Thoms. Deut. Ent. Zeit. 1887, p. 218, 2. 
A black and shining species with the mouth testaceous, and frons very 
little impressed above the scrobes; antennae beneath, and a facial mark, 
ferrugineous; stigma deep black, with radix and tegulae flavescent; legs 
red, with the hind coxae often basally infuscate; ¢ face not flavidous. 
Length, 3—42 mm.* 
At once known from both the other species by the distinctly upcurved 
radial nervure, the consequently less acute radial cell, and the very dis- 
tinctly constricted areola which is not infrequently discreted from the 
basal area, the basal segment is also much shorter and stouter, the body 
more convex and the 9 postannellus transverse. 
* When first I recognised this species in 1900, I thus described the female: Head black; vertex 
slightly convex, finely punctured and distinctly pubescent, with anterior ocellus placed in a slight 
depression ; frons much produced anteriorly, antennae inserted above its apex, before which it is 
slightly depressed in the centre; face piceous, becoming lighter above, evenly rounded convexly, 
shining, with fine scattered punctures and hairs: demarcation of clypeus traceable, succeeded by 
a regular row of large punctures, disc almost smooth, apex immarginate, almost truncate and 
emarginate in the centre; mandibles fulvous, black at base and appear to be pilose, dull, and 
unidentate ; maxillary palpi flavous, four-jointed, and fuscous at base and apex; labial palpi flavous. 
Antennae thick, ferrugineous below and lighter at base, somewhat piceous above, scape about as 
long as broad, second joint gibbose, remainder of equal breadth, broader than long, submoniliform. 
Thorax black; mesothorax finely punctured and shining, bordered throughout; mesopleurae and 
mesosternum exceedingly finely and scatteredly punctate, smooth and very nitidulous, the latter's 
dividing line rather broad, smooth, a little explanate and possibly aciculate at base before which is 
an abrubt and quite short central transverse ridge in front of the middle of the intermediate coxae ; 
