Exochus | BRITISH ICHNEUMONS. 49 

25. lentipes, Grav. 
Exochus lentipes, Gr. I. E. ii. 344; Steph. Illus. M. vii. 266; Fonsc. Ann. Soc. 
Fr. 1849, p. 235, 2; Ratz. Ichn. d. Forst. iii. 131; Thoms. Deut. Ent. Zeit. 1887, 
p. 215,¢ @. EE. cylindricus, Holmgr. Sv. Ak. Handl. 1855, p. 317; Ofv. 1873, 
p. 76; Brisch. Schr. Nat. Ges. Danz. 1891, p. 62, ?. 
A black, narrow, cylindrical, elongate shining and strongly deplanate 
species. Head with the face of ¢ entirely, of 9 with a fascia beneath 
the scrobes, flavous. Antennae black. ‘Thorax with a linear callosity 
before the radices whitish; areola elongate and subparallel-sided, cos- 
tulae distinct or obsolete. Scutellum apically rufescent or pale flavous. 
Abdomen black and narrow, of g with the three basa] segments laterally 
or apically stramineous; first segment convex with somewhat elongate 
carinae, the second almost longer than broad and laterally finely punctate. 
Legs red with the coxae sometimes piceous or even nigrescent; hind tibiae 
ferrugineous, with the apex and base black, the latter followed by a white 
band; hind tarsi whitish and not black-banded but with apices of joints 
becoming gradually more broadly testaceous or ferrugineous towards apex.: 
Wings hyaline with stigma testaceous, and the curved apical abscissa of 
the radial nervure nearly thrice longer than the basal. Length, 5—5 mm. 
This species may be recognised by its short hind calcaria, immaculate 
frontal orbits and peculiar pedal colouration. 
It appears to have been much mixed everywhere with the next, and I 
have little doubt that Stephens’ record “Scarce: taken in June near 
London,” upon which alone it has been accorded a position in our List 
for the last seventy-five years, refers to Z. fzbzalzs. Certainly I have seen 
nothing I could refer to it, and there is no subsequent mention of it in our 
literature. It might, however, occur with us, since it is found in Germany 
and Sweden. 
26. tibialis, Holmgr. 
Exochus tibialis, Holmgr. Sv. Ak. Handl. 1855, pp. 317 e¢ 389; Ofv. 1873. p.76; 
Voll. Pinac. pl. viii, fig. ix; Brisch. Schr. Nat. Ges. Danz. 1878, p.108; Thoms. 
Deut. Ent. Zeit. 1887, p. 215, ¢ ¢. 
Black with the legs, and most of flagellum, red ; hind tibiae white with 
their base and apex black. Length, 4—5 mm. 
Similar and closely allied to Z. /enfipes, but smaller and stouter with the 
hind tibiae white, basally above and apically more broadly nigrescent with 
no red colouration, the flagellum shorter and paler, the areola apically 
dilated and not so long, the metathoracic spiracles circular and somewhat 
large. 
This is a common species, introduced as British by Fitch (Entom 1880, 
p. 258) on the strength of two specimens bred by Weston from (? Zortrices 
in) the oak galls of Cynips Kollar’ ; and subsequently (7d. cz/. 1883, p. 67) 
from Stigmonota rufimitrana by Lord Walsingham. Bridgman took it at 
Mousehold, Earlham and Brundall in Norfolk, and addsthat Fletcher bred 
it from Gelechia populella ; doubtless Ratzeburg’s record of Lvochus lentipes, 
from the same species of Z7vea, refers to the present insect. Piffard and 
Capron found it in Hertfordshire and Surrey, Elliott at Monks Soham, 
Tuck at Tostock in Suffolk and Chippenham Fen in Cambridgeshire 
during July and September; it has occurred to me on Heracleum Flowers, 
on reeds at Filby Broad in Norfolk and Tuddenham Fen in Suffolk, and 
on bracken at Wilverley and Lyndhurst in the New Forest, from the 
middle of June to the middle of August. E 
