Exochus | BRITISH ICHNEUMONS. 39 

9. aethiops, Grav. 
Exochus aethiops, Gr. I.E. i. Suppl. 693; Steph. Illus. M. vii. 265; Brisch. 
Schr. Ges. Konig. 1871, p. 101. Triclistus aethiops, Thoms. Deut. Ent. Zeit. 
1887, p. 206, 2. 
A black species with the tegulae concolorous and the tibiae infuscate 
with the front ones pale. Metathoracic spiracles small. Basal segment 
not or hardly longer than apically broad, with distinct discal carinae. All 
the coxae, trochanters and femora black; front tibiae red, the intermed- 
iate entirely and hind ones externally rufo-ferrugineous and the latter 
internally infuscate; tarsi rufescent, with the hind ones darker. Wings 
with radius emitted beyond centre of stigma; areolet subsessile, nearly 
regularly triangular and larger than usual. Length, 5 mm. Q only. 
Thomson, who places this species among those with the basal segment 
not or hardly longer than broad, in spite of Gravenhorst’s “‘segmento 
primo latitudine duplo fere longiore,” regarded it as distinct from all 
other 7Z7iclist? in the broader and posteriorly more produced vertex, 
griseous-hyaline wings, radius emitted from nearly the apical third of the 
narrow stigma with its apex hardly at all curved, the somewhat elongate 
petiole, slender hind tarsi, very short external calcaria and large areolet. 
I know nothing of this species, which Gravenhorst described from 
Netley in Shropshire, Brischke found in Prussia and Thomson in Sweden. 
Stephens, as usual, professes to have found it near London in June; his 
specimen, the only one in the National Collection, is correctly named. 
10. lativentris, Thoms. 
Triclistus lativentris, Thoms. Deut. Ent. Zeit. 1887, p. 203, ¢ ¢. 
A black species with the legs, except coxae and trochanters and some- 
times femora, red; metanotal costulae wanting and spiracles large; wings 
hyaline with the areolet obliquely transverse, petiolate and sometimes 
externally incomplete. _Petiolar area exactly half length of metanotum ; 
areola apically dilated; hind calcaria not elongate. Length, 5 mm. 
This species is of the size and outline of Z. podagricus but the petiolar 
area is longer, the areola apically explanate, the apical discal segments 
are centrally finely punctate and pubescent, the basa! shorter with longer 
carinae, the second subtransverse and the anterior femora are often black- 
marked beneath. 
A single specimen of this Swedish species was bred in May, 1884, by 
Fletcher from L’mmelesia alchemillata, probably at Worthing (‘Trans. Ent. 
Soc. 1887, p. 374) and named by Thomson. I have swept another from 
low herbage on the Red Cliff at Sandown, Isle of Wight, on 29th June, 
1907; this hardly appears typical since the hind femora are deep black 
and the areola is peculiarly obsolete, though distinctly dilated apically. 
11. antiquus, Hal. 
Exochus antiquus, Hal. Ann. Nat. Hist. 1839, p. 113, ¢. 
Head and thorax black with the facial orbits and lines before the radices 
flavous. Abdomen immaculate. Legs flavous with the hind ones basally 
fulvous and their coxae black. Wings with the areolet pentagonal. 
Length, 64mm. 4 only. 
