144 BRITISH ICHNEUMONS. [ Mesoleius 


basal segment half as long again as broad and twice broader at apex than 
base, with carinae extending to just beyond centre in ¢@ and obsolete in 
@; second segment in @ quadrate and in 9 transverse; third longer 
than broad. Legs red with apices of hind femora, their tarsi entirely and 
tibiae except their badious base, infuscate; front coxae and a mark 
beneath the intermediate flavous, more broadly in 9. Wings with stigma 
ferrugineous, tegulae flavous; areolet transverse and more or less dis- 
tinctly petiolate; nervellus subopposite and intercepted a little below its 
centre. Length not indicated. 
I suggest that Bridgman has transposed the sexes; he says it is most 
closely allied to JZ. (Lamachus) silvarum, Holmgr., from which it differs 
in having the mesopleurae flavous and the coxae flavous and red. 
Both sexes were bred by Fletcher from cocoons of Scots Lophyrus pint 
about 1881, and no one has since noticed this parasite. 
6. brachyacanthus, Parf. 
Mesoleius brachyacanthus, Parf. E. M. M. xviii, 1881, p. 78, ¢; cf. Rep. Devon. 
Assoc. 1881], p. 275. 
Head broader than thorax, with the mouth and palpi stramineous. 
Antennae ferrugineous beneath, ‘‘ the basal joint very small, the second 
rather large, with an arched protuberance above.” ‘Thorax nitidulous 
black and very finely punctate ; ‘‘ mesothorax with two short, lateral con- 
cave spines; the metathorax with two raised lines crossing each other at 
nearly right angles, forming a St. Andrew’s cross.” Abdomen black and 
cylindrical, apically explanate, finely punctate with apices of all the seg- 
ments pale testaceous, except the first which is basally flavous-spotted on 
either side. Legs testaceous or flavescent, with apices of the anterior 
tarsi nigrescent and intermediate coxae stramineous ; hind legs with coxae 
and trochanters except apices of latter black, their femora piceous and 
internally infuscate before the stramineous base, their tibiae testaceous 
becoming apically nigrescent and tarsi, concolorous. Wings ample and 
subinfumate ; stigma and nervures testaceous, basally paler; tegulae 
stramineous; areolet oblique and irregularly quadrate; expanse 9 mm. 
Length, 6 mm. 
Parfitt possessed only two males of this species, which were taken about 
Exeter in 1879. They are probably now in the Exeter Municipal 
Museum : Bignell believed his collection was “in Exeter.” 
7. vepretorum, Grav. 
Tryphon vepretorum, Gr. I. E. ii. 142, ¢ 2. Mesoleitus vepretorum, Holmer. 
Sv. Ak. Hand]. 1855, p.133; foc. cit. 1876, p.3, ¢ ¢; ef. Kriech. Ent. Nachr. 
1897, p.68. M. (Otlophorus) vepretorum, Thoms. O. E. xix. 2026, ¢ ?. 
Head as broad as thorax, finely punctulate and hardly constricted pos- 
teriorly ; mouth red, face of 9 black and of @ flavous; lower mandibular 
tooth much the longer; clypeus apically depressed throughout and 
slightly emarginate, with its centre subacutely produced. Antennae fili- 
form, as long or slightly longer than body, infuscate with flagellum 
rufescent, and @ scape flavidous, beneath. ‘Thorax black, of ¢ with cal- 
losity below radices and basal suture of mesopleurae pale; metathorax 
