Mesoleptus | BRITISH IGHNEUMONS. 229 

15. macrodactylus, Holmer. 
Mesoleptus macrodactylus, Holmgr. Sv. Ak. Handl. 1854, p. 68; l. c. 1855, 
p.106, ¢; Brisch. Schr. Phys. Ges. Konig. 1871, p.66; Schr. Nat. Ges. Danz. 
1878, p. 68, ¢ ¢. M. scutellatus, Bridg. Trans. Ent. Soc. 1886, p. 356, 2. Hadro- 
dactylus macrodactylus, Thoms. O. E. ix.922. Gausocentrus macrodactylus, 
Dhoms: OF b-xixn 9815 aS). 
Head transverse and not constricted posteriorly; mouth, clypeus, and 
face pale, Q face triangularly black basally; clypeus discreted, finely 
punctate, apically depressed and subtruncate; frons closely punctate. 
Antennae longer than body, and red with scape flavous beneath. Thorax 
black with @ pronotum sometimes apically flavous; notauli somewhat 
distinct apically; pleurae shining and sparsely punctate, epicnemia 
elevated; metathorax somewhat convex, smooth, pubescent with no trace 
of areae. Scutellum convex and, like postscutellum, flavous. Abdomen 
elongate-clavate and black with second to fourth segments red; basal 
segment nearly smooth, with central spiracles and no discal carinae ; 
terebra black. Legs stout and red; all trochanters red, hind coxae 
entirely and the anterior partly black; hind legs stout, with the claws 
large and curved. Stigma dull testaceous, tegulae pale; areolet triangular, 
petiolate and small ; nervellus postfurcal, intercepted a little above the 
centre, Length, 7—8 mm: 
Very like the next species and perhaps no more than a colour variety 
of it; together they are known from the remainder of this genus by the 
peculiarly large claws of their stout legs, which are nearly as thick as in 
the genus Z7yphon, and by the pale scutellum. 
It is widely distributed in western Europe and was described as a new 
species by Bridgman from Horning Ferry in the Norfolk Broads, where 
he took it on zgth June, 1882 (a co-type, bearing this date, is in Mar- 
shall’s collection), but subsequently (Trans. Norf. Soc. v, p. 624) he 
synonymised it as above. Certainly a very rare species with us, and I 
possess but a single pair, of which the male was found at Tostock in 
Suffolk at the middle of July, 1900, by Tuck; and the female was swept 
by myself at Rhinefields in the New Forest on 12th July, 1909. Stenton 
took a female at Wimbledon on roth August, 1910. 
16. sordidus, Grav. 
Mesoleptus sordidus, Gr. 1. E. ii. 36, ¢. Gausocentrus sordidus, Thoms. O. E, 
xix. 1981. 
Face dull infuscate, mouth alone testaceous. Antennae filiform and 
slender, longer than body, ferrugineous becoming intuscate above ; 
thorax immaculate black. Scutellum and postscutellum dull testaceous. 
Abdomen elongate-clavate and black with second to fourth segments tes- 
taceous, the second discally and fourth apically infuscate ; basal segment 
elongate. Legs testaceous with the coxae black or anterior castaneous ; 
hind femora incrassate and castaneous with tarsi entirely, and their 
stramineous tibiae at both extremities, nigrescent. Stigma and radius 
black, radix and tegulae stramineous; areolet irregular and petiolate. 
Length, 8 mm. 
This species is said by Thomson, who has correctly recognised it | says 
Pfankuch ], to be quite similar to IZ. macrodactylus in size and outline, but 
