Euryproctus | BRITISH ICHNEUMONS. 249 

a transfascia on fourth, red or with only the second segment apically fer- 
rugineous in both sexes ; remainder apically flavescent-margined ; basal 
segment very slightly curved and subdistinctly sulcate discally to beyond 
its centre, with central spiracles; ventral plica flavous, hypopygium ex- 
tending to sixth dorsal segment; terebra short and infuscate. Legs 
fulvous; anterior with coxae and trochanters of ¢ whitish; hind coxae 
black and in @ apically, with trochanters, whitish ; hind tibiae in both 
sexes whitish with apices, apices of their femora, and all their tarsi, 
nigrescent. Wings hyaline, stigma and radius infuscate, radix and tegulae 
white ; areolet wanting or irregularly subpetiolate ; nervellus intercepted 
a little below centre. Length, 6 mm. 
Holmgren thought his ¢ intermediate between Luryproctus and JLeso- 
fetus, on account of the gradually explanate petiole and basal coarctation. 
Pfankuch tells us J/. fransfuga is synonymous with 7. a/bopictus, though 
Holmgren’s descriptions of the two differ in many essential features, and 
they are not amalgamated by Gaulle in 1908. 
This collective species occurs in Silesia, Belgium, France, and from the 
end of July to early September in southern Sweden; it was bred by 
Brischke (Schr. Nat. Ges. Danz. 1871, p. 80) from larvae of ema/us 
hypogastricus and of V. ¢esfaceus in Prussia. £. albopicius was recorded 
by Marquand from the Lands End district (Trans. Penzance Nat. Hist. 
Soc. 1884, p. 346); and by Bridgman from Brundall in Norfolk during 
July and August. JZ. ¢ransfuga was also brought forward by the latter 
with some hesitation (Trans. Norf. Soc. 1894, p. 625) from Kings Lynn 
in the same county and bred, probably at Worcester, from Camponiscus 
luridiventris by Fletcher. 
12. xanthostomus, Grav. 
Tryphon xanthostomus, Gr. I. E. ii. 257; Ste. Ill. M. vii. 254, ¢. Mesoleius 
xanthostomus, Brisch. Schr. Phys. Ges. Kénig. 1871, p.82, ¢ 9. Euryproctus 
xanthostomus, Thoms. O. E. ix. 927; Syndipnus xanthostomus, Thoms. O. E. 
xix. 2000, ¢ ¢. Mesoleptus rufocinctus, Gr. I. E. i, Suppl. 686; Ste. Ill. M. 
vii. 229, ¢. E. hilarellus, Holmgr. Sv. Ak. Handl. 1856, p. 377, ¢. 
A small species, black with the abdomen centrally red, the hind tibiae 
mainly and face centrally flavidous. Head hardly constricted posteriorly ; 
mouth, clypeus and a circular or bifurcate facial mark flavous ; clypeus 
short, subtruncate and often basally black. Antennae hardly shorter than 
body, filiform and apically subattenuate, with the four basal joints black 
and following red, becoming paler apically below. Thorax narrower than 
head, black and nitidulous ; areola narrow and very distinct, petiolar area 
crescentic and complete. Scutellum convex. Abdomen subpetiolate, as 
long as head and thorax, oblong and in ¢ apically explanate ; black with 
segments two to four and apex of the first red, the remainder apically 
pale-margined and venter flavidous; basal segment slightly curved, 
gradually explanate from apex of the parallel-sided petiole, fully twice 
longer than apically broad and discally sulcate to beyond its centre, with 
spiracles a little before its centre. Legs somewhat slender, red with tibiae 
flavescent in front; coxae and _ hind tarsi black, trochanters concolorous 
with apices flavous; hind tibiae, except apically, flavidous. Wings 
slightly clouded, stigma except at its pale base and radius infuscate, radix 
and tegulae stramineous; areolet entire, petiolate and irregular; nervellus 
intercepted below centre. Length, 5—7 mm. 
