278 BRITISH ICHNEUMONS. [Lathrolestus 

2. bipunctatus, Bridg. 
Grypocentrus bipunctatus, Bridg. Trans. Ent. Soc. 1886, p. 358, ¢. 
Head dull and distinctly a liitle constricted behind eyes with the 
mouth, mandibles, most of clypeus, the juxta-antennal orbits and a dot 
at the vertical, fulvous ; face transverse and centrally prominent; clypeus 
deeply discreted, apically depressed and subtruncate. Antennae as long 
as body, infuscate and beneath basally fulvous. Thorax somewhat dull, 
very finely punctate with distinct notauli and nitidulous mesopleurae; 
metanotum dull and finely punctate, areae and costulae entire but indis- 
tinct, areola pentagonal and longer than broad. Scutellum convex. 
Abdomen ovate, nitidulous, dull piceous throughout with white, sparse 
pubescence and transverse segments; basal segment petiolate, spiracles 
just beyond centre ; postpetiole gradually explanate throughout, its apex 
fully thrice broader than base; terebra reflexed and slightly exserted. 
Legs normal, fulvous ; coxae, except apices of front ones, black; hind 
femora, with apices of their tibiae and of their tarsi, nigrescent. Wings 
with tegulae flavous, stigma pale infuscate and areolet sessile; nervellus 
intercepted below centre. Length, 3} mm. @ only. 
_ Sufficiently distinct in the capital markings and petiolate abdomen, 
which appears to relegate it to the genus La/hrolestus, Thows. 
It was described from a single female, doubtless still in Bridgman’s 
collection in the Norwich Castle Museum, which was taken at Wimbledon 
in Surrey during July, 1880. Subsequently its author found this species 
at Earlham in Norfolk, in June. ‘The sole representative of Zryphon 
nanus, Grav. (which, Pfankuch finds, is synonymous with Hemteles ful- 
vipes and not an Adelognathus, under which genus it has for so long stood 
in our list) in Stephens’ collection is referable to the present species, 
with the frontal and occipital fulvous marks very distinct and by no 
means conformable with his description which is copied from Grav.; he 
says (Ill. Man. vii. 237) that it was taken in July, 1835, at Hertford. 
3. marginatus, Thoms. 
Lathrolestus marginatus, Thoms. O. E. ix. 917 et xix. 1982, ¢ ?. 
Black, head and thorax flavous-marked, vertex margined and frenal 
scrobes distinct. Length, 5 mm. 
To his meagre diagnosis Thomson adds that it differs from his Z. cau- 
datus (which, in turn, differs from L. macropygus in its entirely black 
abdomen and distinctly exserted terebra) in the vertex being obviously 
margined centrally, the mouth with clypeus and cheeks broadly, a small 
juxta-antennal mark and a large one at the vertical orbits, the antennae 
beneath and the legs flavous, with coxae except basally and trochanters 
whitish, the areolet sessile, abdomen testaceous with the first segment 
entirely and the second and third basally broadly black, the terebra stout, 
somewhat elongate and less curved. He adds that the 2 of Z. margin- 
atus varies in having the areolet apically incomplete and the @ in having 
the mouth, face, cheeks very broadly, with nearly whole of pronotum and 
mesosternum, stramineous. 
Bridgman records this species (Trans. Norf. Soc. v, p. 627) from 
Mousehold Heath near Norwich, with no note of its novelty as British, 
in 1894. 
