170 BRITISH ICHNEUMONS. [ Mesoleius 

fovea sometimes continued sulcately to the parallel-sided postpetiole ; 
second and third segments longer than broad. Legs normal; the front 
ones entirely, with hind coxae and trochanters, flavous ; hind femora red, 
their tarsi and tibiae infuscate with base of the latter dull white; hind 
calcaria a little longer than one-third of their metatarsus. Wings with 
tegulae flavous, stigma infuscate; areolet wanting, recurrent nervure not 
fenestrate ; nervellus slightly antefurcal and obsoletely intercepted far 
below its centre. Length,5 mm. 6 only. 
The extent of the abdominal markings is said by Bridgman to vary. 
This species cannot be the JZ. (Sao/us) brevispina of Thomson ; it was 
brought forward as such with considerable hesitancy by Bridgman; the 
latter differs in having the mesosternum black, hind coxae red, second 
segment quadrate, anus entirely whitish and the hind calcaria not longer 
than one-third of their metatarsus. 
Introduced and described by Bridgman (/oc. cz¢.) from several males 
bred by Fletcher from a new leaf-rolling sawfly, Vematus purpurea, Cam., 
discovered by him in June, 1886, on Salix purpurea at Worcester. I 
possess a male of this species, from the same source, of hardly more than 
three and a half millimetres in length. 
41. compressiusculus, Thoms. 
Mesoleius (Saotus) compressiusculus, Thoms. O. E. ix. 934. Saotus com- 
pressiusculus, Thoms. O. E. xix. 2019. 
Black, with the clypeus and hamate lateral mesonotal marks whitish- 
testaceous ; mesosternum black. Apices of abdominal segments two to 
six somewhat broadly whitish-testaceous ; anterior coxae whitish; hind 
coxae basally black. Length, 3—5 mm. Sex not noted. 
Known by the lateral stricture between the second and third dorsal 
segments, the white hamate mesonotal marks and basally black hind 
coxae. It differs from JZ. brevispina, Thoms., in the broader radial cell, 
hardly discreted frenal scrobes, black scutellum, narrower and basally less 
elevated petiole and broader terebral valvulae. 
Bridgman says (Trans. Norf. Soc. 1894, p. 626), with no hesitation, 
that he has captured this insect at Eaton near Norwich in June. From 
the above details of the species, the whole vouchsafed by Thomson, his 
specimen was probably named by its author. 
DYSPETES, Forster. 
Forst. Verh. pr. Rheinl. 1868, p. 201. 
Body black and pubescent. Face subdeplanate, centrally and apically 
elevated ; clypeus strongly discreted and apically very broadly rounded ; 
mandibular teeth of equal length; eyes oblong and cheeks not short ; 
vertex angularly excised centrally. Metathoracic areae distinct, but not 
complete ; the spiracles circular and not large. Abdomen with the 
carinae of the hardly petiolate basal segment elongate but obsolete, and 
its subprominent spiracles slightly before the centre; second segment 
with broad and deeply impressed thyridii, third subimpressed basally on 
either side; hypopygium large and extending almost beyond the 
pygidium ; terebra very slightly exserted. Tarsal claws stout and mutic. 
Areolet entire and tetragonal, transverse, large and subsessile. 
