76 BRITISH ICHNEUMONS. [ Stenomacrus 

with the apices of coxae, of femora, the trochanters, tibiae and tarsi 
testaceous ; anterior femora sometimes partly testaceous, the hind ones 
and their tibiae stout and the latter apically infuscate. Wings apically 
broadly rounded, subinfumate, with stigma pale infuscate ; radial nervure 
externally very slightly curved, internally nearly straight. Length, 
24—3 mm. 
This species was introduced as British, under the name of O. merula, 
Gray., by Marshall in 1870, but an examination of his examples in the 
Brit. Mus. shows them to appertain to Holmgren’s description, which 
Thomson thought (O. E. 2446) to be synonymous with his own S. ochripes 
and Holmgren gives as “certissime”’ the same species as 2. pusillus, Zett. 
To which of his own species to ascribe 2. minutus, Zett., ‘Thomson did not 
know. 
There is a single pair in Marshall’s collection from Cheltenham and 
Epping Forest, of which the ¢ has the face entirely pale, thus proving it 
to be Holmgren’s and not Grav.’s species. It is said to be not infrequent 
throughout Sweden in marshy places and I have little hesitation in here 
placing numerous’ specimens in my collection, which I should with cer- 
tainty ascribe to S. affinzs, Zett., on account of their slender legs, were 
that species not said by Thomson, who examined Zetterstedt’s types, to 
emit the radial nervure from the centre of the stigma, whereas in these it 
is given off distinctly before its centre. 
I possess some forty examples taken by Bignell at Bickleigh during Sep- 
tember, with the exception of five from the same locality on 21st and 22nd 
October; he has also given it me from Exeter, Newbery from Tilgate 
Forest in Sussex, Marshall from Bishops Teignton in Devon and Capron 
from Surrey. It is certainly rare in Suffolk, where I took it in the Bentley 
Woods on 29th May, 1902, and on reeds in the Southwold salt marshes on 
14th September, 1907. 
17. binotatus, Holmgr. 
Orthocentrus binotatus, Holmgr. Sv. Ak. Handl. 1855. p. 346, ¢?. 
A shining, punctulate and black species, with pale legs. Head trans- 
verse and subbuccate, not constricted behind the eyes, shortly pubescent 
and shining; frons deplanate and smooth ; face normally protuberant and 
very finely transaciculate, piceous with the upper margin transversely fer- 
rugineous ; mandibles testaceous, with base and apex darker; palpi pale, 
with the last joint longer than penultimate. Antennae rather longer than 
half body, filiform and somewhat stout, testaceous beneath towards the 
base ; basal flagellar joint subquadrate and very slightly longerthan broad. 
Thorax stout and black, shining and discally punctulate; areola and the 
subperpendicular petiolar area entire. Abdomen compressed towards the 
anus ; first segment and the second to beyond its centre scabriculous, 
former convex and behind the centre laterally impressed, and convergently 
bicarinate; second segment laterally testaceous; venter stramineous, 
terebra very short. Legs normal and testaceous with the femora above, 
and most of the hind coxae, nigrescent. Wings subhyaline; radix 
stramineous, the narrow stigma and nervures pale ; radial nervure apically 
nearly straight. Length, 3 mm. 
I have been unable to discover any exact distinction between this 
species, which much resembles S. ambiguus, Holmgr., in size and con- 
formation, and the last-described, with which it agrees in the transverse 
