62 BRITISH ICHNEUMONS. [ Orthocentrus 

at Monks’ Soham and by sweeping in Tuddenham Fen, Suffolk. Mar- 
shall introduced Orthocentrus spurius, Grav., as British in 1870, on the 
strength of a 9 of the present species, which he had captured at Rannoch 
and is still in his collection (in Mus. Brit.); its author knew but a single 
@, from Warmbrunn in Silesia, and no one has since recognised it; 
possibly it is synonymous with O. fulzipes, though Thomson thought it 
more like O. profuberans (O.E. 2430). Haliday’s MS., in Dublin Museum, 
indicates it as taken commonly by himself in Ireland. 
10. radialis, Thoms. 
Orthocentrus radialis, Thoms. O.E. xxii, 2430,¢ 9. O. anomalus, Gr. I. E. 
iii, 360, 3 (part.). 
Black. Head of ¢ with the cheeks, face and mouth stramineous. 
Antennae of 2 ferrugineous throughout. Legs fulvous. Wings with the 
stigma pale and the radial nervure basally straight. Length, 3—5 mm. 
Almost exactly like the last species, especially in respect of the pedal 
and prothoracic colouration; but differing therefrom in its pale stigma, 
basally straight radius, the ferrugineous 9 antennae, and in the ¢ having 
the frons entirely black and the cheeks less broadly stramineous. 
I have had considerable difficulty in distinguishing the representatives 
of this species from those of the last; but I fancy the above characteristics 
are sufficiently constant to warrant it standing. It would appear to be 
commoner with us than O. fu/vipes, since Piffard has taken if freely at 
Felden in Herts; Marshall a long series at Cornworthy in Devon; Beau- 
mont at Enniscorthy in September; Yerbury at Golspie in Sutherland in 
August; Bowdler at Blackburn and Capron at Shere in Surrey. I took a 
Q in my father’s garden at Ryde, in the Isle of Wight, during the first 
half of October, tg901. It is probably much mixed with the preceeding on 
the Continent, whence it is only known from Sweden. 
11. protuberans, Holmgr. 
Orthocentrus protuberans, Holmgr. Sv. Ak. Handl. 1855, p. 333; Thoms. O.E. 
xxii, 2429, ¢ ¢; cf. Roman, Nat. Unt. Sarek. iv. 352. O.insularis, Ashm. Journ. 
Linn. Soc. Zool. 1894, p. 142, ¢. 
Nitidulous, punctate and nigrescent. Head not vertically narrow; frons 
somewhat smooth anteriorly and a little impressed, basally punctulate ; 
face strongly protuberant, punctulate and in 2 piceous; g with mouth, 
clypeus and face, 9 with mouth and facial margin below antennae, pale. 
Antennae rather longer than half body, of ¢ somewhat slender and in 
Q stout with basal flagellar joint very short and transverse; basally pale 
beneath in both sexes. Thorax narrower than head, subcylindrical and 
black with the pleurae very smooth and three elongate metanotal areae. 
Abdomen a little longer than head and thorax; basal segment subparallel- 
sided, hardly elevated basally and a little deplanate apically, finely and 
aciculately rugulose with carinae extending nearly to its apex; second 
subquadrate or in ¢ longer than broad, subrugulose and becoming both 
basally and laterally aciculate, impressed on either side beyond the centre, 
ferrugineous in ? or black with the apical margin pale in dQ; third 
basally aciculate and apically nearly smooth, entirely black or apically 
subrufescent; the following shining and pubescent, apically paler; ¢ with 
the second incisure and 2 with the three basal incisures pale; venter of 
