BRITISH ICHNEUMONS. 89 



Wesmael says. The areola is semicircular, not longer than broad, 

 rounded in front with the apical margin slightly concave and angles 

 slightly obtuse ; the lateral areae are distinctly punctate and complete ; 

 the mesosternum has a common transverse fovea in the centre before its 

 base ; the sternauli are indicated ; the scutellum is more convex and the 

 post-petiole a little broader than in B. inaibi/or ; the abdomen is closely 

 punctate and dull throughout, not more nitidulous, though with longer 

 pubescence towards the anus ; the anterior coxae are distinctly white at 

 their apices, the posterior calcaria white, and the anterior femora, except 

 apices, and tibiae, except front ones, anteriorly black ; areolet somewhat 

 narrow. 



It is said to further differ from B. incidntor, L. {similatorius, Wesm.) in 

 the slightly shorter clypeus, little longer and less curved lower mandibular 

 tooth, shorter areola, and in the pubescence of the male which is white 

 and not cinereous ; all the authors agree, however, that the gastrocaeli, 

 with which are included the thyridii, are smaller. The legs and sixth 

 segment would appear to vary greatly in the extent of red and black 

 coloration. 



The only British specimen I have seen is that described above, which I 

 took flying by the roadside at Lyndhurst, Hants., 12th August, 1901. It 

 appears to be somewhat rare upon the Continent, occurring in France, 

 Germany, Belgium, and extending to Italy, but has not before been 

 recorded for Britain. 



5. tergenus, Grav. 



Ichneumon octogultatiis,^ Gr. I. E. i. 325, i . I. tergenus, Gr. I. E. i. 615 ; Ste. III. M. 

 vii. 205, excl. i ; Wesm. Nouv. Mem. Ac. Brux. 1844, p. 89 ; Bui. Ac. Brux. 1849, 

 p. 39 ; Holmgr. Ichn. Suec. i. 179 ; Thoms. Ann. Soc. Fr. 1888, p 109 ; Berth, lib. cit. 

 1895, p. 250, c5 9- Bariihneuiiioii tergenus, Thonis. O. E. xviii, 1961. 6 ?. 



The 9 is a squat, thick-set insect. Head black, almost always with pale 

 vertical lunulae ; S with palpi at apex and a mandibular mark pale, sides 

 of clypeus, internal and part of external orbits white. Antennae of ? fili- 

 form, hardly attenuate apically, with white central band ; of $ with scape 

 white, and generally flagellum ferrugineous, beneath. Thorax black ; of ? 

 immaculate, of 6 with pronotum and the usual callosities at radix white ; 

 prosternum not striolate ; metanotum punctato-rugulose, with upper areae 

 complete and very distinct ; the areola sub-hexagonal, transverse and apically 

 emarginate. Scutellum of 9 strongly deplanate and black ; of S obtuse, 

 elevated, with piceous hairs and two, often confluent, apical white dots. 

 Abdomen darkish red, of $ ovate-acuminate ; first more or less and most 

 of fourth to seventh segments black, the last two, or of S sometimes three, 

 white-marked ; post-petiole closely punctate, with distinct dorsal carinae ; 

 gastrocaeli normal, the intervening space about as broad as centre of post- 

 petiole ; third segment with basal incisure deep. Legs black, femora 

 stout ; anterior tibiae and front femora of $ reddish, former laterally 

 flavous ; <$ with anterior femora more or less piceo-stramineous apically, 

 their tibiae and tarsi laterally whitish ; hind tibiae of ? generally obscurely 

 ferrugineous basally ; hind coxae closely punctate without scopulae ; S 



1 Why the continental authors persist in preserving priority to Gravenhorst's later name I can- 

 not tell, but must suppose there is some good, though occult, reason for so doing, since what would 

 appear to be the true synonymy has been presented by Marshall, and is here repeated. 



