BRITISH ICHNEUMONS. 79 



This species differs from M. biinaculatorius in the $ having only the 

 seventh segment white, in its larger size, breadth and sculpture of the 

 post-petiole centrally, as well as in its opaque mesonotum, and in the 

 epicnemiae, which extend very nearly to the callosity at radix. 



Hope took the female at Netley ; but Stephens did not consider the 

 species common, though he had found it in June and July, about London, 

 in Salop and in Devonshire ; I expect it is, nevertheless, of wide distri- 

 bution with us, since it is by no means rare on the Continent, and 

 Eridgman records it for Norfolk, at Earlham, Brundall and Lynn ; Mans- 

 bridge has bred both sexes from Mania typka : Bignell bred it in Devon, 

 where it is by no means common, though widely distributed, from N'onai^ria 

 caniiae, early in September ; Fitch from Nona^ria typhae, at Maldon 

 (Entom.), and it also preys upon Dicranura vinula, Meliana flainmea, 

 Leucania phragmitidis and Plusia ^^aiiunn. There is a female (which is 

 sometimes found hibernating in moss) with no data, in the Hastings 

 Museum ; and Beaumont has taken it at Boxhill, in July and September. 

 Chitty tells me it is a common parasite of Euche/ia jacobaene, from which 

 he has bred both sexes, at Oxford ; and I have found its pupa, which is of 

 the usual Ichneumonid type, in that of the same host, at Brandon, in 

 Suffolk. 



6. monostagon, Grav. 



Ithueiimon moiwstagou, Gr. Mem. Ac. Sc. Torin, 1820, p. 287 ; I. E. i. 172 ; Ste. 

 111. M. vii. 141, i : Wesm. M^m. couron. Ac. Belg. 1859, p. 23 ; Holmj^r. Ichn. Suec. 

 i. 167 ; Thorns. Ann. Soc. Fr. 1888, p. 107 ; Berth. ///'. cit 1895, p. 237, i ?. Melan- 

 nkiieuinon monostagon, Thorns. O. E. xviii. 1956. /. iiulagatoi-, Wesm. Nouv. Mem. 

 Ac. Brux. 1844, p/84, c5 9 ; Bui. Ac. Brux. 1849, p. 6 ; lib. cit. 1855, p. 397. /. per- 

 cussor, Tisch. Stett. Zeit. 1879, $. J. reiiiiittis, Tisch. lil>. cit. 1871, i. ^^ar. /. 

 luctuosus, Gr. I. E. i. 200, c5 ; Ste. III. M. vii. 146 (part). 



$ . Head with cheeks and temples moderately inflated; black, with often 

 a mark on the almost smooth clypeus, and the apex of the palpi, reddish ; 

 vertical orbits usually with a narrow pale yellow line. Antennae and thorax 

 black, the former white above in the centre, rather strongly attenuate, 

 seventh joint quadrate ; metanotum with complete upper areae, of which 

 the areola is sub -hexagonal and apically emarginate. Scutellum white. 

 Abdomen black, with the sixth and seventh, or rarely only the seventh seg- 

 ment marked with whitish-flavous ; the central area of the post-petiole is 

 rugosely- or punctato-aciculate, the lateral areae being more or less strongly 

 punctate ; the second segment is very closely punctate, with the gastrocaeli 

 of normal size, rather deeply impressed, the intervening space being 

 rugosely aciculate and broader than the centre of post-petiole ; the punctu- 

 ration becomes gradually finer towards the anus ; terebra shortly exserted. 

 Legs similar to those of the S- Wings a little clouded; stigma and 

 tegulae ferrugineous. 



S. Head black; palpi apically, lateral dots on the clypeus and the 

 internal orbits, narrowly white ; a mark on the mandibles red. Antennae 

 entirely black. Thorax black, sometimes with a small dot below the radix 

 white ; meso- distinctly higher than the metathorax, which has conii)lete 

 upper areae, the areola broader than long, semi -hexagonal and apically 

 emarginate. Apex of scutellum white. Abdomen black, with anterior 

 incisures deeply impressed and rufescent, without pale-markings on its anus 

 or first segment ; the sculpture as in the $ . Legs either black, with the 



