200 BRITISH ICHNEUMONS. 



A. subsericans not uncommonly about Felden ; Parfitt, at Ide, in Devon, 

 in August ; Bignell, at Ivybridge, in the middle of August ; Chitty, at 

 Woking and Forres ; Hamm, at Oxford ; Harwood, in Essex ; Beaumont, 

 at Whitby and Harting, in August, as well as at Byfleet and Bury St. 

 Edmunds ; Dr. Cassal has sent it to me from Ashby, near Doncaster, where 

 he took it at the end of June; and Waterston, from the Isle of Arran, in 

 September.! 



i8. armatorius, Forst. 



IchneuDion armatorius, Forst. Nov. Spp. Ins. 82, i . Amhiyieles arviatorius. Berth. 

 Ann. Soc. Fr. 1895, P- 618, S ? . I. fasciatorius. Fab. S. E. 330 ; Piez. 61 ; Panz. F. 

 G. Ixxx. 12 ; Gr. I. E. i. 376, excl. ? ; Ste. 111. M. vii. 175, c5 ; VVesm. Bui. Ac. Bru.K. 

 1839, pt. ii., p. 448 (gynandromoiph.). A. fasciatorius, Wesm. Nouv. Mom. Ac. Briix. 

 1844, p. 113 ; Bill. Ac. Biux. 1854, p. 84 ; Holnigr. Ichn. Suec. ii. 218 ; Voll. Pinac, 

 pi. vii., ff. I, 2 ; Thorns. Ann. .Soc. Fr. 1888, p. 116 ; O. E. xix. 2094, 6 9- /• quad- 

 rimacidatus, Gr. I. E. i. 370 ; Ste. 111. M. vii. 176, ? . /. diversoriiis, Sle. lib. cit. 175, 

 9 . A. rcgius, Tisch. Stelt. Zeit. 1878, i ? . 



A dull, black and yellow species. Head narrowed behind the eyes, 

 vertex somewhat emarginate, black ; palpi and the slender bidentate 

 mandibles partly pale, internal orbits flavous ; S with clypeus and face 

 also flavous. Antennae slender, setaceous ; ferrugineous, more or less 

 piceous above and towards the apices ; scape and sometimes flagellum of 

 $ flavous beneath. Thorax black, with pronotum and callosities before 

 and beneath the radix flavous ; areola sub-quadrate, costulae obsolete ; 

 coxal areae not discreted ; apophyses very large and stout. Scutellum 

 obtuse, somewhat convex, flavous. Abdomen dull black, of ? fusiform, 

 of $ elongate ; second and third segments broadly banded at the base, 

 the following posteriorly margined, with flavous ; $ with fourth and fifth 

 usually immaculate and the seventh entirely flavous ; post-petiole acicu- 

 late ; gastrocaeli small, superficial ; first ventral segment of ? not plicate, 

 fourth of $ plicate with hypopygium apically truncate. Legs soinewhat 

 slender, flavous ; coxae, except usually anterior of S , and part of hind 

 femora and tibiae, black. Wings somewhat clouded, of S flavescent ; 

 stigma fulvous, tegulae sometimes flavous. Length, 12-16 mm. 



The coloration of this species, which may at once be known by its large 

 and acute apophyses, is unusually stable ; that of the $ showing no varia- 

 tion and that of the $ varying only in the extent of black upon the third, 

 and to a small extent also upon the second, segi:nent ; the hind tibiae of 

 the former are apically ferrugineous. 



This is one of our commonest ichneumons, though I have chanced to 

 meet with it but once, while flying over heather, near Lyndhurst, in 

 Hants., in the middle of August ; Forster says it is frequent in gardens, 

 and Gravenhorst found it upon Chaerophyllum ; it is abundant on the 

 Continent, where it has been bred from Phlof^ophora meticulosa, Xylophasia 

 rurea, Mamestra brassicae and Agrotis fimbria ; its distribution is wide, 

 extending to northern Africa. In Britain it occurs from the middle of 

 June to September, and is extremely abundant on flowers and among 

 potatoes throughout the metropolitan district ; it is recorded from Darenth 

 Wood, Norfolk, Essex and Salop ; the Land's End district ; Holgate, near 

 Hastings, among young oaks ; Huddersfield, Bishop's Wood and Ilkley, 

 in Yorks. ; and Parfitt says it is a widely distributed and common species 



1 Tlie example of this species recorded in tlie Hastings list is referable to Chasmias palndicola. 



