BRITISH ICHNEUMONS. I3I 



20. stramentarius, Grav. 



Ichneumon strafnetttarius, Gr. I. E. i. 281 ; Ste. 111. M. vii. 161 ; Wesm. Bui. Ac. 

 Brux. 1S4S, p. 160 ; Tisch. Stett. Zeil. xxxiv. p. 420, 9 ; Holmt^r. Verh. z.-b. Ges. 1S7S, 

 p. 168, S 9 ; Kiiech. Ent. Nachr. iSSo, 6 ; Berth. Ann. Hoc. Fr. 1S94, p. 640. /. Iiicta- 

 toriits, var. 13, \\'esm Nouv. Mem. Ac. Brux. 1S44, p. 57, 9. 



Body stout. Head black, cheeks very slightly inflated, sparsely punc- 

 tate, clypeus shining; $ with internal orbits sometimes pale ; c? with 

 palpi, mandibles, clypeus and face, flavous. Antennae of $ stout, filiform, 

 fourth flagellar joint quadrate, centrally white-banded ; of $ with joints 

 six to twenty finely carinate internally, and scape flavous, flagellum some- 

 times ferrugineous, beneath. Thorax with lines at radix and sometimes 

 the pronotum flavous in c^ ; pleurae trans-striate beneath, more strongly 

 in $ ; areola sub-quadrate, its length variable, emarginate apically, often 

 sub-hexagonal in $ . Scutellum and usually post-scutellum flavous ; of $, 

 strongly convex. Abdomen acuminate-oval in $ , elongate-elliptic in $ ; 

 post-petiole aciculate ; gastrocaeli large and deep, with the intervening 

 space punctate ; segments two and three in both sexes entirely, five to 

 seven marked in 5 with, clear flavous, that on the fifth being the smallest ; 

 third segment sub-quadrate in i , which has first apically and fourth basally 

 also flavous. Legs black, tibiae clear flavous, posterior apically black ; 

 tarsi rufescent, hind ones infuscate ; $ with front legs, except coxae, 

 flavidous throughout ; scopulae normal, reddish. Wings ample, flavescent, 

 stigma rufescent ; $ tegulae mainly flavous. Length, 15-18 mm. 



The pure flavous central segments of the $ are very conspicuous. 



This species w^as for long mixed with its immediate allies, till good dis- 

 tinctions were pointed out by Holmgren in his " Enumeration of the 

 Tyrolean Ichneumons." Marshall thought it synonymous with / sus- 

 piciosus, from which it may be known by the coarser puncturation of the 

 whole body, less buccate cheeks and narrower temples, as well as by the 

 9 scopulae. It is also very like /. confusorius in size and stature, differing 

 in the coloration of the abdomen and legs and the conformation of the 

 antennae. 



Stephens found this species rather scarce, in June and .July, on flowers 

 near London and in the north of England. It probably does not extend 

 to Scotland, being rare in northern Europe. Mr. Edward Saunders, f.r.s., 

 has given me a female w'hich he took at Seaton, in Devon, in May, 1899 ; 

 and there is another (probably from Surrey) in Dr. Capron's collection. 

 The female is often found during the winter, among moss, etc., in France. 



21. computatorius, AliiU. 



Ichnetimon coinpiitalorius, Milll. Brodr. 152 ; Gr. I. I''. 256 ; Ste. 111. M. vii. 158, ? ; 

 Wesm. Nouv. Mem. Ac. Brux. 1844, p. 50, 9 ? cJ ; Bui. Ac. Brux. 1S48, p 152; 

 Holmgr. Ichn. Suec. i. 53, excl. {, ; cf. Ent. Tidskr. 1S80, p. 28 et Tischb. Stelt. Zeit. 

 xxxiv. p. 419 ; Tlioms. xviii. 1920 ; cf. Ann. Soc. Fr. 1SS6, p. 19 ; Berth, lib. cit. 1S94, 

 p. 598, <5 9. I. fiisca/ns, Gr. I. E. i. 170, i (ncc Fab.). /. bicoloti/^es, Tisch. Stelt. 

 Zeit. 1868, i, I. maligniis, Tisch. lib. cil., 1881, J. Var. /. se//iiorbihxIis, var. I, 

 Gr. I. E. i. 212 ; Wesm. Mem. couron. Ac. Belg. 1859, p. 25, i (part.). 



Head black ; ? with apex of mandibles and usually the frontal orbits 

 red ; S with the mandibles sometimes centrally, two marks u])on, or the 

 whole centre of, the clypeus white, and the face whitish flavous with a 

 central black mark. Antennae of ? strongly compresso-dilaled, attenuate. 



