204 BRITISH ICHNEUMONS. [Lissonota, 



15. cylindrator, Vill. 



Ichneumon cylindrator, Vill. Linn. Ent. iii. 180, ,? ? . /. clypeator, Gr. Mem. 

 Ac. Sc. Torin. 1820, p. 372, <? . Tryphon clypeator, Gr. I.E. ii. 131 ; Ste. 111. M. 

 vii. 233, (? . Lissonota cylindrator, Gr. I.E. iii. 102; Schaff E.G. cxvi. 22, ? ; 

 Holmgr. Sv. Ak. Handl. 1854, p. 93 ; lib. cit. 1860 n. 10, p. 51; Tasch. Zeits. Ges. 

 Nat. 1863, p. 284 ; Thorns. O.E. viii. 762 et xiii. 1418, c^ ? . 



A distinctly nitidulous species, punctate and black with short whitish 

 pubescence and the abdomen more or less indeterminately rufescent. 

 Head densely punctate, somewhat stout and not strongly narrowed be- 

 hind the eyes ; clypeus convex, apically rounded with the basal foveae of 

 the 9 somewhat conspicuous ; palpi infuscate or ferrugineous ; mandibles 

 lighter or darker ferrugineous, black or rarely flavous with their base and 

 apex black, labrum concolorous ; orbits of S sometimes obsoletely 

 flavous near the scrobes, of 9 sometimes next the frons or externally 

 narrowly flavescent. Antennae somewhat attenuate apically, black, of ^ 

 as long or nearly as long as the body, of 9 a little shorter. Thorax 

 densely punctate, subcylindrical and immaculate ; mesonotum confluently 

 punctate with obsolete notauli ; metathorax evenly punctate, more 

 roughly in (J, often centrally impressed ; petiolar area striate and always 

 basally entire. Scutellum black. Abdomen nitidulous, of (^ longer and 

 narrower, of 9 as long and as broad as the head and thorax, subcylindri- 

 cal, black; the two basal segments obsoletely aciculate and shining, 

 hardly smoother towards their apices; the following nitidulous 

 and obsoletely reticulate ; the four basal segments more or less narrowly 

 marked with indeterminate red ; first segment nearly twice longer than 

 broad, centrally diffusely punctate, with the two following quadrate and 

 the remainder transverse ; terebra longer than the body (body 9, terebra 

 II, mm.), black with the spicula castaneous. Legs fulvidous and normal, 

 more slender in J ; coxae and trochanters black, and sometimes castan- 

 eous-marked ; hind tarsi nigrescent ; claws large and double length of the 

 pulvilli. Wings normal and slightly clouded ; stigma and radius infuscate 

 or substramineous ; radix and the S tegulae whitish, latter in 9 rarely 

 concolourous, usually ferrugineous or testaceous ; areolet irregular, petio- 

 late or subpetiolate, emitting the recurrent nervure from beyond its centre. 

 Length, 8 — 12 mm. 



The extent of red colouration upon the central abdominal segments 

 varies from very nearly wanting to segments two to five entirely red, and 

 Gravenhorst mentions a variety with the abdomen pale castaneous and 

 only the anus black. The elongate claws will easily distinguish this from 

 other similarly coloured species ; I have found the distinctly paler apical 

 tarsal joint a very good and constant superficial character in both 

 sexes. 



