44 BRITISH ICHNEUMONS. 



was / deliraforius, Grav. ; the male rarely has the face entirely black. The 

 var. /. atrocaeruleus, Tisch., has the abdomen bluish and the stigma 

 fuscous. 



The female differs from S. culpaior in the thoracic markings and 

 scutellum, the yellowish band of the antennae, which are a little more 

 compressed centrally, and in the scopulae, which are not tuberculate. 

 Both sexes are at once known by the white coloration of the legs, which 

 superficially allies this species with /. deliraforius. 



Rare ; taken at Darenth, in June (Stephens). — Captured at Bickleigh, 

 in Devon, 20th August (Bignell). Probably rarer than the preceding 

 species. Col. Yerbury has sent me the male from Golspie, in Sutherland, 

 where he found it early in August ; and it is also recorded from Essex. It 

 has been bred, from Orgyia pndibu7ida, on the Continent, where it is 

 widely distributed. 



3. trilineatus, Gmel. 



Ichneumon trilineatus, Gmel. S. N. i. 2679,?; Gr. I. E. i. 173; Ste. III. M. vii. 

 142 ; Wesm. Nouv. M6m. Ac. Brux. 1844, p. 35 ; Bui. Ac. Brux. 1848, p. 149 ; lib. 

 cit. 1857, p. 368 ; Holnigr. Ichn. Suec. i. 46 ; Berth. Ann. Soc. Fr. 1894, p. 569, i 9 . 

 Stenichneumon trilineatus. Thorns. O. E. xviii. 1966. /. Brischkii, Ratz. Ichn. d. 

 Forst. iii. 170. /. adulator, Tisch. Stett. Zeit. 18S1, S. Var. /. umbraculosus, Gr. 

 I. E. i. 199 ; Ste. 111. M. vii. 146, i 9 . 



A rather dull, black species, with the sides of the scutellum always pale. 

 Head narrowed behind the eyes ; cheeks elongate ; mandibles not stout ; 

 angles of clypeus rounded, and face triangular ; frontal orbits narrowly, 

 and a vertical dot sometimes absent in $ , flavidous-white ; mouth piceous ; 

 $ also with palpi, mandibles, sides of clypeus and of face, and part of 

 external orbits, whitish. Antennae slender, setaceous, basally reddish ; of 

 ? more or less white-banded ; $ with scape flavidous beneath. Thorax 

 dull ; black, with pronotum and callosities in c?, and the latter sometimes 

 in $ , flavidous ; mesonotum closely punctate ; metathorax with no basal 

 sulcus, somewhat smooth, and finely scabrous ; the upper areae complete, 

 of which the areola is the most smooth, slightly longer than broad (at least 

 in $ ), rounded at base, apically rectangular with the margin generally 

 incomplete. Scutellum coarsely punctate, obtuse, apically depressed ; 

 black with the lateral, but not the basal, margin pale. Abdomen some- 

 what slender, of $ lanceolate, of ? elongate-oval ; closely punctate, more 

 shining towards apex ; usually entirely black ; post-petiole closely aciculate, 

 apical angles slightly obtuse ; second segment rarely castaneous in $ , often 

 centrally striolate throughout, its apical incisure and that of third deeply 

 impressed ; gastrocaeli transverse and deep, often castaneous, extending 

 nearly to margin, the intervening space narrower than the centre of post- 

 petiole ; terebra slightly exserted. Legs rather slender ; black, with femora 

 and tibiae for the most part piceous or ferrugineous, hind ones often 

 black ; hind coxae closely punctate. Wings hyaline, with stigma and 

 tegulae blackish ; sides of areolet nearly or quite coalescing above. 

 Length, 12-15 J^i"^- 



The legs are sometimes blackish throughout (/. Jinihraculosus, Grav.), or 

 the hind tibiae apically black ; the female may have the apex of first and 

 whole of second and third segments castaneous ; males have been known 

 with white-banded antennae. 



Very closely allied to the next species, but the head is narrower behind 



