154 BRITISH ICHNEUMONS. 



known by its stout and apically attenuate antennae and by the abdominal 

 markings. 



Thomson is doubtful of the identity of Holmgren's 6 with Gravenhorst's 

 ? ; he observes that it is much like that of /. caiosce/is, ^Vesm., that it has 

 the apical joints of the posterior tarsi ri|fo-fuscous, the flagellum ferrugine- 

 ous beneath, the mesonotum very finely and densely punctate ; but, from 

 the mesonotal sculpture, he concluded it must be correctly here placed. 



Stephens, who follows Gravenhorst in describing incorrectly the sixth 

 and seventh segments of the S as dorsally white, records it as uncommon, 

 taken at Hertford, in July ; Bignell took it, at Bickleigh, in Devon, at the 

 end of June. . It extends throughout northern and central Europe, and 

 has been recorded from Algeria, by M. Pic. 



46. quadrialbatus, Grav. 



Ichnetimon quadrialbatus, Gr. Mem. Ac. Sc. Torin, 1820, p. 298 ; I. E. i. 252, excl. 

 i ; Ste. 111. M. vii. 156 (part.) ; Wesm. Nouv. M(5m. Ac. Brux. 1844, p. 42 ; Bui. Ac. 

 Brux. 1848, p. 151, ? ; Mem. couron. Ac. Belg. 1859, p. 30 ; Berth. Ann. Soc. Fr. 1894, 

 p. 589, i ? ; (/. Thoms. O. E. xviii. 1940. (?) I.fossorius, var. 2, Gr. I. E. i. 165, 

 excl. i Fennico. (?) Var. Ainblytcles cainelimis, Wesm. Bui. Ac. Brux. 1848, p. 299, i . 



Head of ? entirely black ; of c^ with facial orbits rarely white. An- 

 tennae slender ; of $ setaceous, white-banded with the flagellum generally 

 basally red ; of $ entirely, or beneath, ferrugineous, with scape usually 

 immaculate. Thorax black, of $ sometimes with an obscure red dot 

 before the radix ; areola sub-quadrate, apically hardly emarginate. Scu- 

 tellum distinctly convex ; usually entirely, of $ sometimes only apically, 

 white. Abdomen black, segments two and three sometimes laterally 

 castaneous or more or less badious, and $ with six and seven white- 

 marked ; post-petiole aciculate ; gastrocaeli rather large and deeply im- 

 pressed, not transverse, and hardly broader than the intervening space. 

 Legs slender, red ; all the coxae as well as apices of hind tibiae and their 

 tarsi black ; femora clear red ; hind coxae not scopuliferous. Wings a 

 little clouded ; stigma red, tegulae and radix piceous. Length, 1 2 mm. 



This species is very like /. cessafor, from which, however, its pale 

 scutellum will at once distinguish it. It is also extremely like Holmgren's 

 /. i?iops, in which the antennae and hind tarsi are stouter, the size larger 

 and the scutellum and anal spots less distinctly white ; the antennal band, 

 moreover, is wanting. 



Stephens, who incorrectly includes Gravenhorst's $, says it is not 

 common, but found in June, near London and at Darenth. Neither 

 Bridgman nor Bignell met with it, and I know of but few recent records ; 

 Col. Partridge has bred both sexes from Geometra sinafagdaria, in 

 October, and there is an old male in Marshall's collection. It has been 

 bred by Mocsary, from Leucania evidens, and has a wide distribution 

 throughout central Europe, where the female is known to hibernate, ex- 

 tending to Italy and France. 



47. cessator, Man. 



Ichneumon cessator, Mllll. Brodr. 158; Gr. I. E. i. 155; Ste. 111. M. vii. 138,?; 

 Wesm. Nouv. Mem. Ac. Brux. 1844, p. 40; Holmgr. Ichn. Suec. i. 123; cf. Ent. 



