236 BRITISH ICHNEUMONS. 



I. marginellus, Grav. 



Ichnettmon ma7-ginellus, Gr. I. E. i. 192, i. Giiathoxys inargiiidhis, Wesm. Nouv. 

 M(5m. Ac. Prux. 1844, p. 168, i ; Bui. Ac. Brux. 1855, p. 416 ; Holmgr. Ichn. Suec. 

 iii. 382 ; Thonis. O. E. xv. 1615, 6 ? ; Brisch. Sclir. Nat. Ges. Danz. 1S78, n. 6, p. 52, 

 9. Stenodontits inargiiiellus, Berth. Ann. Soc. Fr. 1896, p. 346, i 9- 



A small black species, with red legs and partly white scutellum. Head 

 buccate ; occiput only slightly emarginate ; temples broad, shining, sparsely 

 punctate ; face closely punctate ; clypeus large, anteriorly broadly rounded 

 and depressed ; black, $ with internal orbits and cheeks, mouth and 

 usually two dots on the clypeus, stramineous, ? with palpi pale, mandibles 

 fulvous, clypeus basally rufescent and frontal orbits whitish. Antennae 

 sub-filiform ; of $ rather more than half length of body, black with scape 

 white, and flagellum ferrugineous, beneath ; of $ less than half length of 

 body, sometimes rufescent in centre beneath. Thorax narrower than head, 

 sub-cylindrical ; mesonotum shining, finely punctate ; metanotum rugulose, 

 areola rounded in front and longer than broad, especially in ? ; costulae 

 sometimes complete ; black, with pronotum and callosities at radix white. 

 Scutellum laterally white or fiavidous. Abdomen somewhat smooth, ob- 

 soletely punctate, with fine grey hairs ; black, with segments two to six 

 often apically pale; seventh usually narrowly white-marked. Legs red, 

 stouter in 5 ; (^ coxae red or black, the anterior white -marked. Wings 

 hyaline ; stigma fusco-testaceous, radix and tegulae stramineous ; areolet 

 somewhat narrowed above. Length, 5-7 mm. 



The only other European species of this genus, S. fiasufj/s, Wesm., is 

 also likely to occur in Britain, since it is found in France, Germany, etc. 

 From the above, it may be known by the white flagellar band of the $ , 

 and the entirely white face of the ^ , which also has the antennae flavous 

 beneath. 



S. ma7-ginenus was first taken with us by Bignell, at Plym Bridge, to- 

 wards the end of September, 1881 ; Dr. Capron records it from Shiere, 

 in 1885 (E.M.M. 1886, p. 264); Piffard has given me an example from 

 Felden, in Herts. ; and I have swept it from Vicia saliva, in Bentley 

 Woods, near Ipswich, towards the end of June, and taken it at Gosfield, 

 in Essex. It is probably overlooked and not uncommon in Britain, since, 

 on the Continent, where the female hibernates, it is somewhat widely 

 distributed, though I am not aware that it has yet been bred. 



Sub-tribe. 

 PHAEOGENINI. 



Table of Genera. 



(26). I. Mandibular teeth of more or less unequal length ; frons rarely 

 glabrous. 

 (3). 2. Clypeus quadrate ; metathorax biden- 



tate I. Apaeleticus, Wesm. 



(2). 3. Clypeus transverse ; apophyses want- 

 ing or sub-obsolete. 



(23). 4. Scutellum simply convex. 



(22). 5. Metathorax not apically produced 

 above hind coxae. 



(17). 6. Second segment with distinct trans- 

 verse basal impression. 



