BRITISH ICHNEUMONS. lOI 



of the next genus which can be confused with it are A. vadaforius, whose 

 areola is much shorter, and A. negalo?-ii/s, whose areola is also short, with 

 head black. 



Tabic of Species. 



(2). I. Head obliquely narrowed behind ; fifth 



segment not white i. Fabricii, Grav. 



(i). 2. Head not obliquely narrowed behind ; 

 fifth segment white-marked. 



(4). 3. Mandibles stout ; apical segment mar- 

 gined with white 2. OCCISORIUS, Fab. 



(3). 4. Mandibles slender ; apical segment 

 marked with white. 



(6). 5. No white line beneath radix ; six and 



seven segments apically white 3. Gravenhorsti, Wesm. 



(5). 6. Line beneath radix white ; six and seven 



segments dorsally white 4. SEPTEMGUTTATUS, Grav. 



I. Fabricii, Grav. 



Ichneumon Fabricii, Gr. I. E. i. 616, 9 ; cf. Wesm. j\Iem. couron. Ac. Belg. 1859, 

 p. 77. /. »ieia>iocerits, Wesm. Bui. Ac. Brux. 1855, p. 377, ?. Aiiihlytcles Fabricii, 

 i'asch. Zeits. Ges. Nat. 1870 ; Berth. Ann. Soc. ¥x. 1895, p. 640, ? . Iclineuiitoii 

 ctihicularis, Desv. Cat. 15; Mori. E. M.M. 1902, p. 122, f, 9. 



? . A bright, red and black species. Head obliquely rounded behind 

 the eyes and narrowed towards the mouth ; mandibles bidentate ; clypeus 

 somewhat convex, finely punctate and apically truncate ; frontal orbits red 

 or white. Antennae slender, setaceous, black, lliorax entirely black ; 

 areola rectangular, longer than broad, apically emarginate. Scutellum flat, 

 shining, black. Abdomen sub-cylindrical, not strongly obtuse apically, 

 nitidulous, black ; segments two and three, the base of fourth and usually 

 apex of first, castaneous-red ; sixth and seventh white-marked ; post-petiole 

 aciculate ; gastrocaeli small, triangular ; second segment strongly and 

 somewhat closely punctate, the following becoming smoother apically. 

 Legs normal, black ; tibiae, except front ones externally and the posterior 

 at their apices, and the tarsi, red ; femora sometimes in part also red. 

 Wings a little clouded ; stigma piceous or ferrugineous, tegulae black ; 

 areolet pentagonal. Length, 8 mm. 



$ . Head obliquely narrowed behind the eyes and towards the mouth, 

 transverse with the vertex narrow ; frons evenly, face closely, and clypeus 

 sparsely punctate ; clypeus not separated, apically truncate ; black, internal 

 orbits, angles of clypeus, and the mandibles except their apices, flavous ; 

 palpi fulvous. Antennae setaceous, hardly thickened centrally, black 

 throughout. Thorax finely punctate, shining, black ; callosity before the 

 radix and the pronotum flavous ; areola sub-quadrate ; costulae entire ; 

 apophyses wanting. Scutellum flat, sparsely punctate and, except extreme 

 base, flavous. Abdomen cylindrical, dull, somewhat flattened dorsally, 

 not very finely punctate, incisures deeply impressed ; black with segments 

 two to four, and sides of the fifth at the base, red ; seventh nearly entirely, 

 sixth with a minute apical central dot, white ; post-petiole coarsely aciculate- 

 punctate, carinae strong ; gastrocaeli normal, deep, striate, with intervening 

 space punctate and slightly narrower than centre of post-petiole ; ventral 

 segments two to four plicate ; valvulae small, retracted ; ultimate segment 

 neither sinuate nor produced. Legs piceous, front femora at apex and 



