BRITISH ICHNEUMONS. 2O5 



from Sweden ; and Wesmael also mentions it from Germany, France and 

 Switzerland. 



24. uniguttatus, Gmv. 



IcJiuejivtou vuigtittatiis, Gr. I. E. i. 310 ; Ste. 111. M. vii. 167. Amhlytclcs ttnigut- 

 tatiis, Wesm. Noiiv. ]\It5m. Ac. Brux. 1844, p. 124; Bui. Ac. Brux. 1848, p. 297 ; hb. cit. 

 1854, p. 102; Tisch. Stett. Zeit. 1875, P- 274; Berth. Ann. Soc. Fr. 1895, pp. 600, 641, 



i ? . Var. /. interjccliis et /. suhfascialtis, Tisch. Stelt. Zeit. 1879, i 9 • Var. /. ain'pes, 

 Gr. I. E. i. 309 ; Ste. 111. M. vii. 167, ?. Var. /. iulerruptits, Gr. I. E. i. 319, i ; cf. 

 Wesm. Mem. couron. Ac. Belg. 1859, p. 37 ; et Tisch. Stett. Zeit. 1875, P- 274. Var. 

 I.Jlavolimbatus, Gr. I. E. i. 316, S ; cf- Wesm. Bui. Ac. Brux. 1854, p. 115. Var. /. 

 (juadriiiiigiilaiiis, Gr. I. E. i. 297; Wesm. Bui. Ac. Brux. 1854, p. 104, <J . Var. /. 

 fraedalor, Fonsc. Ann. Soc. Fr. 1847, p. 61, $ . Var. I. prateiisis, Gr. I. E. i. 212; Ste. 

 111. M. vii. 149, c5 ; cf. Wesm. Bui. Ac. Brux. 1854, p. 103. Var. /. Goedarti, Gr. I. E. 

 i. 474; Ste. 111. M. vii. 189 ; Ainblytelcs Goedarti, Wesm. Nouv. Mem. Ac. Brux. 1844, 

 p. 125; Bui. Ac. Brux. 1854, p. 107, i ? . Var. I.fii/in'gator, Gr. I. E. i. 537, excli. varr. 

 I, 3 [iiec Fonsc), ? ; Ste. 111. M. vii. 195 ; Amblytelcs alternator, Tisch. Stett. Zeit. 1879, 



9 . Var. A. inipressiis, Tisch. Stett. Zeit. 1879, 6 . Var. /. sibilaiis, Gr. I. E. i. 528, 6 ; 

 cf. Wesm. Nouv. Mem. Ac. Brux. 1844, p. 125. Var. I. fossoriiis, var. 3, Gr. I. E. i. 165 ; 

 cf. Wesm. Mem. couron. Ac. Belg. 1859, p. 17. Var. I. ftavifemur, Tisch. Stett. Zeit. 

 1S73, (J . Var. /. ignottis, Fonsc. Ann. Soc. Fr. 1S47, p. 61 ; Amblytelcs igiiotus, Wesm. 

 Bui. Ac. Brux. 1854, p. 106, 6. 



Head obliquely narrowed behind the eyes ; mandibles uni-dentate, the 

 lower tooth being entirely wanting ; $ with facial orbits rarely white. 

 Antennae somewhat stout, setaceous, strongly attenuate, black ; of $ 

 sometimes centrally fulvous above, with sixth flagellar joint quadrate ; of S 

 with the joints of basal two-thirds of flagellum cylindrical. Thorax black ; 

 S often has pronotum, and lines before and beneath radix, white ; meta- 

 thorax not emarginate at the base of the distinct apophyses ; areola sub- 

 quadrate or, in S, transverse; costulae wanting ; apophyses stout, obtuse. 

 Scutellum entirely or partly white (in type form). Abdomen black, nili- 

 dulous towards its apex ; of $ elliptic, of ? sub-ovate ; second segment 

 red ; third of S black with base and sides red, of $ red, sometimes black- 

 margined ; the seventh with a small dorsal white dot (in type form) ; post- 

 petiole aciculate ; gastrocaeli, especially of ? , small ; fourth ventral seg- 

 ment of c? not plicate, the ultiinate with a long apical process. Legs 

 somewhat stout, black ; coxae (of type form) black ; tibiae laterally red 

 or, in S , sometimes dull flavous. Wings somewhat clouded, stigma red 

 or piceous ; radix and tegulae of $ (type form) white-dotted. Length, 

 14-17 mm. 



Two reliable points will at once distinguish this species from our others 

 of the genus, viz., the mandibles are uni-dentate and the metathorax is not 

 emarginate at the base of the spines. From the Continental species of 

 the uni-dentate group, the present may be known by its stout antennae, 

 of which the flagellar joints of the $ become quadrate at the sixth, its 

 distinctly bispinate metathorax, and shining abdomen. 



The varieties which have been described as distinct species are very 

 numerous ; the following eight have the anus white-marked. Ichneumon 

 interfectiis has segments six and seven white-marked — this occurs in Greece 

 and Austria; atripes is a $ with antennae semi-white-banded and seg- 

 ments five to seven white-margined — Stephens records this as rare, near 

 London, the female is said to hibernate ; in/erruj>liis, Grav., has femora, 

 tibiae and tarsi red, with segments four to six laterally margined at apex, 

 and seventh marked, with while ; the var. nifinus, Berth., differs from this 



