i86 



BRITISH ICHNEUMONS. 



Central segments broadly flavous ; 

 antennae not banded. 



Apophyses large ; fourth ventral 

 segment of (J plicate i8. AKUATORllJS, Forsf. 



Apophyses normal ; fourth ventral 

 segment of (J not plicate ig. INFRACTORIVS, Pa?tz. 



Central segments not broadly fla- 

 vous ; antennae usually white- 

 banded. 



Tibiae broadly pale-banded. 



Co.xal area indistinctly discreted ; 

 tibiae white 20. ORATORIUS, Fad. 



Coxal area distinctly discreted ; 

 tibiae flavidous 21. MARGINEGUTTATUS, Grav. 



Tibiae not pale-banded 22. microcephalus, Sh^p/i. 



Scutellum black : abdomen strongly 

 punctate, apically red 23. CASTANOPYGUS, S/e/>/i. 



Mandibles unidentate ; hypopygium 

 of (^ acuminate. 



Metathorax not emarginate at base 

 of apophyses 24. UNIGUTTATUS, 6'r(27/. 



Metathorax emarginate at base of 

 apophyses 25. CONSPURCATUS, Cn??/. 



I. punctus, Grav. 



Ichneumon pnnctiis, Gr. I. E. i. 323, i ; Ste. 111. M. vii. 169 ; 

 Ac. Brux. 1844, p. 49, (5 ? ; cf. Thorns. Ann. Soc. Fr. 1886, p. 

 I. E. i. 332,9, excll. varr. et (5 ; Ste. III. M. vii. 170 (part.). 

 Thorns. O. E. xix. 2091 ; Berth. Ann. Soc. Fr. 1895, p. 648, i 9. 



Wesm. Nouv. M^m. 



23. /. deceptor, Gr. 



Amhlyteles punctus, 



Var. /. leuconielas. 



Gr. I. E. i. 255, excl. 9 ; cf. Wesm. M^m. couron. Ac. Belg. 1859, p. 29. 



A distinctly slender species. Head narrowed behind the eyes, black 

 with the internal orbits of the c?, and sometimes the frontal of the $, 

 white ; mandibles bidentate, those of $ and the angles of the clypeus 

 sometimes white. Antennae somewhat slender, setaceous ; of $ white- 

 banded, of $ with scape white beneath. Thorax black with usually the 

 pronotum and, in $, dots before and beneath the radix white; areola 

 transverse or sub-quadrate, costulae obsolete. Scutellum white. Ab- 

 domen elliptic, strongly punctate ; black with the first three, and base 

 of fourth, segments dark red ; five to seven white-marked, post-petiole 

 strongly aciculate ; gastrocaeli somewhat small and deeply impressed ; 

 fourth ventral segment of $ plicate, fifth of $ shorter than the apical. 

 Legs somewhat slender, black ; tibiae, except apices of posterior, and 

 sometimes all the femora, red ; front tibiae of $ flavous. Stigma piceous 

 or ferrugineous. Length, 12-15 '^'^• 



This species is included in Marshall's catalogues in the genus Ichneumon, 

 from which the $ may be known by the relative length of its apical ventral 

 segment and by its obtuse anus. Thomson in "Annales" says it is related 

 to Ctenichneunwn nielanocastaims in the form and sculpture of the ab- 

 domen and not spirally contorted antennae, but in " Opusc. Ent." he 

 retains it in his genus Aniblyteles. 



It occurs in central and northern Europe, where it has been bred from 

 Caradrina Kadenii, on flowers in July ; but it would appear to be very 

 rare in Britain, having once been found near London and once taken at 



