
218 BRITISH ICHNEUMONS. [ Mesoleptus 

(16). 15. Notauli wanting ; metathorax sub- 
glabrous... ae * .. 6. FUGAX, Grav. 
(15). 16. Notauli distinct ; metathorax rugu- 
lose. 
(18). 17. Fenestrae discreted by a line; an- 
tennae stouter : $i 
(17). 18. Fenestrae discreted by a dot ; an- 
tennae more slender ae 8. VULNERATUS, Ze?t. 
(4). 19. Petiolar spiracles before centre ; post- 
petiole subexplanate [ALEXETER, 
Forst. ]. 
(21). 20. Body Are testaceous, hind femora 
concolorous g. TESTACEUS, Fad. 
(20). 21. Body mainly black, hind femora often 
concolorous. 
(23). 22. Nervellus intercepted below centre; 
hind femora black .. 10. RUFICORNIS, Grav. 
(22). 23. Nervellus intercepted in centre ; hind 
femora red .. I1. ATTENUATUS, Bridg. 
(3). 24. Front wings with no trace of areolet 
[MESOLEPTUS, Forst. ]. 
(26). 25. Abdomen black with incisures flaves- 
cent 7. . 12. CINGULATUS, Grav. 
(25). 26. Abdomen broadly red in the centre 13. PROSOLEUCUS, Grav. 
(2). 27. Cheeks subglabrous, with extremely 
obsolete sculpture. 
(29). 28. Areolet wanting; legs slender; scu- 
tellum black [PHOBETES, Forst.]. 14. LEPTOCERUS, Grav 
(28). 29. Areolet entire; legs stout; scutellum 
pale [GAUSOCENTRUS, Forst. ]. 
(31). 30. Face and femora pale; stigma tes- 
taceous ih .. 15. MACRODACTYLUS, AZgr. 
(30). 31. Face and hind femora black; ‘stigma 
nigrescent .. 16. SORDIDUS, Grav 
(1). 32. Thorax with prosternum and radical 
dots alone pale... as .. 17. GLACIALIS, Wolds¢é. 
. XANTHOSTIGMA, Grav. 
“Nr 
1. indefessus, Grav. 
Ichneumon indefessus, Gr. Mem. Ac. Sc. Torin. 1820, p. 364, ¢. Mesoleptus 
typhae, var. 2, Gr. I. E. ii.64, 9. M. indefessus, Ste. Ill. M. vii. 222, 2. M. 
femoralis, Holmgr. Sv. Ak. Handl. 1855, p. 105; Brisch. Schr. Nat. Ges. Danz. 
1878, p. 68, ¢ ?. Hadrodactylus femoralis, Thoms. O. E. ix. 920 et xix. 
1979, 3 2. 
A finely punctulate black species, with black hind femora. Head not 
constricted posteriorly ; mouth, clypeus and face, flavous; clypeus de- 
planate, punctulate and apically subtruncate. Scape flavous, and flagellum 
red, at least beneath. ‘Thorax as broad as head; metathorax subrugu- 
lose, with indeterminate discal areae. Abdomen black, with usually the 
second to fourth segments red; basal segment narrow but not slender, 
elongately sulcate discally, with postpetiole acutely margined laterally. 
Legs red with all the coxae, hind femora and apices of their tibiae 
broadly nigrescent, their trochanters usually flavescent ; hind tarsi always 
infuscate ; all femora somewhat stout; anterior coxae sometimes pale 
and hind tibiae rarely mainly nigrescent. ‘Tegulae flavous, stigma infus- 
cate and somewhat narrow ; areolet petiolate; nervellus subopposite and 
intercepted nearly in its centre. Length, 11 mm. 
