Polyblastus | BRITISH ICHNEUMONS. 291 

(10). 11. Hind legs not entirely black; abdo- 
men paler. 
(19). 12. Anus always black; hind femora 
usually red. 
(16). 13. Basal segment narrow and elongate ; 
tarsi usually banded. 
). 14. Wings subinfumate; hind tibiae 
always white-banded 8 = 
(14). 15. Wings deep piceous; hind tibiae en- 
tirely black .. 6. COTHURNATUS, Grav. 
5. VARIITARSUS, Grav. 
(13). 16. Basal segment broad, not elongate ; 
tarsi not banded. 
(18). 17. Vertex quadrate ; 1st segment later- 
ally straight ws a .. 7. SPHAEROCEPHALUS, Gr. 
(17). 18. Vertex and 1st segment both dis- 
tinctly rounded ye si _.. 8. PASTORALIS, Grav. 
(12). 19. Anus rarely black; hind femora 
always partly black s .. 9. PRATENSIS, Grav. 
(9). 20. Areolet wanting. 
(22). 21. Scutellum at most basally margined 10. RIVALIS, Holmgr. 
(21). 22. Scutellum strongly margined righ 
round its apex 8 Be .. II, MARGINATUS, Holmgr. 
(6). 23. Abdomen black; hind tarsi not 
white-banded. 
(27). 24. Metanotal areae wanting or strongly 
obsolete. 
(26). 25. Stigma flavidous ; segments convex, 
incisures deep ies = .. 12. PINGUIS, Grav. 
(25). 26. Stigma black; abdomen uniformly 
subdeplanate oH ee .. 13. WESTRINGI, Holmgr. 
(24). 27. Metanotal areae entire and very dis- 
tinct. 
(33). 28. Areolet entire; basal segment usually 
scabriculous. 
(30). 29. Ungual pectination strong; meso- 
thorax red ~: e ae .. 14. SANGUINATORIUS, #22. 
(29). 30. Ungual pectination normal; thorax 
black. 
(32). 31. Hind tibiae and centre of smooth ab- 
domen testaceous .. oe .. 15. WAHLBERGI, Holmgr. 
(31). 32. Hind tibiae white-banded; abdomen 
black, scabriculous me .. 16. SUBALPINUS, Hlolmgr. 
(28). 33. Areolet wanting; abdomen nitidu- 
lousthroughout ... 
é .. 17. MELANOSTIGMUS, A/gr. 
(3). 34. Scutellum very strongly elevated, sub- 
pyramidal. 
(36). 35. Petiolar spiracles simple; costulae 
entire ts as 4 .. 18. PYRAMIDATUS, Hlolmgr. 
(35). 36. Petiolar spiracles dentiform; cos- 
tulae wanting ie “a .. Ig. BIDENTATUS, SZeph. 
1. annulicornis, Gir. 
Polyblastus annulicornis, Giraud, Ann. Soc. Fr. 1871, p. 406, ?. P. grossus, 
Brisch. Schr. Phys. Ges. Kénig. 1871, p.94, ¢; Schr. Nat. Ges. Danz. 1878, 
p. 100, ¢. 
A short and stout species, black and shining, hardly punctulate and but 
little pubescent. Head transverse and not constricted posteriorly ; mouth, 
clypeus, the subquadrate face and cheeks whitish ; clypeus convex, api- 
cally rounded and basally discreted; mandibles stout and curved, with the 
T2 
