Microcryptus.] BRITISH ICHNEUMONS. 2$ 



(22). 25. Spiracular area not right-angled ; 

 scutelluni of c? white, of $ usually 

 rufescent. 



(27). 26. Head distinctly narrowed pos- 

 teriorly ; frontal orbits white ... 13. .\RRIDENS, CT/r^f. 



(26). 27. Head less distinctly narrowed pos- 

 teriorly ; frontal orbits of $ not 

 white. 



{2)2>)- 28. Clypeus not apically produced in 

 the centre. 



(30). 29. Anus white 14. oal.actinus, Grav. 



(29). 30. Anus not white. 



(32). 31. Frons of $ not finely punctate ; 



wings of 9 normal 15. LEUCOSTICTUS, 6'r<?7/. 



(31). 32. Frons of ^ finely punctate ; wings 



of 9 rudimentary 16. NIGROCINCTUS, Grav. 



(28). 2>3- Clypeus apically produced in the 

 centre. 



(35)- 34- Basal segment normal ; coxae black ; 



petiolar area elongate 17. CR ETATU.s, Grav. 



(34)- 35- Basal segment stout ; co.xae white ; 



petiolar area normal 18. larvatus, G'/v^t/. 



(21). 36. Petiolar area not elongate ; frontal 

 orbits immaculate. 



(38)- 37. Tibiae basally white-banded 19. BASIZONIUS, Cniz'. 



(37)- 38- Tibiae not white-banded. 



(46). 39. jMetathoracic costae distinct ; $ ma- 

 cropterous. 



(41). 40. Petiolar area reaching centre ; ab- 

 domen sericeous 20. seric.\n.s, Grav. 



(40). 41. Petiolar area not reaching centre ; 

 abdomen sparsely pilose. 



(43). 42. Areola basally incomplete ; hind 



tarsi white-banded 21. TRiciN'CTUS, Grav. 



(42). 43. Areola entire ; hind tarsi not white. 



(45). 44. Mesopleurae rugulose ; metapleurae 



irregularly rugulose 22. ERYTHRl.NUS, Gra7'. 



(44). 45. Mesopleurae coriaceous ; meta- 

 pleurae transcostate 23. sperator, J/////. 



(39). 46. Metathoracic costae $ sub-obsolete ; 

 $ brachypterous. 



(50). 47. Clypeus oi $ apically produced ; 9 

 thora.K black. 



(49). 48. Head twice broader than thorax 24. graviceps, Marsh. 



(48). 49. Head of normal breadth 25. draciivpterus, r7;-(t7/. 



(47). 50. Clypeus of $, not produced ; ? tho- 

 rax mainly red. 



(52). 51. Basal segment of 9 only partly red ; 

 <^ with orbits pale and clypeus 

 black 26. MiCROPTERU.s, Grav. 



(51). 52. Basal segment of 9 entirely red ; ^ 



orbits black and clypeus pale ... 27. i.ahralis, Grav. 



A Colour Tabic of the Males. 



(20>. I. Srutellum at least partly white. 



(3). 2. Anus broadly white 8. CRAMINK oi.A. 



(2). 3. Anus not white. 



(5). 4. Tibiae white-banded 19. BA.SIZONIUS. 



