BRITISH ICHNEUMONS. 



107 



(93). 60. Scutellum pale. 



(66). 61. Size 17 mm. or more. 



(63). 62. Apophyses distinct 30. PRIMATORIUS, Fi9r.y/. 



(62). 63. Apophyses sub-obsolete. 



(65). 64. Femora black 31. bisignatus, G^r^z/. 



(64). 65. Femora red 32. BELLIPES, TF^^yw. 



(61). 66. Size 16 mm. or less. 



(80). 67. Anus with three pale marks, rarely 

 obsolete in ^ ; hind tarsi infuscate. 



(75). 68. Abdomen centrally clear red or 

 flavous. 



(72). 69. Anterior femora immaculate. 



(71). 70. Antennae of ^ dark red or black, $ 



central band five-jointed S3- GRACILICORNIS, Grav. 



(70). 71. Antennae of ($ clear red beneath, $ 



central band two-jointed 34. SILACEUS, Grav. 



(69). 72. Anterior femora black-marked. 



(74)- 73- Segments two and three of $ im- 

 maculate ; clypeus of (J flavous- 

 marked 35. EMANCIPATUS, JVesm. 



(73)- 74- Segments two and three of $ partly 



black ; clypeus of (J not flavous... 36. FORMOSUS, Grav. 



(68). 75. Abdomen centrally black or badious. 



(77). 76. Callosity beneath radix alone white... 37. quaesitorius, Z/;;«. 



(76). 77. Callosities beneath and before radix 

 white. 



(79). 78. Flagellum pale-banded 38. Haglundi, 7%//;/^r. 



(78). 79. Flagellum not pale-banded 39. PICEATORIUS, IVesm. 



(67). 80. Anus with two pale marks, wanting 

 in ^ ; hind tarsi mainly pale. 



(90). 81. Abdomen centrally clear red or 

 flavous. 



(83). 82. Mandibles slender, edentate 40. rufidens, W^^.y;«. 



(82). 83. Mandibles normal, bidentate. 



(85). 84. Hind tarsi immaculate ; hind tibiae 



of ? mainly flavous 41. CALOSCELIS, Wesin. 



(84). 85. Hind tarsi apically infuscate ; hind 

 tibiae of $ not flavous. 



(87). 86. Antennae of $ centrally incrassate ; 



scutellum of (^ convex 42. INSIDIOSUS, JVesm. 



(86). 87. Antennae of $ not incrassate ; scu- 

 tellum of (J strongly elevated. 



(89). 88. Abdomen elongate, sub-linear 43. SUBCYLINDRICUS, 6^rrtz/. 



(88). 89. Abdomen of ? elliptic-oval 44. raptorius, Grav. 



(81). 90. Abdomen centrally black or badious. 



(92). 91. Hind femora black 45. SUEMARGINATUS, G^rar'. 



(91). 92. Hind femora red 46. QUADRIALBATUS, Grat/. 



(60). 93. Scutellum black or rufo-castaneous. 



(95). 94. Abdomen centrally black 47. CESSATOR, J/«7/. 



(94)- 95- Abdomen centrally red. 



(97)- 96. Head not impressed behind ocelli ; 



post-petiole scabriculous 48. STIGMATORIUS, Zc//. 



(96). 97. Head impressed behind ocelli ; post- 

 petiole sub-aciculate 49. VULNERATORIUS, Ze/f. 



(59)- 98- Anus of $ immaculate ; scutellum of 



c? white at apex only 50. haesitator, IVcsm. 



The species of this genus are so extremely closely allied as, in many 

 cases, to defy discrimination by any but a well-practised eye, therefore I 



