I20 



BRITISH ICHNEUMONS. 



\Hemileles. 



(72). 11. 



Segments with no impression ; 

 hind tibiae normal. 



F>asc of abdomen entirely red ... y] . HIANNULATUS, Craz/. 



r>ase of abdomen at least black. 



At most two central segments 

 pale. 



Second segment longitudinally 

 striate or aciculate. 



Second segment alone striate ... 38. Hl'.MlPTl'lRUS, /vf(5. 



Second and third segments 

 aciculate 39. scrupulosus, Griw. 



Second segment glabrous or 

 punctate. 



Mctathorax with transverse cos- 

 tae ; abdomen punctulate. 



Clypeus distinctly discreted ; 

 mouth parts white 40. CHIONOPS, Grav. 



Clypeus not discreted ; mouth 

 parts not white 41. RUFOCINCTUS, Grav. 



Metathorax with no distinct cos- 

 tae ; abdomen totally glabrous. 



Post-petiole aciculate ; antennae 

 tricoloured 42. VARICORNIS, Grav. 



Post-petiole scabriculous ; an- 

 tennae bicoloured 43. DUBIUS, Grav. 



More than two segments pale. 



Metathorax rugulose with apo- 

 physes sub-acute. 



Front tibiae sub-inflated ; lateral 

 metathoracic costae wanting... 25. FLORICOLATOR. ^^^^■~ 



Front tibiae normal ; lateral 

 metathoracic costae usually 

 entire. 



Post-petiole rugose or punctate. 



Basal segment carinate and the 

 central callose 44. RIDIBUNDUS, Grav. 



Basal segment not carinate nor 

 the central callose 45. BALTEATUS, Thorns. 



Post-petiole aciculate. 



Petiolar area oblique. 



Coxae and trochanters black ... 46. IMBECILLUS, Grav. 



Coxae and trochanters red 47. PERSECTOR, /".r^r/; 



Petiolar area sub-vertical. 



Segments two to six red 48. TENUICORNIS, Grav. 



Segments two to four red. 



Second segment nearly smooth ; 

 post-petiole narrower 49. OXYPHIMUS, G7'av. 



Second segment punctate ; post- 

 petiole broader 50. MERIDIONALIS, GraV. 



Metathorax punctate or smooth 

 with apophyses obsolete. 



Frons and mesonotum pubescent 

 and dull. 



Head, thorax and abdomen sub- 

 glabrous 51. MACRURUS, TJioms. 



Head and thorax pubescent, ab- 

 domen finely punctate 52. ARGENTATUS, Grav. 



Frons and mesonotum nitidulous. 



Flagellar joints apically incras- 

 sate ; anus black 53. NITIDUS, -^r/^^. 



