INTRODUCTORY PAPERS ON ICHNEUMONID^. 281 



■^-^ The 5th segment the widest. - - 51, migrator, 3 — 4^ lines. 

 ■^*^^ The 2nd segment the widest. - - 54. fumipennis, 3 — 4 Hnes. 

 tf Hind tarsi not white ringed. - - 56. t»cM6/<or, 2}— 3 lines. 

 ** Base of hind tibiae not white. 



§ Coxae and trochanters red, hind tarsi white-ringed. 

 X Apical joint of hind tarsi about three times as long as wide. 



57. carnifex, var., 4| — 6 lines. 

 X X Apical joint of hind tarsi about four times as long as wide. 



57. elegans, 6 lines. 

 §§ Coxse and trochanters black. 



Middle and hind tarsi white- ringed. - 47. peregrinator, '2 — 4 lines- 

 00 Hind tarsi onl}-^ white-ringed. - - - 48. ornatus, 5 lines. 



Section 6. — Scutellum pale; abdomen red and black, apex white. 



A. Metathoracic spiracles elongate and large (females). 



a. Antennae and hind tarsi white-ringed. - 43. confector, 4 lines. 



b. Antennae white-ringed, but not the hind tarsi ; aculeus about one-half 



of abdomen. 



* Hind femora red, apex black. ... 42. adustus, 4 lines. 

 *=>= Hind femora entirely black. - - - 45. nigri2)es, 4 lines. 



B. Metathoracic spiracles small and round, or nearly so (females). 

 Antennae white-ringed ; aculeus about one-half of abdomen. 



a. Coxae red. 48. tricolor, 2^ — 3 lines. 



b. Coxae black. 49. fugitivus, 2^ — 3J lines. 



C. Spiracles of metathorax large and elongate (males). 



Femora and tibiae red, apex of hinder black ; internal orbits and ring 

 of antennae white. - - - 46. tinctorius, 3 — 4 lines. 



D. Spiracles of metathorax small and circular (males). 



a. Hind tibiae white at the base. 



* Hind tarsi white-ringed. 



51. migrator \ar. ,fuiiiipennis and cimbicis var. See section 5. 

 =i=* Hind tarsi not white-ringed, 

 f Apex of 1st segment white. - - 55. pygoleucus, 2^ — 3 lines, 

 ft Apex of 1st segment not white. - 56. incubitor ? 2^ — 3 lines. 



b. Hind tibiae not white at the base. 

 -I- Hind tarsi white-ringed. 



f Middle tarsi white-ringed. - 47. peregrinator var., 2 — 4 lines, 



tt Middle tarsi not white-ringed. - - - 49. fugitivus, 8 lines. 



-■1= Hind tarsi not white-ringed. 



1 3rd segment red, with a black band. - 50. subcinctus, 3|- lines. 

 II 1st to 4th segments red. - - - 48. tricolor, 2^ — 4 lines. 



Subdivision II. — Thorax more or less red. 



A. Abdomen black, anus white; antennae black; scutellum yellow (male 



and female). ----- 59. signatorius, 2^ lines. 



B. Abdomen yellowish red, petiole and from the 4th segment black ; 



antennae tricoloured (female). - 33. minutorius, 2^ — 3 lines. 



C. Abdomen tricoloured. 



a. Scutellum or post-scutellum more or less red (male and female). 



57. carnifex, 4^ — 6 lines. 



b. Scutellum white (female). - - - 58. rufoniger, 2^ lines. 



2o 



