INTRODUCTORY PAPERS ON ICHNRUMONIDiE. 225 



I Aculeiis about one-fourth or one-tliird of abdomen. 



8. fuinator, If — '■i lines. 

 II Aculeus half of abdomen. - - 1'6. jmUator, 11 — Inline. 

 Ill Aculeus ratlier shorter tlian the abdomen. speculator, '4^ lines. 

 jr\ •,2nd to 5th segments red; aculeus half of abdomen. 



17. vdf/ans, '2 lines. 

 b. Metathoracic arete incomplete. 



•^nd to 7th abdomhial segments red. 48. scuticus, 3 — S\ lines. 



B. AnteniuB black, red at the base (females). 



a. Metathoracic areiB complete. 



■•'• 1st al)dominal segment distinctly aciculate. 



f 2ud segment polished, at the most with very scattered punctures 



or aciculations. 

 I Aculeus about half of abdomen ; legs red, or almost entirely so. 

 § 2nd abdominal segment red. - nanus, 1^ to nearly 1^ Ime. 

 §§ 2nd and 3rd segments red, ith more or less so. 



7. rufulus, about 2i lines. 

 II Aculeus very short; middle of iibdonieu red. 



6. variabilis, 2i lines. 

 if '2nd segment finely aciculate ; aculeus about one-fourth of abdomen. 



X Co.xae black. 33. semipoUtus, 3 lines. 



X X Coxae red. 12. (Breus, 2 lines. 



** 1st abdominal segment polished, or with very scattered punctures 

 or aciculations. 

 f Middle and hind tibiae not spined along the outside. 

 I 2nd and 3id abdominal segments, and greater part of legs, red. 



18. ovatus, 2^ lines. 

 II Abdomen red, 1st segment more or less black. 

 § Aculeus at least one-third of abdomen. 

 X Hind femora red. - - - 19. hitinctus, 2 — 2i lines. 



X X Hind femora more or less black. 



Legs red, greater part of hind femora black. 



24. plagiator, \\ — 3 lines. 

 00 Tibiae and apex of front femora red. 25. erythrugaster, 'Z lines. 



§§ Aculeus very short; legs red. - - 20. exiguus, 1| line, 



ff Middle and hind tibiae with spines along the outside. 



35. vagahundus, 3 — 4 lines. 



b. Metathoracic arese not complete. 



Segments 1st to 4th, front femora and tibiae, red. 



42. rujinus, 3 lines. 



C. Antennae red-ringed (females). 

 Metathoi'acic areae complete and distinct. 



=;= 1st segment distinctly aciculate. 



Middle of abdomen and legs almost entirely red. 



7. rufulus, '<i\ lines. 

 ** ] st and 2ud segments polished. 



Abdomen red, petiole black : tibiae and apex of front femora red. 



25. erythrogaster var., 2 lines. 



D. Antenna; white-ringed (females). 



a. Metathoracic areae complete and distinct. 



=i= x\bdomen and legs led ; petiole and coxae black; hind and middle 

 tibiae spined outside. - - 35. ragabtindus, 2^ — S^ lines. 



2 G 



