328 THE ENTOMOLOGIST. 



I Base of autenn* and back of middle abdominal segments red. 



12. cereus, '2 lines. 

 II Segments "-^nd to 4tb or 5th red ; base of antenna? black. 



65. procerus, '^^ — 5 lines. 

 G. Metathoracic areas not complete or distinct (males). 

 '■'■■ MetatboiHX very rough, so that the arese are not distinct. 

 t 1st segment broad ; apex of hind femora black; face and front 

 coxa; white-marked. - - 39. quadrispiiius, 3 — 4 lines. 



ft ist segment narrow; bind femora, face and front coxae, black. 



40. senilis, -^—H lines. 

 ■''■•' Metathorax not very rough. 



a. Metathorax with two cross lines; the supero-medial area not 

 closed at the sides. 

 Segments 2nd to 4th red,* or red with dark bands ;=:==:= femora and 

 tibicie red, apex of hinder black. 

 =:= ind abdominal segment smooth. - 14. nitidus, Sf — 3^ lines. 

 ■■•■'' 2nd segment distinctly jiunctate. - - Marshalli, o lines. 



I). Supero-medial area not closed above, in form 4- or 6-angled ; if 

 closed above then somewhat quadrate, the upper lateral areae 

 often wanting. 



* Legs marked with white. 



f Front coxae and trochanters white. 



I Hinder coxae black. - - - 08. galactiaus, 2^ — 3 lines. 

 II Hinder coxae red. - - - . 28. improhus, 2 — 3 lines. 

 ■i-t Coxae and trochanters black. 

 § Internal orbits, a line below the wings and ring of tarsi, white. 



69. suhguttatus, nearly 4 lines. 

 §§ Base of tibiae and orbits white. - 56. irtsiso/ms, almost 4 lines. 

 =i'-* Legs not marked with white ; middle of abdomen red. 

 X Clypeus and labrum whitish. - - 55. labralis, 3 — 4 lines. 

 X X Face not white-marked. 



Metathoracic spiracles almost linear. 



50. enjthrostictus, 4 — 4f lines. 

 00 Metathoracic spiracles round, or nearly so ; supero-medial area 



subquadrate. 

 -!- Greater part of hind femora black. - 52. assimilis, 3 — bi lines. 

 -i--^-- Hind femora red, apex black. - - - 57. sericans, 3f lines. 

 (\ Supero-medial area not closed below, which forms a long area from 



base to apex of the' metathorax. 

 =1: Slanting part of the metathorax perpendicular. 70. suhtilis,2h Vines. 

 ■\'-'.- Slanting part of the metathorax forms a continuation of the upper 

 part by a gradual slope. 

 Legs vary much in colour. - 71. teneriventris, 2| — 2f lines. 



Section 5. — Thorax more or less red. 



Abdomen red, apex black, anus white-marked, antennae white- 

 ringed (females). 



* Hind femora black. 



t Head almost entirely red. - 30. sanguinator, 2-| — 3 lines. 



If Head almost entirely black. 



\ Metathoracic areae complete and distinct. 29. fidgitator, 2J lines. 



II Metathoracic areae incomplete. - - 58. tyrannus, 3 lines. 



=:==:: Greater part of hind femora red. - 31. Hopei, 2^ — 2f lines. 



