^6 THE ENTOMOLOGIST. 



If Gastrocseli very distinct ; antennae white-ringed ; tarsi and tibiae 

 straw-yellow, apex of hinder black. 2. trifasclatus, 6 — 1^ lines, 



b. 0th and 7th segments entirely, or margins, fulvous ; tibiae yellowish, 

 apex of hind one black. 



- Scatellum yellow. - - - - 1. 2)alUatorms, 6 — 8 lines (a). 



•!'=:= Seutellum white. cerinthius, 5 — 5i lines. 



B. Abdomen red ; apex of 1st and 2nd segments widely yellow ; 1st, 



Brd, and 4th generally black at the base (females). 

 Tarsi and tibiae orange, apex of hinder brown. 



14. crispatorius, 6 — 8 lines (t). 



C. Basal or intermediate segments with pale spots (females). 



a. 2nd and 3rd segments with pale lateral spots ; apical segments pale 



marked. 

 =;= P'emora black ; the spots on 2nd and 3rd segments large and 

 yellow ; tarsi and tibiae yellow, apex of hinder black. 



4. monitorius, 6i — 7 lines. 



>;:■-;< Femora fulvous. 



f Head moderately narrowed behind the eyes (spots on one or both 



segments sometimes wanting). - 12. notntoriiis, 7 — 9 lines (a). 



ff Head nearly straight behind the eyes. - 11. atratorius, 6|- lines. 



b. Basal segment or segments with the apical margins white ; or with 



white lateral spots — 1st to 3rd, or 1st and 2nd, or 1st, segments 

 marked. 

 Legs black ; tibia? broadly white-ringed. 

 Gastrocseli small ; metathoracic areae, three. 

 I Frontal orbits broadly reddish straw-coloured. 



9. margineguttatus, 6 lines (a). 

 + 1 Frontal orbits broadly marked with white. 



8. oratorius, 6— r-7-|- lines (a). 



- c. The last four or five apical segments with greenish white lateral 



bands (also male). - - 17. glaucatorius, 5^ — 7|- lines. 



A. 2nd and 3rd or 4th segments yellow, more or less marked with 



black ; remaining segments with yellow margins (males). 



a. Gastrocaeli subobsolete. 



=:= 2nd segment at the base, 3rd base and apex, yellow. 



6. infractorius, 6 — 7 lines. 

 =:•=:= 2nd and 3rd segments with large lateral spots. 



4. monitorius, 6|- — 7 lines. 



b. Gastrocaeli distinct ; tarsi and tibiae yellowish, apex of hinder brown. 



20. occisorius, 5-|- — 8 lines [h, s, a). 



B. 2nd to 4th segments yellow, or marked with black; apex of abdomen 



pale (males). 



a. Metathorax armed with two acute spines. 5. armatorius, 6 — 8 lines. 



b. Metathorax not so armed. 

 =;= Seutellum yellow. 



■t- Gastrocteli slightly impressed. - 1. paUiatorius, 6 — 8 lines (h, a). 

 If Gastrocaeli very distinct. - - - 2. trifasciatus, 6 — 7^ lines. 

 -•:==:=, Seutellum white. - - - - cerinthius, 5 — 5;^ lines. 



C. 1st and 2nd, or 3rd, basal segments with white lateral spots or lines 



(sometimes wanting) ; Gth and 7 th, or 7th alone, white marked 

 (males). 

 Gastrocaeli small; metathoracic areae, 3. 



