b. Smaller. Length under 11 nim. 



'. Mandibles with a tooth on inner margin 



at base y". yreeni, p. 11. 



b'. Mandibles not toothed. 



a 2 . Posterior border of hypopygiurn 



broadly emarginate. 

 3 . Head transverse ; distance between 

 articulation with thorax and front 

 distinctly less than distance be- 

 tween eyes JE. shuckardi, p. 12. 



b 3 . Head rounder, distance between ar- 

 ticulation with thorax and front 

 aboutequal to distance between eyes. y". clavatus, p. 12. 

 b~. Posterior border of hypopygium entire, 



not emarginate. 



a 3 . Posterior border of pygidium me- 

 dially emarginate JE. Zonyi, p. 13. 



b\ Posterior border of pygidium entire, 



not emarginate. 



4 . Mandibles strongly convex ex- 

 teriorly, sickle-shaped, without 

 any projection on inner margin 



a 3 . Length 9-10-5 min JE.fece, p. 14. 



b 5 . Length 5-6 mm JE. icrouyhtoni, p. 16. 



6 4 . Mandibles flat and broad at base, 

 diminishing rapidly to an acute 

 point at apex, broa'dened at base 

 by a rounded projection on the 

 inner margin. 



a 5 . Tibiae strongly clavate, apical 

 two-thirds greatly enlarged. 

 Carina beneath node of pedicel 

 not prolonged posteriorly into 



a tooth JE. clavitibia, p. 14. 



b 6 . Tibiaa not so strongly clavate, 

 apical two-thirds only slightly 

 enlarged. Carina " beneath 

 node of pedicel prolonged 

 posteriorly into a tooth JE. latiscapus, p. 15. 



$ $. 



A. Head with an oval yellowish or reddish-white 

 spot on each side. 



a. The lateral spots on head placed high up, 



their posterior margins prominent, 'form- 

 ing small tubercles A. martini) p. 17. 



b. The lateral spots on head placed lower 



down, their posterior margins not pro- 

 minent, not forming tubercles. 

 a'. Posterior margin of head transverse, as 



wide as in front &.feryu8oni, p. 18. 



b' . Posterior margin of head not transverse, 



narrower than in front. 

 o a . Length under 4 mm. ; 1st joint of 



pedicel finely reticulate but shining. . JE. laviceps, p. 18. 

 b*. Length over 4 mm.; 1st joint of 

 pedicel coarsely sculptured,' rugose, 

 not shining A. binyhami, p. 18. 



