519 



ADULTS 



Feviales 



a. Eighth abdominal tergum with a large bhie or pale spot on each side 

 side of the meson. 



b. Dorsum of the seventh tergum blaelv (Fig. 96) geminatum. 



bb. Dorsum of the seventh tergum blue, never with more than a line 

 of black on the meson (Fig. 95) aspersum. 



aa. Eighth abdominal tergum without a large blue or pale spot on each 

 side of the meson. 



b. Longitudinal dark stripe on the dorsum of the second abdominal 

 tergum dumb-bell shaped ; caudal half of the eighth tergum lilack or 

 dark Iravuitum. 



bb. Longitudinal stripe on the second abdominal tergum not duml)-l)ell 

 shaped; apical half of the eighth black or dark, 

 c. Proximal two-thirds of the second antennal segment pale. 



d. Dark stripe of the mesopleural suture reduced in width to a 

 mere line and much less distinct than the dorsal stripe covering 

 the carina; color of the thorax aliove faint blue (teneral) or 

 lemon-yellow (mature) and black pollutum. 



dd. Dark stripe of the mesopleural suture not reduced in width 

 to a mere line and as distinct as the dorsal stripe covering the 

 carina; color of the thorax above blue (teneral) or orange 

 (mature) and black signatum. 



cc. Proximal two-thirds of the second antennal segment brown or 



black. 



d. Dorsum of the tenth tergum dark ; mesopleural black stripe 

 of the suture not divided by a brown stripe immediately above 

 the suture ; caudal lobe of the pronotum without a median 

 mound-like elevation. 



e. Mo arising beyond the fourth postnodal cross-vein in the 

 hind wing. 



f. Mesostigmal plates with a diagonal ridge from the caudo- 



mesal to the cephalo-lateral angles carunculatnm. 



ff. Mesostigmal plates without a diagonal ridge from caudo- 

 mesal to cephalo-lateral angles. 



g. Black color of dorsum of abdominal terga 4-7 always 

 reaching the cephalic margins (Fig. 92). 

 h. Mesal half of the caudal margins of the mesostigmal 



plates convex (Fig. 212) civile. 



hh. Mesal half of the caudal margins of the mesostigmal 

 plates concave (Fig. 22G) douhledayi. 



