520 



gg. Black color of the dorsum of abdominal terga 4-7 never 

 reaching the cephalic margins. 



h. Cephalo-mesal angles of the mesostigmal plates 



rounded and hollowed out (Fig. 213) . . .cyatliigerum. 



hh. Cephalo-mesal angles of the mesostigmal plates not 



rounded or hollowed out (Fig. 223) calverti. 



ee. Mo arising between the third and fourth postnodal cross- 

 veins in the hind wings. 



f. Mesostigmal plates narrowed at middle (Fig. 227) .ebrium. 



ff. Mesostigmal plates considerablv widened at the middle 



(Fig. 221) liageni. 



dd. Dorsum of the tenth tergum pale ; mesopleural black stripe 

 divided by a brown stripe immediately above the suture ; caudal 

 lobe of the pronotum with a median mound-like elevation (Figs. 

 219,220). 



e. Caudal margin of the mesostigmal plates at right angles to 

 the dorso-meson exsulans. 



ee. Caudal margin of the mesostigmal plates not at right angles 



to the dorso-meson ( antennatum. 



\ divagans. 



Males 



a. Dorsum of the second abdominal tergum with an apical spot occupy- 

 ing at most half of the segment ; remainder of the tergum blue. 



b. Lateral surface of the second abdominal tergum with a short lon- 

 gitudinal brown or black stripe geminatum. 



bb. Lateral surface of the second abdominal tergum without a short 

 longitudinal brown or black stripe, 

 c. Caudal half of the seventh abdominal tergum blue ; postocular 



spots connected with the blue of the occiput aspersum. 



cc. Caudal half of the seventh abdominal tergum black ; postocular 

 spots not connected with the blue of the occiput. 



d. Dorsum of the fourth and fifth abdominal terga more than 

 half black carunculatum. 



dd. Dorsum of the fourth and fifth abdominal terga less than half 

 black. 



e. Superior anal appendages bifurcate ebrium. 



ee. Superior anal appendages not bifurcate. 



f . Inferior anal appendages longer than the superiors. 

 g. M 2 arising between the third and fourth postnodal cross- 

 veins in the hind wings liageni. 



gg. M 2 arising between the fourth and fifth postnodal cross- 

 veins in the hind wings. 



