520 



gg. Black color of the (loi-siitn of abdominal terga 4-7 never 

 reaching the cci)halic margins. 



h. Cephalo-mosal angles of the mesostigmal plates 



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



hh. Cephalo-mesal angles of the mesostigmal plates not 



rounded or hollowed out (Fig. 223) calverti. 



ce. 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 i)lates considerably widened at the middle 



(Fig. 221) ' " Iwgeni. 



dd. Dorsum of the tenth tergum i)ale ; mosopleural black stripe 

 divided by a brown strijte immediately above the sutui'e ; caudal 

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

 219,220). 

 e. Caudal mai-gin of the mesostigmal plates at right angles to 



the dorso-mcson cxsulans. 



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



to the dorso-meson I 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 anpersxim. 



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 tcrga more than 



half black carunculatum. 



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

 black. 



e. Superior anal api)endages bifui'cate ebi-iiim. 



ee. Superior anal apiiendages not bifurcate. 



f. Inferior anal ai)pendages longer than the superiors, 

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

 veins in the hind wings hageni. 



gg. Mo arising between the fourth and fifth postnodal cross- 

 veins in the hind wings. 



