535 



Described from three nymphal exuvia from France (Martin), 

 obtained from Mr. E. B. Williamson. 



Adult; Male. — Color, pale blue and black. 



Head black, blue, and buff; mouth-parts buff; median lobe sub- 

 triangular, the proximal segment of the labial palpi broad, the distal 

 segment pale ; antennae dark, the second segment much longer than 

 the first ; postclypeus black except the lateral margins and the ventral 

 margin, the anteclypeus, labrum, mandibles, and the transverse stripe 

 above the fronto-clypeal suture blue; genae, pale yellow; remainder 

 of the front and vertex black; postocular spots large, blue, the margins 

 of the spots irregular and the spots narrowly separated from the 

 narrow stripe caudad of the ocellar area ; occiput, except a stripe 

 caudad of the postocular spots and the postgenae, pale blue. 



Thorax : pronotum largely black, the cephalic lobe with the cephalic 

 half blue, median lobes with large oval blue spots; proepimera and 

 episterna blue with black dorsal borders ; mesostigmal plates narrow 

 and more than half pale ; dorsal carina with the black stripe which 

 covers it also covering one-half of each supraepisternum ; black stripe 

 of the mesopleural suture narrowed considerably caudad and covering 

 about one-third of the mesinfraepisterna ; remainder of the mesopleura, 

 except a small spot on the mesopleural suture near the wing bases, 

 pale blue ; postcoxal areas yellowish blue ; legs with blue coxae and 

 trochanters, the trochanters dark on the dorsum ; femora with a single 

 black stripe on each dorsum, the stripe broken by a small spot at the 

 base; cephalic half of the dorsum of the tibiae with black longitudinal 

 stripes; tarsi pale yellow, darker at the distal ends; wings with twelve 

 postnodal cross-veins in the front wing and ten in the hind ; stigma 

 surmounting less than a single cell, pale. 



Abdomen blue and black ; first tergum with small basal and 

 smaller lateral black spots; second tergum blue with a subelliptical 

 apical spot and an apical ring; terga three, four, and five with apical 

 spots connected with the apical rings; apical half of the sixth and 

 about four-fifths of the dorsum of the seventh with broad black stripes 

 expanded caudad but not reaching the margins of the terga ; terga 

 eight and nine pale; dorsum of ten black, the caudal margin distinctly 

 incised on the meson, the lateral surfaces of the segment pale yellow; 

 first sternum pale, 3-8, inclusive, black; anal appendages (Figs. 201, 

 208) black and brown, the superiors short, bent ventrad and some- 

 what acute at the apex; inferiors much longer than the >uperiors and 

 black at the tips. 



Female. — Color in general similar to that of the male, the blue, 

 however, replaced by yellow. 



