537 



Thorax blue and black ; pronotum black, cephalic lobe largely blue, 

 the median lobes with large spots adjacent to the proepimera, and the 

 caudal lobe with small spots on the lateral angles and one on the meson ; 

 proepimera distinct blue and with a dorsal, crescentic, black spot; 

 mesostigmal plates largely blue, the mesal angles black ; mesosupra- 

 episterna black, with blue longitudinal stripes from the cephalic mar- 

 gins to the wing bases, the stripe slightly widened cephalad, narrowed 

 at the middle, and widened again caudad ; mesopleural suture covered 

 by a black stripe which occupies a portion of the supraepisterna and 

 the epimera, being widest about the middle, narrowed near the wing 

 bases, extending cephalad across the infraepisterna and covering about 

 one half of those sclerites; remainder of the pleura blue, with the ex- 

 ception of spots on the interpleural fold and metapleural suture ad- 

 jacent to the wing bases ; legs bufif or pale blue and black ; coxae blue 

 with a black basal spot on the cephalic surfaces; dorsum of the 

 trochanters dark, remainder pale; femora with slight dorsal carina, 

 the dorsal longitudinal stripes usually covering the carinae, but the 

 stripes sometimes divided by a pale line on the carina, and emarginate 

 at the proximal end ; tibiae mostly pale with faint cephalo-dorsal 

 stripes or row of dashes, the ventral surfaces with black spots at the 

 base and apex; tarsi pale, the segments darker at the distal end; wings 

 with twelve postnodal cross-veins in the front wing and ten in the 

 hind wing ; stigina pale, surmounting less than a single cell ; M^ arising 

 near the fifth postnodal cross-vein in the front wing and between three 

 and four in the hind wing. 



Abdomen blue and black with a touch of bronze; first and second 

 terga blue, with black, dorsal, longitudinal stripes, the first with a very 

 narrow subapicah ring of black which does not reach the lateral 

 margins ; longitudinal stripe of the second tergum expanded subapically 

 and the tergum with a broader apical ring extending from the meson 

 half-way to the lateral margins; terga 3-7 with dorsal longitudinal 

 stripes which are contracted to the meson near the cephalic margin, 

 but widen subapically and unite with the black apical rings; terga 

 eight and nine entirely blue; dorsum of the tenth tergum entirely 

 black, the venter pale blue or buff; anal appendages (Fig. 190) short, 

 black, the superiors bilobed, the dorsal arm knob-like, the ventral 

 lobe more slender; inferiors slender, directed obliquely dorsad and 

 frequently in contact with the ventral arm of the superiors; first 

 sternum pale, 3-9 black. 



