28 E. B. Williamson and J. H. Williamson 



Mesostigmal lamina above low, gradually rising to near the lower end 

 where it is rounded off so the lower third is symmetrically convex. 



Coxae pale, the third pair with a small black area on the anterior face. 

 Femora pale yellowish, slightly tinged brownish at the base, and dis- 

 tinctly black at the apex with two intermediate brownish rings or areas, 

 about equally spaced, and each about the same extent as each of the three 

 pale areas thus formed, the basal of these two darker areas the paler and 

 less distinct; ventral surface black in the median line except at the base 

 of the first femur and the apices of all. Tibiae pale like the femora, the 

 first tibia with a narrow black line beneath, widening and more distinct 

 at the comb, this line a mere trace on the second and third tibiae ; a basal 

 streak of brown on the dorso-anterior surface of all the tibiae, most distinct 

 on the first, scarcely evident on the third. 



Venation like that of solutus; stigma black. 



Abdomen seen from above: 1 and 2 similar to those of solutus, but the 

 median longitudinal pale bar on 2 shorter, only about two-thirds the length 

 of the segment ; 3-7 each with an obscure pale basal ring, darkest and least 

 evident on 3, followed by brown which darkens posteriorly, becoming black 

 on 4r-6; 3-6 with this dark on each segment fading posteriorly into pale 

 which in turn darkens into an apical black area about twice as extensive 

 as the pale area which precedes it; 3-8 each with or without a median 

 longitudinal thread line of pale which disappears before the apex of 8; 

 7 uniformly dark brown after the obscure pale basal ring, tending toward 

 black along the middorsum ; 8-10 dark brown, 8 the palest of the three, 

 and 10 nearly or quite black. Seen from the side : 1 and 2 are similar to 

 those of solutus ; 3-6 each pale at base and subapically along the ventral 

 margin, these pale areas extending toward each other along the extreme 

 ventral margin, and obscurely joined on 3, but progressively more widely 

 separated from 4 to 6 by the lateral extension of the large median dark 

 area ; 7 pale at base, then brown, the extreme apex usually darker ; 8 with 

 the entire side fading out to light bluish along the extreme ventral margin ; 

 9-10 black, 9 with the merest line of pale on the ventral border. Sternum 

 of 1 pale ; of 3 pale with a longitudinal streak, narrow and darkest at the 

 base, then widening and fading out before the middle of the segment, 

 darkening again to black in the apical black of the tergum ; 4—6 each with 

 the sternum pale at base, then darkening through brown to black which 

 fades out to pale at or before the subapical pale area of the tergum, the 

 apex as in segment 3 ; in life the pale areas on the sterna of 3-6 doubtless 

 show more or less blue ; 7 black, extreme base and apex apparently blue ; 

 8-10 heavily pigmented, bright blue (or possibly yellow) in life. Appen- 

 dages white to brown, the external edge brown to black. 



Length of wing or lobe on the expanded postero-ventral margin of the 

 tergum of 2 about .8 and the distance from the apex of this lobe to thef 

 antero-ventral angle of the tergum about 1.7. 



Female. — Labium as in the male ; labrum yellowish brown, the apical half 

 and the lateral margins black ; clypeus in front greenish, a large brown 

 area in the middle of each side, above dark brown to black. 



Prothorax as in the male. 



