569 



and widened at both ends but not extending caudad to the paraptera ; 

 dorsal half of the mesepimera black, the black stripe covering that 

 portion suddenly widened by a ventral projection just caudad of the 

 mesinfraepisternum; mesinfraepisterna black except the caudo-ven- 

 tral angles; remainder of the pleura blue, the interpleural fold and 

 the metapleural suture, however, lined with black ; postcoxal areas 

 mostly pale; legs blue and black; coxae largely blue, the cephalic sur- 

 faces sometimes spotted with black ; trochanters blue, black above ; 

 femora with broad dorsal stripes, blue beneath ; tibiae, tarsi, and claws 

 brown and without stripes ; wings with eight or nine postnodal cross- 

 veins in the front wing and seven in the hind wing ; stigma subelliptical, 

 black or blue in the front wing, pale in the hind wing; M 2 arising" 

 between the third and fourth postnodal cross-veins in both wings. 



Abdomen black, blue, and buff ; first tergum blue with the cephalic 

 half black; second, blue with a broad black lateral stripe on each side 

 and a narrow apical ring, the stripes extending from the base of the 

 segment to the caudal third and the two uniting on the meson at the 

 caudal ends ; terga 3-6 black, with narrow, blue, interrupted basal 

 ring and lateral marginal stripes ; seventh tergum black with pale 

 lateral stripes and a blue apical spot on the dorsum ; eighth and ninth 

 terga blue with broad, black, lateral stripes; tenth tergum black, oc- 

 casionally with indefinite blue dorsal spots ; anal appendages dark, the 

 superiors broad, laterally compressed and the ventro-mesal angles hook- 

 like; inferiors slightly longer than the superiors, subcorneal, the tips 

 black; sterna 1-10 black. 



Female. — Color similar to that of the male. 



Head similar to that of the male except that the pale area of the 

 front is not divided by the mesal black line. 



Thorax: the blue of the male is replaced by buff; pale spots of 

 ihe pronotum large and occupying nearly the whole of it; pale stripe 

 of the mesosupraepisterna extending caudad to the paraptera; legs 

 similar to those of the male, but usually paler in color; stigma of both 

 wings brown. 



Abdomen : first tergum similar to that of the male ; second, blue, 

 with a dorsal black spot near the caudal margin and the lateral mar- 

 gins pale; terga 3-6 black with pale lateral margins; terga 7-10 pale 

 blue with black lateral margins; anal appendages of the usual type; 

 ovipositor with broad lateral styles. 



Measurements 



Length, $ 32 mm. 



Length, $ 31 mm. 



