Syiiipctnini. 95 



hyaline ; nervurcs black. Ptcrostigina 2mm. long, rather 

 broad, black. Accessory membrane narrow, whitish. Legs 

 black. Abdomen short, much constricted about the 

 fourth segment, and dilated about the seventh and 

 eighth ; black except for a dark olive lateral suffusion 

 on segments 2 and 3. Anal appendages black ; upper 

 cylindrical, pointed, as long as the ninth segment ; lower 

 shorter, triangular. 



Female Imago. 



On the face the }-ellow colour is better developed than 

 in the male, especiall)^ on the frons ; the vertex also is 

 yellow. The attachment of the \\ings yellow, and pro- 

 jections between them )-ellowish. A conspicuous saffron 

 patch at the base of the hind-wings, and a touch of it 

 on the same part of the fore-wings. Ptei-ostigma longer 

 than that of the male. The coxcc tend to remain }-ellow 

 as in immature specimens. Abdomen compressed, not 

 constricted and then dilated ; the upper surface is 

 chiefl}' orange-brown, this colour gradually decreasing in 

 amount towards the posterior extremity ; there is a black 

 band across the first segment, as well as one produced 

 centrally behind into an obtuse point along the base of 

 the second segment ; generall\- a more or less distinct 

 mid-dorsal black line, especially on the basal segments, 

 except the first ; two large yellow spots at the base of 

 the second segment below. Anal appendages black, 

 cylindrical, pointed, nearl}' as long as the ninth 

 segment ; eleventh segment orange. Vulvar scale 



pointed and ver\' prominent. Other particulars, 

 especially the distinctive markings on the thorax, 

 resemble those of the male. 



