BY R. J. TILLYARD. 239 



mm., basal joint swollen, whitish, second joint fairly slender, 

 slightly swollen at tip, rather long, whitish shading to brown dis- 

 tally, rest very slender, dark. Epicranium metallic green, clypeus 

 bronze, labrum dark metallic green, labium wide, dull, pale dirty 

 straw-colour. Thorax: prothorax bronze, with a pale straw- 

 coloured collar, and a thick irregular humeral band on each side, on 

 which is partly isolated a conspicuous bronze point. Meso- and 

 metathorax bronze above and on sides ; a pair of conspicuous slant- 

 ing posthumeral bands of cream or pale j^ellow, rather irregular, 

 broadest near wings, and narrowing forwards ; also a fine pale line 

 on each side,* in the lateral suture ; underside and lower part of 

 sides white touched with cream; notum dirty pale brownish, glau- 

 cous. Legs slender, rather long, coxae whitish, rest pale dirty 

 brownish; elbows black; a black line on distal half of profemora; 

 tibiae with long slender spines. Abdomen very slender, 1-2 and 

 8-10 slightly enlarged. Colour dark bronze, marked with cream 

 or pale yellow as follows: 1, a dorsal patch, and white underside; 

 2, lower part of sides, and underside enclosing brown genitalia ; 3-7, 

 a pair of basal subtriangular marks extending downwards along 

 the sides to a sharp point apically, and joining one another basally 

 underneath ; 8, with same markings very low down, not visible dor- 

 sally; 9-10 dark bronze. Segment 10 of remarkable shape, being 

 raised dorsally into two parallel ridges, from which the superior 

 appendages arise; these ridges are concave inwards, and end in a 

 conspicuous spine above ; colour black. Appendages: superior, 

 2-7 mm., white, elongate, forcipate, and also bifid at their basal 

 third; the inner forks 0-6 mm., short, straight, sharply pointed, 

 converging to meet or cross inwards, a distinct rounded lobe on 

 outer border; outer forks long, curved, often crossed at tips. In- 

 ferior reduced to two dull whitish tubercles. Apparently the 

 superior appendages here play the double part of two sets of 

 elaspers often allotted to superiors plus inferiors together ; or pos- 

 sibly the inferior forks play the part of spines. (Plate xv., figs. 

 10-11). 



£. Total length 49, abdomen 39, forewing, 30-5, hindwing 29 mm. 

 It differs from the male as follows : pterostigma slightly larger, 



