BY R. J. TILLYARD. o89 



leg 0-5-5-2 mm.: hind leg 7-5-5-2 mm. Abdomen slendei-, sub- 

 cylindrical, 1-3 slightly enlarged, 4-10 quite cylindrical. Colour 

 brilliant blue, marked with jet black as follows — 1, a transverse 

 basal band; 2, a Tiarrow transverse basal band, a fine doi-sal line 

 crossed about one-third from apex of segment by a short cross- 

 piece; 3, a fine dorsal line spreading apically into a large diamond- 

 shaped patch; 4-7, a thick convexly curved dorsal band spreading 

 so as to cover the whole of the apical fourth of the segment; 8, a 

 narrower and straighter dorsal band, spreading as in 4-7; 9, a 

 large semicircular basal patch, from which projects a sharp dorsal 

 spike; 10, black with two large oval blue spots Appendages: 

 superior 2 mm., forcipate, black, rough and spiny, narrowed about 

 the middle; tips rather broadened and rounded; seen sideways, 

 the tips are enlarged downwards. Inferior 0-5 mm., black, close 

 together, well-rounded and almost touching at tips; seen sideways, 

 they appear truncated(Plate xx., figs. 4a, h). 



9. Total length 47, abdomen 33, hindwing 33, greatest breadth 

 6 mm. 



Wings : pterostigma 3*5 mm., cream-coloured between black 

 nervures; subcostal space paler and wider than in male, with the 

 subcostal and radio-median nervures quite distinct from bases 

 onwards. Head: eyes brown bordered inwards with cream- 

 colour; vertex hairy, blackish, with four brown spots, the front 

 pair rather small and rounded, the back pair larger, elongate 

 irregular subtriangular (Plate xix., fig.ll); front brown, hairy; 

 clypeus brownish edged with black; labrum very pale brown 

 bordered with black, and with a fine short central black line; 

 labium pale dirty brownish; morith black. Thorax : prothorax 

 and upper part of thorax as in male, but with the blue colour 

 replaced by dark brown; sides pale greyish touched with fawn- 

 colour, with a narrow lateral black band; notum dark brown with 

 paler spots. Legs : coxse and undersides of femora whitish; 

 femora pale brown darkening to blackish; test dull blackish. 

 Abdomen subcylindrical, 1-3 slightly enlarged, 4-7 somewhat 

 tapering, 8-10 slightly enlarged again. Colour brown; 1, whitish 

 on sides; 2-3, a medium brown with black sutures, a fine black 



