BY R. J. TILLYARD. 763 



spot at the base, in front, and another on the basal joint; clypeus, 

 lahrum and labium pale greyish-brown, this colour extending on 

 to the eyes on either side; tnouth edged with black. Thorax : 

 Prolhorax dull blackish with three greyish-blue spots, and a pale 

 collar behind. Meso- and metathorax dull bronzy-black, a fine 

 line along the dorsal ridge; a pair of humeral bands, pale straw- 

 coloured in the young male, greyish-blue in the mature insect; 

 these are followed on each side by a band of the groundcolour, 

 the rest of the sides being greyish-blue, shading to greyish-brown 

 underneath. Notwn of immature male dull orange; in the 

 mature insect the scuta and scutella are pale blue. Legs black 

 above, pale brownish beneath, coxse pale brownish. Abdomen 

 slender; 1-2 and 7-10 very slightly thickened. Colour: 1, pale 

 blue, with an irregular black dorsal patch: 2, dark metallic green, 

 enclosing a long irregular dorsal blue spot, shaped somewhat like 

 a bishop's mitre, and enlarged at the anal end of the segment: 

 3-7, dark metallic green, a broad transverse blue band at the 

 base of each, and a narrow dorsal blue line extending to the anal 

 sutures: in 3-5 this line ends in a narrow spear- head mark: sides 

 of 2-7 pale greyish-blue, sutures black: 8, dark metallic greenish- 

 black, a pale blue dorsal line, anal suture black: 9, pale blue, a 

 narrow transverse basal black line: 10, pale blue. Append- 

 ages: Superior 1'2 mm., forcipate, black, slightly downy; the 

 inner margin slightly hollowed out towards the tips, and carry- 

 ing a large spine just beyond the middle; outer margin with 

 several minute spines or teeth. Inferior 0*5 mm., close together, 

 subconical, pale brownish. 



9. Total length 38 mm., abdomen 28-5 mm. Wings : fore 

 23 mm., hind 22 mm. 



Pterostigrna slightly longer than in male, markings of thorax 

 pale straw-coloured. Abdomen cylindrical, thicker than in male, 

 8-10 slightly swollen. Colour dull metallic greenish-black, 

 marked as follows : 1-2 as in male, but duller: 3-7 with the basal 

 bands narrower than in the male, the dorsal line straight and 

 regular, and bordered by two small slanting black spots about 

 1 mm. from the anal, end of each segment; colour of markings 



