736 THE DRAGONFLIES OF SOUTH-WESTERN AUSTRALIA, 



with a white line edging the labrum; labrum black, yence pale 

 dull yellowish, labium black, shading to pale brown below. 

 Thorax: Prothorax black. Meso- and metathorax dark metallic 

 green (black in the aged insect), lower parts of sides and under- 

 side brownish, with two slanting black spots close to coxse. Legs 

 slender, black, coxse pale. Abdomen: slender, cylindrical, 1-2 

 and 7-10 slightly enlarged. Colour very dark metallic-green 

 throughout (black in the aged insect); a fine white transverse 

 line in the anal suture of 8, a broad one in the anal suture of 9, 

 a tiny white V at the end of 10. On each side a tiny white 

 mark in the anal suture of 2-5. Appendages: Superior 

 forcipate, thin, 1 mm., black; a small spine on the inner margin 

 near the tip, and 3 or 4 minute spines and hairs on the outer 

 margin. Inferior very short, black, wide apart, upcurved, tips 

 blunt. 



9. Total length 29-31 mm., abdomen 24-25 mm. It differs 

 from the male as follows : — Eyes pale milky-blue behind, black in 

 front, epicranium milky-white in front along the orbits. Ahdomeyi 

 cylindrical, stouter and shorter than in the male, seen sideways 

 8-10 much enlarged; 8 has a pale cream-coloured transverse band 

 next the suture, nearly half a millimetre broad in the middle. 

 Ovipositor black and projecting beyond appendages. Appendages 

 very short, black, cylindrical, slightly separated. 



Race pusillus. — An extremely small race found in the southern 

 districts, and differing considerably from the type. Were it not 

 for the fact that intermediate forms are commonly found, con- 

 necting this with the type, one would certainly see in them two 

 distinct species. The differences are as follows : — 



(J. Total length 27 mm., abdomen 21mm.; forewing 15 mm., 

 hindwing nearly 16 mm. Pterostigma rather narrow, 0*7 mm., 

 black; forewings shorter than hindtvings. Legs rich brown or 

 reddish-brown. Anteclypeus pale brownish-yellow. Thorax and 

 first two segments of abdomen slightly powdered with greyish 

 bloom, groundcolour deep black. Appendages with the spine on 

 inner margin very conspicuous. 



