730 THE DRAGONFLIES OF SOUTH-WESTERN AUSTRALIA, 



various colours, as follows : firstly, the brown colour from above 

 borders the sides in a band from forewing to mesocoxa; then 

 comes an irregular greyish lateral band, enlarged near the wings, 

 then suddenly constricted, and again enlarging into a rounded 

 knob towards coxa; round this knob the rich brown from above 

 curls, bending under it and more than half enclosing it. After 

 this follows an irregular area of a beautiful mauve colour bordered 

 with brown in the sutures; a greenish-yellow spot touches it 

 near the hind wing- join, and a large spot of the same colour 

 touches the metacoxa. Below the mauve area runs an irregular 

 sublateral grey band similar to the former one, and, like it, 

 nearly surrounded by a brown line or band in the sutures. 

 Next to the abdomen is another, but smaller, area of mauve, 

 touching the brown line on each side and shading into the sub- 

 lateral band itself. Notum brown, scuta and scutella greenish- 

 yellow. Legs : coxse and trochanters dull yellowish-grey, femora 

 dirty yellowish, much marked w4th brown lines and shaded with 

 black, elbows yellowish, rest black. Abdomen fairly 

 cylindrical, 1-2 swollen, 7-10 very slightly enlarged. Colour 

 rich dark brown, shading to black, and marked with pale 

 greenish-yellow as follows : 1, a small dorsal spot, a pair of large 

 lateral spots; 2, a dorsal longitudinal band, rather narrow and 

 irregular; spurs greenish-yellow above and below, ridged with a 

 brown line; behind each spur a somewdiat crescent-shaped spot; 

 genital shield very large, yellowish-grey : 3, a round basal 

 dorsal spot; bases greyish-yellow on sides; a pair of central 

 dorsal spots very close and much pointed anally : 4-6, a broad 

 transverse basal band, deeply cleft along dorsum, and a pair of 

 central dorsal spots, narrow and elongated, and only separated 

 by a fine line along the dorsum. This set of markings is such as 

 to isolate a conspicuous brown spear-head mark on each segment. 

 Low dowm on each side of 3-7 is an anal spot, largest in 7; 7 

 has the basal band and the central spots almost united, a fine 

 transverse line only just separating them ; 8, a pair of irregular 

 basal dorsal marks almost united, and very often forming a single 

 round spot, sides low down marked irregularly with yellowish, 



