BY H. J. TILLYARD. 339 



Thorax: Prothorax small, dark brown, a yellow collar in front^ 

 a triangular yellow spot behind. Meso- and metathorax deep rich 

 chocolate-brown, a yellow line along dorsal ridge; on either side 

 of it a broad straight steely metallic band; a small bright yellow 

 spot at each wing-base. Sides of thorax witli a broad yellow 

 band, bordered above by a narrower steely metallic band; low 

 down, two yellow spots of fair size; notiim brown with jellow 

 scutella. Abdomen subcylindrical, pinched at 3, broadening 

 to 8; 9-10 narrower. Colour rich black, marked with i»ale bright 

 yellow as follows — 1, a dorsal spot and two small lateral spots; 

 '2, auricles yellow, a slanting spot on each side of dorsum; 3, 

 basal half yellow with a somewhat diamond-shaped black dorsal 

 iiiMik, rest black. Segments 4-7 with a pair of small basal spots, 

 •A pair of larger central spots, smallest on 6, larger and of irregular 

 shape on 7; 8 three-fourths covered by a pair of large bright 

 yellow spots, almost meeting along dorsum; 9 with two small 

 basal spots; 10 with a conspicuous pale yellow spine, bent over 

 anally, sharply pointed. Appendages: Superior 3-2 mm., 

 slightly wavy, converging at tips, which are blunt and rounded, 

 almost black; inferior two-thirds as long, truncate, bent upwards. 

 (Plate vii., tigs.la,6). 



9. A slightly larger and duller insect; wings often tinged with 

 pale brown or yellow, pterostigma 3 mm., pale brownish. Head 

 and fhorax&s in male; abdomen stouter, cylindrical; 2 with large 

 oval spots; 3 as in male; 4-7 with larger basal spots and with 

 central oval spots decreasing in size, smallest owl; 8, rather short 

 .above, with two small basal spots; 9-10 without spot. Ovipositor 

 2 mm., reaching to below 10, conspicuous; ajtpendages l'2mm., 

 straight, somewhat flat and oval when viewed sideways, blacki.sh. 

 (Plate vii., fig. 19.) 



Types: Coll. Germar, Coll. Selys, $^. 



Hah. — New South Wales, Victoria, and South Australia. 



Common on bogs and marshes, and sometimes on small running 

 ^streams, in mountainous districts. Females very rarely seen, in 

 -comparison with males. 



