448 ON THE GENUS NANNODYTHEMIS, 



and transverse carina shining black; 4-5 nearly black, the orange 

 markings more or less obliterated; 6 with the large spots red; 

 7-10 brilliant red, each segment sometimes with a more or less 

 regular transverse anal black band, and sometimes unmarked 

 except for a black point at the tip of the segment, low down on 

 each side. Appendages: superior 0*8 mm., narrow, wavy, 

 sublanceolate, carrying a few fine hairs; just touching near tips;, 

 pointed, red. Inferior 0*6 mm., subtriangular, tip slightly 

 upcurved, orange-red. 



Q. Total length 19-21 mm; abdomen 125-13-5 mm.; forewing 

 15-16 mm.; hindwing 14-5-15-5 mm. Wings as in <J but with a 

 considerable amount of saffroning, extending in forewings nearly to 

 arculus, and in hind wings covering a larger area nearly to arculus, 

 lighter along costa, and another light patch along nodus. Head: 

 eyes paler than in male, bright ochreous underneath; front, clypeus 

 and labrum yellower than in male. Thorax as in the less 

 mature male. Abdomen wider and more cylindrical than in 

 male; colour black, marked with orange as follows — 1, a trans- 

 verse anal band; 2, sides orange crossed by a thick black line on 

 the transverse carina; 3, a large orange patch on each side; 4-6, 

 an elongated oval spot or patch on each side; 7, a very large 

 oval spot on each side; 8, a smaller subtriangular spot on each 

 side; 9, a pair of small basal lateral spots; 10, black, suture 

 orange. Underside black with large semielliptical yellowish 

 spots on either side of each segment, 2-6 downy beneath. 

 Appendages separate, 04 mm., subconical, pointed, hairy, 

 orange with black tips. 



Hab. — Queensland: Moreton Bay — New South Wales: Byron 

 Bay, National Park, Wentworth Falls, and probably on all coastal 

 swamps and mountain bogs. It appears at the end of September, 

 when it may be found sitting in characteristic attitude on the 

 reed- and grass-stems, with wings very much depressed and abdo- 

 men somewhat curved inwards. It continues on the wing until 

 February. Its flight is irregular, close to the surface of the water, 

 or in and out among the reed-stems. The females are less active 

 and are found in the thicker parts of the reed-beds. 



