750 ON SOME REMARKABLE AUSTRALIAN CORDULIIN^, 



yellow band, crossing the notum also, then a narrow band of 

 steel colour; rest of sides and underside yellowish. Legs black, 

 except underside of profemora yellowish-brown. A b d o m e n : 

 1-2 swollen, rest very slender, gradually widening to 10. Colour: 

 1, black; 2, basal half yellow with a narrow black dorsal portion, 

 anal half black, spurs dark brownish; 3-7, black, with a pair of 

 central oval yellow spots largest in 3, then gradually getting 

 smaller and rounder from 4 to 6, larger again in 7, each pair 

 crossed near anal ends by a black line in the transverse carina; 

 8, black with two very large yellow spots, elongate-oval and 

 pointed anally, reaching from base to two-thirds of the length of 

 the segment, and crossed at their middle by a fine black line; 

 9-10 black. Appendages : superior- long, 3 mm., hairy, black, 

 wide apart and slightly swollen at bases, then undulating and 

 swelling out into a rather rounded and somewhat clubbed tip 

 (see Plate xxi.,figs.ll, 12) Inferior short, l'2mm., subtriangular, 

 upcurved, black. 



£. Unknown. 



Hah. — Kuranda, N Q. Very rare; January, 1908. A unique 

 male taken by my friend, Mr. E. Allen, of Cairns. 



This interesting species shows great similarity in its general 

 markings to S. virg ula Selys, a fairly common southern species, 

 from which it is readily distinguished by its long and peculiarly 

 formed appendages. 



In conclusion, it may be remarked that the genus Synthemis, 

 of which fifteen species are now known, stands in great need of 

 careful revision and systematic treatment. The two species just 

 described are widely separated, and should certainly be placed in 

 different genera, if a clear point of separation could be found 

 between the members of the group. But while it seems so pro- 

 bable that new species will continue to be found as long as new 

 Australian localities can be visited by collectors, it is perhaps 

 advisable to leave this typically Australian group in its present 

 condition, and to wait until further knowledge of it is made 

 available. ■ 



