230 NEW FORMS OF AUSTRALIAN ODONATA, 



slightly depressed, and carry, on the middle of the lower outer 

 edge, a small obtuse tooth or spine. Inferior 1 mm., narrow 

 subtriangular, hollow above; vertex blunt and distinctly bifid, 

 showing two small tubercles (Plate xv., figs.1-2). 



£. Unknown. 



Bab. — Kuranda, N. Queensland. Three males, taken by Mr. 

 F. P. Dodd, on January 3rd, 1913, are now in my collection. 



T y p e : <J, Coll. Tillyard. 



This species is very close to Ps. circularis* Tillyard, the type 

 of the genus, which also comes from Kuranda. The label 

 " Kuranda, F. P. Dodd," covers, however, a large tract of 

 country, so that the two species do not necessarily occur together 

 in the same locality, but are, probably, geminate species separated 

 by a watershed, or inhabiting two different types of creek. The 

 chief differences are : — Ps. circularis is smaller than Ps. elliptica; 

 its head narrower, and with scarcely a trace of violet; its thorax 

 and abdomen shorter; the wings are also shorter, and less 

 saffroned at bases. The superior appendages are very distinct; 

 those of Ps. circularis being very much bent, so as to form a 

 complete circle, the tips much depressed and meeting the tip of 

 the inferior appendage, which is of the same length, and is 

 pointed and scarcely bifid at tip. 



2. Metathemis nigra xanthosticta, n.subsp. 



Very distinct from the type-form, M. nigral Til lyard( Kuranda, 

 N. Queensland). The chief points of distinction are: — Size 

 somewhat larger; abdomen, <J 41, 9 43-5 mm.; hindwing, $ 34, 

 9 38-5 mm. Wings with slightly thicker and longer pterostigma, 

 (J 2 5, £ 3 mm. Midlateral bands of thorax twice as wide as in 

 type-form. Abdomen of male with segments 1-8 spotted with 

 yellow as follows : 1, a dorsal triangle; 2, a transverse basal line; 

 3, a pair of basal spots, transversely elongate, a pair of conjoined 

 round dorsal central spots; 4 like 3 but basal spots smaller; 5, 

 ditto, but basal spots very small; 6-8 with a pair of nearly central 



* These Proceedings, 1908, xxxiii., p. 743. 

 flbid., 1906, xxxi., p.489. 



