BY R. J. TILLYARD. 727 



paii' of narrow slanting pointed marks : 8-10 black : 10 with a 

 pair of small black tubercles, sharply pointed, above the bases of 

 the superior appendages; 10 also much tubercled and swollen 

 below inferior appendage. Appendages: Superior 3 mm., 

 depressed, forcipate, black; wide apart at bases. Inferior 2 - 2mm., 

 truncate, broad at base, very thick, black, concave and marginate 

 above. (See Plate lxviii., figs.l«-16). 



Hob. — Kuranda, N.Q.; January, 1905; rare; three males only. 



It flies very swiftly up and down densely wooded mountain 

 creeks, often hovering, perfectly still, over some favourite pool, 

 or resting on a twig or jutting piece of rock in places where the 

 rocky banks of the jungle creeks are overhanging or vertical. It 

 is very difficult to capture. 



As the appendages differ from the typical Planaeschna form, 



notably in the shortness of the superior and the comparative 



length of the inferior, this insect should probably form the type of 



a new genus. 



5. Caliaeschna conspersa, n. sp. 



(J. Total length 58-61 mm.; abdomen 43-45 mm.; wings, fore 

 36-39 mm., hind 35-38 mm. 



Wings: Neuration black; triangles three-celled in fore and 

 two-celled in hindwings, preceded by 4-5 nervules in sub-median 

 space. Anal triangle of hindwings fairly broad, right-angled, 

 3-celled, bases of wings touched with deep brown. Pterostiyma 

 2 mm., covering about two cellules, dark brown (fulvous in imma- 

 ture specimens). Membranule, fore small; hind 2 mm., rather 

 narrow, pure white. Nodal Indicator 15-16 10-11 sixth ante- 

 nodal thickened. Head: Vertex a very 10 9-10 small dark 

 brown tubercle; antennce short, black; eyes brown, meeting along 

 their whole length; occipital triangle very small, cream-coloured. 

 Front very high and large, with a well-marked semicircular ridge 

 above, running from one side to the other, and carrying a short 

 row of hairs on top; that part of the front in advance of the ridge 

 is strongly granulate, flattened at the sides, but raised in the 

 middle into a low triangular pyramid somewhat rounded off at 

 the top; colour dark brown, slightly paler in front of ridge; a 



