1 90 NEW AUSTRALIAN SPECIES OF THE FAMILY AGRIOXIDjE, 



round spot; front, near the postclypeus, golden-yellow. Eyes 

 black behind, greenish on sides, bright golden-yellow in front; 

 ocelli black, a small yellow spot between the front and each of the 

 hind ones. Antennm black, basal joint somewhat clubbed. 

 Clypeus and labrum brilliant golden-yellow. Labium and man- 

 dibles dull greyish; mouth edged with black. 



Th o r a x. — Prothorax black, spotted with olive-green. Meso- 

 and metathorax brilliant golden-yellow above, with a black collar 

 next the prothorax, a black ray along the dorsal ridge, and, on 

 either side, a black humeral ray bordering the }^ellow. Sides deep 

 blue, shading to greenish above. Underside greyish. Legs 

 greyish, upper side of femora black. 



Abdomen very slender, 1-2 and 8-10 very slightly enlarged. 

 Colour : 1-2 blue, 2 with a black anal spot; suture between 2 and 

 3 black; 3-7 black, with metallic bronze reflections, a basal trans- 

 verse greenish band next to the sutures. Sides of 3-5 blue, with 

 an anal black spot extending downwards from the dorsal region- 

 6-7 black on the sides; 8-10 deep blue, sutures black; 10 with a 

 black dorsal spot. 



Appendages. — Superior 0*4 mm., divergent, wide apart at 

 bases, straight, pointed, black. Inferior very short, bluish-grey. 

 (See Plate xvii., fig. 8a). 



Q. Unknown. 



H a b. — Atherton, N.Q. January, 1905. Very rare. 



Four males were taken flying up and down the creek at Atherton, 

 over slowly-running rocky pools. It flies close to the water in a 

 zig zag direction, often crossing from side to side or turning quite 

 round in a semicircle. Lt is fond of settling, like Pseudagrion 

 cyane, on floating leaves of water plants. Until the $ of this 

 species can be found some doubt must always exist as to whether 

 it is a true Pseudagrion or not, the genus being defined by the 

 absence of the small spine on the underside of segment 8 of the 

 §. The £ appears to be closely related to that of P rubriceps 

 Selys, a Javan insect. The remarkably vivid colouring of this 

 insect is unparalleled amongst Australian Agrionidre As it skims 



