244 ON SOME RARE AUSTRALIAN GOMPHINiE, 



Apparently this species disappears into the bush soon after- 

 emergence. One day, at the end of January, 1908, I took five 

 or six males flying up and down the creek, but I have never seen 

 them there since. All the other specimens I have, were taken^. 

 one or two at a time, in the teatree bush fringing the creek. 

 The insect is very fond of sitting perched high up on a sj)rig of 

 teatree, sometimes be3'ond reach of the net. If disturbed, it flies 

 off with bewildering swiftness and settles on another bush. I 

 have named it A. mdaleucce because of this habit. It is not at 

 all easy to capture. The females are very rare, and I have never 

 seen a pair in cop. 



2. AUSTROGOMPHUS BIFURCATUS, n.sp. 



g. Total length 43 mm.; abdomen 32 mm.; forewing 26 mm.,, 

 hindwing 25 mm. 



Wings: neuration black. Pterostigma 3 mm., black, not 

 very broad, nearly straiglit below. Meinhranule almost niL 

 Nodal Indicator 13-14 8-9 

 I 10 9-10 



Head: eyes brown; occipital ridge nearly 1mm., black, 

 hairv; vertex black; front ocellus transparent; front blacky 

 with a rather narrow yellow band along frontal ridge; post- 

 clyiJeus black, hairy, a small yellow area on each side next the 

 anteclypeus, which is yellow; lahrum black, gence yellow; labium 

 pale straw-colour, mouth edged with dark brown. Thorax: 

 2)rothorax rather broad, black, a yellow spot in front, and a small 

 yellow central double spot. Meso- and metathorax jet black above, 

 the markings of the mesepisternum as follows : no border mark, 

 no mid-dorsal line, interalar ridge yellow, half-collar and dorsal 

 stripe combined to form a " seven-mark " on each side, the head 

 being a fairly long oval, rather pointed, to which the tail is 

 attached more than half-way from the upper angle; the tail itself 

 is rather narrow and pointed; antehumeral stripe narro»v, ending 

 near wings in a subtriangular enlarged spot. On the sides the 

 colour is yellow, but the black groundcolour from above intrudes 

 beyond the humeral suture so as to cover the most of B and half 



