248 ON SOME RARE AUSTRALIAN GOMPHIN^, 



but the latter are entirely yellow, except a small black spot at 

 bases; also the male A. heteroclitus carries under segment 7 a large 

 tuft of hairs, which is absent in A. comitatus. Finally, in A. hetero- 

 clitus female, the occiput is more yellow and lacks the sharp spine 

 which A. comitatus possesses, carrying instead a row of black hairs. 



4. AUSTROGOMPHUS MANIFESTUS, n.sp. 



(J. Unknown. 



9. Total length 48 mm., abdomen 36 mm.; forewing 27 mm., 

 hindwing 26 mm. 



Wings ; neuration strong, black. Pterostigma 3 mm., thick, 



black. Nodal Indicator 



12-14 9-10 

 9 9 



Head: eyes dark brown; occipital ridge black, touched 

 with yellow, but carrying no tubercle; vertex black, lateral 

 ocelli tubercled; antennce black with a basal yellow half- 

 ring; front yellow above, the black of the vertex advancing 

 centrally into the yellow; face yellow, with a broad black band 

 covering the lower part of front and upper part of postclypeus; 

 rest of clypeus yellow; labrum yellow, crossed by a vertical bar, 

 and with a basal black band and a black edging in front; labium 

 yellowish, mouth broadly black. Thorax: prothorax black, 

 with a small double dorsal yellow spot. Meso- and metathorax 

 black above; the mesepisternum marked with yellow as follows : 

 no border-mark, a short yellow dorsal line, interalar ridge yellow, 

 half-collar marks and dorsal stripes combined on each side to 

 form a beautiful " seven-mark " in which both the head and tail 

 are well pointed, and the tail ver}'' slightly curved; antehumeral 

 stripe represented by a fine line only about 1 mm. long followed 

 behind by a small triangular spot near wing-joins. On the sides 

 two thick black bands have merged together, isolating a tiny 

 yellow spot on the second lateral suture; a large upper irregular 

 oval patch of bright yellow is isolated between these bands and 

 an upper black band formed by the black upper groundcolour 

 extending downwards past the humeral suture; there is also a 

 large patch on E, a large roundish spot well forward on C, near 



