242 ON SOME RARE AUSTRALIAN GOMPHIN^, 



straw-colour; gence cream-coloured; mouth thickly edged with 



black or dark brown. Thorax: j^'^othorax black; a yellow 



spot on neck; behind this an elongated yellow spot on collar; a 



tiny double yellow spot in the middle, and a single small spot 



behind next mesothorax. Jleso- and metathwax black marked 



as follows with bright lemon-yellow :— on the mesepisternum, a 



small border mark, a short thin mid -dorsal line; a pair of very 



conspicuous "seven-marks,"' in which the head is short, thick, and 



blunt, and the tail rather broad and not much pointed; the ante- 



bumeral band is represented by a short fine line, with a large 



roundish spot at some distance behind; in some specimens the 



spot only is present. Sides of thorax shiny black, isolating two 



large oval yellow spots, one mainly in C, but with the upper part 



in Bj and the other low down on D close to abdomen; besides 



these, a yellow mark on E, a small spot on C near wings; a small 



round spot on Z>, close under the wing-joins, and a larger round 



spot on D, in front (see Plate xxii., fig.l); iwtumh\Q.ck, scuta and 



scutella bright yellow. Legs black, underside of profemora with 



a yellow stripe, coxae pale cream-coloured. Abdomen: 1-2 



swollen, 7-10 strongly clubbed. Colour black, marked as follows: 



1, a large transverse dorsal yellow spot; 2, auricles large, bright 



yellow; behind them an anal lateral yellow mark; 2-6, a yellow 



dorsal line, widest on 2, reaching nearly the whole length of 



segments 2-4, but only about two-thirds of 5, and barely half of 



6; each of these segments is marked low down on each side by a 



pale 5^ellow streak, enlarged at base into a basal sublateral spot, 



and running alongside the ventral carina, which is black; 7, first 



three-fifths bright yellow, crossed about 1 mm. from base by a 



fine black line about 1 mm. long; rest of 7 black, with a small 



anal lateral spot on each side; 8, an irregular yellowish basal 



sublateral mark on each side, and an anal lateral yellowish spot, 



somewhat triangular; 9, black, suture slightly touched with 



yellow; 10, black. Below, 8 extends downwards on each side in 



s. large curved plate or sheath. Appendages: superior, 



1 mm., very divergent, cornate, slightly hairy, bases broad and 



separated; colour bright yellow; each carries underneath an inner 



