BY R. J. TILLYARD. 249 



<;oxa, and finally a very large irregular patch of bright yellow 

 occupying most of B and lying close to abdomen; underside with 

 a large dull black patch (see Plate xxii., fig. 4); notum black; 

 scuta and scutella yellow. Legs black, a tiny spot on elbow of 

 forelegs, and a bright yellow band on underside of profemora. 

 Abdomen: 1-2 swollen, rest Jong and rather slender, 7-8 

 slightly broader, 9-10 narrow, cylindrical. Colour black, marked 

 with yellow as follows : 1-2 with a rather broad dorsal mark 

 pointed anally, sides with large irregular blotches of yellow; 3, a 

 pair of large basal lateral semi-oval spots; 4-6, with smaller basal 

 spots; 7, basal third bright yellow, partly crossed on each side 

 from below by a transverse black line; 8-10, jet black; vulvar 

 scale of 8 with a peculiar prominent projection, 1 mm. long, 

 bifurcated, black, and shaped as shown in the figure (see Plate 

 xxii., fig. 7). Appendages: short, 0'6 mm., bright yellow, 

 straight, conical, pointed, rather close together. 



Hah. — Kuranda, N.Q. Very rare; January, 1909. A unique 

 female taken by Mr. E. Allen. 



This species is probably nearest to A. hifurcatus^ of which the 

 female is not known. It cannot be the female of that species, 

 bowever, as the markings of head, thorax, and abdomen are 

 entirely different. Judging from the slenderness of the abdomen 

 of the female, the male should be exceedingly slender, as is the 

 male of A. hifurcatus. 



5. AusTROGOMPHUS DoDDi, n.sp. 



(J. Unique. Total length 43 mm., abdomen 32 mm.; forewing 

 25 mm., hind wing 24 mm. 



Wings: costa yellowish outwards, rest of neuration black 

 Pterostigma 3mm., bicolorous, having a pale creamy centre 

 surrounded with black. Memhramde almost nil. Nodal 

 Indicator \li 9-10 



1 10-11 10 



Head: eyes brown; occipital ridge 0*8 mm., black with 

 a large yellow spot; vertex black, with a small round yellow 

 spot behind, enclosed in front by a high ridge or tubercle, 



