550 DESCEIPTIONS OF NEW SPECIES OF AUSTROGOMPHCS, 



collinear. Eyes brown, edged with yellowish beneath. Antennce 

 thick, short, black, with a yellow line on inner side of base. 

 Front greenish-yellow. ClypcMs greenish-yellow, separated from 

 the front by a black band in the suture, broadest in the middle. 

 Lahrum greenish-yellow, bordered all round with black. Lahnim 

 dull yellowish. Mandibles yellow; 7)io7Uh thickly edged with 

 black. 



Thorax. — Prothorax black with a yellow collar in front; 

 behind, an irregular transverse yellow band, thickened at sides 

 and curving outwards in the middle so as to embrace two small 

 round dorsal yellow spots, very close together. Meso- and meta- 

 thorax black above, marked with bright yellow as follows : — A 

 thin line along the dorsal carina, which is elevated, forming an 

 obtuse-angled vertical ridge; on either side a large mark in the 

 form of a broad figure 7; below this mark on either side three 

 yellow spots on a broad black band; the first spot close to the 

 front wing-join and the tail of the 7, the second below the middle 

 of the 7, the third close up to the angle of the 7 and often con- 

 junct with it. Be3^ond this last spot and close to it is a small 

 round yellow spot, just over the mesocoxa. The sides of the- 

 thorax may be described as bright yellow with two parallel bands 

 of black; the first band irregular, the second fairly straight, and 

 both meeting near the metacoxa and forming a broad irregular 

 cross-band running up around the cox^. Wing-joins black 

 spotted with yellow; scuta and scutellas bright yellow, separated 

 by black ground-colour. Underside pale yellowish. Legs black, 

 except profemora, yellow touched with black; other femora with 

 a yellowish stripe; elbows spotted with 3'ellow; coxae with large 

 yellowish spots at bases. 



Abdomen. — 1-2 swollen, 3-7 narrow, 8-10 clubbed. Colour : 

 1 yellow with a transverse black band interrupted by the dorsal 

 carina; 2 black with a large dorsal bright yellow mark, the 

 shape of which varies in difierent specimens, being sometimes a 

 narrow isosceles triangle with its base at the base of the segment, 

 and sometimes like a chess-pawn; two large yellow spots on each 

 side, merging into one another; this segment also carries a pair 



