246 ON SOME RARE AUSTRALIAN GOMPHIN^, 



Head: eyes dark brown; occipital 7ndge 1mm., black with 

 a large squarish greenish- j^el low spot; vertex black, ocelli 

 prominent, the two lateral ones raised on tubercles; antennce 

 black, with a pale ring at bases; front with a greenish-yellow 

 band above, a thick black band on face; clyi^eus greenish-yellow 

 with a thick black band; labrum with a large black subtriangular 

 centre surrounded by a yellowish border; labium dull dirty brown 

 edged with yellowish. Thorax: -protliorax black, a small 

 double dorsal spot and a pair of lateral spots, greenish. Meso- 

 and metathorax black above, the mesepisternum marked as follows : 

 a greenish border-mark, an elongated half-collar mark on each 

 side: dorsal band shortened to an elongated oval mark, the upper 

 'eiid of which is some distance from the half -collar, so that no 

 "seven-mark" is formed; antehumeral stripe narrow, slightly 

 curved, ending in an enlarged subtriangular spot near wing-joins; 

 all these marks rich green. Sides of thorax greenish-yellow, with 

 two triangular subparallel narrow black bands along the sutures: 

 the upper one narrowed in the middle and extending in a sharp 

 point downwards in front, the lower verj'^ narrow but less 

 irregular; E, black with a yellow stripe (see Plate xxii., tig.3); 

 oiotum black, scuta and scutella yellowish; underside dull yellowish, 

 with two cloudy black spots. Legs thick, black, underside of 

 profemora with a yellowish stripe. Abdomen: 1-2 swollen, 

 3-7 very narrow, 8-10 sharply clubbed, 8-9 broadly sheathed 

 below. Colour black marked with yellow as follows : 1-2, a 

 longitudinal dorsal band, sides and auricles largely yellow; 3, a 

 narrow transverse basal band, formed by two roundish spots 

 touching dorsally; a small round central spot; 4-7, a narrow basal 

 band; 8, a round basal spot on each side, sheaths edged with 

 yellow, and carrying a tiny tuft of hairs; a tine transverse anal 

 line; 9, a suspicion of a fine transverse anal line; sheaths touched 

 with yellow; underside of 9 dull yellow; 10, broad, black. 

 Appendages: superior very wide apart at bases, converging 

 towards tips; 2 mm., thick, strong, somewhat hairy, subcylin- 

 drical, broad and blunt at tips; flattened slightly on the inside 

 just before tips, and then hooked or curved inwards into a small 



