﻿i6i 



of the scutelliim white, the frons is coloured differently and the 

 male pygophor different. T am indebted to my friend Mr. Van 

 Dnzee for a pair of his piicUa. * 



19. astyanax sp. nov. 



PI. X, fig. 20; PI. XIV. figs. 13-15. ** 



Closely allied to D. piicUa, but smaller, the genae and scutel- 

 lum entirely black, and the lateral margins of the frons more 

 rounded laterally. In the short-winged form, the tegmina are 

 subtruncate, and broadly margined with white apically. Spur 

 with about 14 spines. 



Male pygophor exceedingly remarkable. The anal tube is 

 elevated and shaped somewhat like a square hood. The lateral 

 margins of the pygophor close to the anal tube project acutely 

 and somewhat curvedly. Genital styles truncate apically. the 

 angles being acute and jirominent. The oedea.gus has a crown of 

 4 long spines (or is apically elongately quadrifid in other words). 



Length about i]/^ (brach.), 2'4 (macr.) mill. 



Hab. New South Wales. Mittagong (Jan., K.). 



20. algebra sp. nov. 



PI. X, figs. 16-17: PI. XV, figs. 15-16. 



Closely allied to D. puella but (in the short-winged forms at 

 least ) the tegmina are deeply fuscous and more opaque ; basal 

 half of commissure and a tiny spot near the apex internally 

 whitish. The median keel of the frons is rather thick and whit- 

 ish, and the lateral keels of the pronotum are straight and reach 

 the hind margin. Spur with 33 spines. 



Male pygophor suboval, broadly produced near the anal tube, 

 w^hich has 2 projections from the ventral wall. The genital styles 

 are widened and truncate apically, the outer angles rounded, the 

 inner acutely produced. 



Length 1% mill (brachypterous form only known). 



Hab. Queensland, Kuranda (Aug.), Cairns (July-Aug.). 



* Dr. Meliphar kindly sent me some years rro a male of the Sinlialese amv<>ms 

 Motschoulskv, the male pygophor of which is figured PI. 14 figs. 10-12. It is >*ubyotun- 

 date viewed end on and has a flat projection on each side near the anal tube, t>irni"S 

 a little outwards and very conspicuous in profile. The anal tube has no spino&e pro- 

 jections. The oedeagus i's apparently short. Genital styles less arched than in pmlia 

 and dilated apically, being shortly bifid, the angles acute. 



** PI. 10 f. 20 is not quite accurate, the lateral margins of the vertex should be more 



concave. 



