BY R. J. TILLYARD. 



713 



retinacula, subcostal and subdorsal, is an excellent one, which I 

 gladly adopt. Consequently it will be necessary to alter the 

 headings in the Table on p. 311 of Part i. (24), and to correct 

 the lettering of Text-figs. 15-16 in that paper. 



Text-Fig. 16. (corrected). 

 a, Base of fore wing of Synemon sp., male, from Killarney, Q., viewed 

 from below, to show the correct positions of the two retinacula ; 

 rt, subcostal retinaculum; rV , subdorsal retinaculum, (x 12). 

 b, Section through same, taken along the line xy in fig. a, to show 

 the positions of mechanical advantage of the two retinacula; 

 fr, frenulum in situ. Other lettering as on p. 535. 



At the time Part i. was written, I hail no fresh material of 

 Synemon. Last summer Mr. E. J. Dumigan, of Clermont, 

 Queensland, very kindly seemed for me a number of fresh speci- 

 mens of an undetermined species. I have descaled and cleared 

 the wings of some of these, and give herewith a figure showing 

 the exact positions of the two retinacula in the male (Text-fig. 

 Ki. a) . It will be seen that the subdorsal retinaculum is a 

 bunch of stiff hairs arising on the underside of the membrane, 

 in the space between the strong convex vein Cu and the weak 

 concave vein Cu,, which is obsolescent in this genus. 



