BY K. J. TILLYARD. 



455 



interesting details about these remarkable "quadrilaterals," 

 whose home is Australia and Papua. 



EXPLANATION OF PLATE VI. 



Fig. 1. — Nannodythemis australis Br. )C f ( x 2f ). 



Fig.2.— JST. Dalei, n.sp., <?( x 2|). 



Fig. 3. — N. ocxide7italis, n.sp. 5C f( x 2|). 



Fig. 4. — N. occidentalis, n.sp., pterostigma of hindvving of^( x 11). 



