BY R. J. TILLYARD. 351 



another genus to I'eceive this species. As I have already shewn, 

 cross-veins often occur as " freaks" in one or more triangles of all 

 members of tlie group, and are especially likely to occur in the 

 more densely reticulated females. From analogy with -S'. regina, 

 we might expect the male of .S'. miranda, if it is ever discovered, 

 to have only two divisions in the anal loop, and to possess a 

 much simpler reticulation. 



5. Synthbmis leachii Seljs. (Plate iv., fig. 4.) 



Selys, loc. cit. 1871 and 1874; Synthemis martini Tillynrd, 

 Pruc. Linn. Soc.N.S. Wales, 1907, p. 726. 



Tiie identity of the species described by me under the name 

 " S. martiai " with .S'. leachii Selys, hns been established beyond 

 doubt through the kindness of Dr. Laidiaw, who compared co- 

 types of my series, sent by me to him, with the original type of 

 4e Selys. This identity could scarcely have been guessed other- 

 wise, asde Selys' type is an immature and damaged specimen of so 

 pale a colour that it was more like a specimen of >S'. tnacrostigma, 

 at first sight. App-trently, too, the distinguishing maik of this 

 species, viz., the four antehnmeral thoracic spots, weie almost 

 oliliterated. 



Tlie following description is an abridgment of my original one, 

 and contains all the points necessary for a clear understanding of 

 the differences between this and the other species : — 



$. Total length 55-57, abdomen 42-44, hindwing 32-33 mm. 



Wings: pterostiy in%neKv\y 3 mm., black; membranule ueAv\y 

 5 mm., pale greyish. 



Head: eyes bright greenish in living insect, brown behind 

 witli a creamy mark; vertex (\a.vk hvov/n; front liaiiy, widely cleft 

 medially, dark brown with a creamy spot on each side; sides of 

 face greyish; clyjjeus greyish tinged with brown, labrum aud 

 labium pale dirty flesh-colour. T ii o r a x : prothorax dark brown 

 with a pale mark in front. Mtso- and metathorax dark brownish 

 with a metallic tinge; a straw-coloured line on dorsal ridge; four 

 fair-sized creamy antehumeral spots, the two front ones often 

 -cleft, the other two usually round. Sides of thorax with a broad 



