BY R. J. TILLYARD. 



45: 



Characters. 



N. australis Br. 



N. Dalei, n.sp. 



N. OCCIDENTALS, 



n.sp. 



Size : — 









/Total length 



20-21 mm. 



23-25 mm. 



24-27'5 mm. 



~ J abdomen 



13-13*5 mm. 

 14-14*5 mm. 



15-16 mm. 

 17*5-18*5 mm. 



15*5-18 mm. 



° ' j forewing 



18-19*5 mm. 



^hindwing 



13 5- 14 mm. 

 19-21 mm. 



16 •7-17*7 mm. 

 22 mm. 



17-18*5 mm. 



1 Total length 



} abdomen 



24-26*5 mm. 



12*5-13 '5 mm. 



15-16 mm. 



14 mm. 

 17*5 mm. 



16-17*5 mm. 



* ' \ forewing 



18-19*5 mm. 



' hindwing 



14*5-15 "5 mm. 



16*7 mm. 



17-18*5 mm. 



Neuration : — 





Antenodals of forewing 



5 



5 



6 



Postnodals ,, 



4 



5-6 



6-8 



Antenodals of hindwing 



4 



4 



4 



Postnodals ,, 



4* 



5-6 



6-8 



Number of discontinu- 









ous postnodals 



1 



2 



2-4 



Katio of proximal to 









distal portion of upper 









side of triangle of fore- 









wings 



1 : 1 



2: 1 



2: 1 



Triangle of hindwings.. 



abnormal. 



$ . normal. 

 2 • abnormal. 



normal. 



Number of cross-ner- 









vules in submedian 









space of hindwing.... 



2 (rarely 3). 



1 



1 



No. of single cells fol- 









lowing triangle of fore- 









wings in discoidal area 



3-5, generally 5. 



2-3, generally 2. 



1-4, generally 1-2. 



Sectors of arculus 



at or near base of 



one -third from 



one -third from 



arising 



arculus. 



base of arculus. 



base of arculus. 



Position of inner angle 



slightly beyond 



at arculus. 



at arculus. 



of triangle of hindwing 



arculus. 







Colouration : — 









Pruinescence in adults 



complete on tho- 



slight darkening 



nil. 





rax and base of 



of thorax. 







abdomen. 







Antehumeral thoracic 









stripes 



narrow, 

 absent. 



narrow, 

 present in male. 



broad . 



Rlack mark on front 



absent. 



Black markings on ab- 









domen of nrale 



on segs. 1-G. 



on segs. 1-6 

 (smaller). 



on segs. 1-2. 





Shape: — 









Constriction of segs.3-5 



very considerable 



moderate. 



slight. 



Dilatation of 7-9 



very great. 



considerable. 



fair. 







One specimen with 6 on one side only. 



