292 



the anterior portion representing the just-vanished vein, the 

 posterior the true furrow. 



If these points be kept in inind, there should be no difficulty 

 in determining all the Australian genera from the key here 

 offered. As most of the Australian forms are exceedingly rare 

 in collections, I have figured every known genus, in the hope 

 that our Lepidopterists and Coleopterists, even if they cannot 

 be expected to master the intricate venation of the wings, may 

 recognise their captures from the figures, and save them for the 

 advancement of the study of this interesting family, of which 

 Australia may yet be proved to possess a large number of 

 representatives. 



Key to the Australian Genera of the Family Hemerohiidce."' 

 Forewing distinctly falcate at tip, the margin of the wing 

 V)eing distinctly excavated posteriorly to the apex {Drepan- 



epferyx-group) 1 . 



Forewing either rounded or pointed at apex, but not falcate. 



( Hemfrobiu.s-growp ) 2. 



'Costal area of forewing broad at base, narrowing graduallj' 

 and regulai'ly towards ptei'ostigma. Ou^ present in hind- 

 wing -i. 



1 . -( Costal area of forewing narrow at base, then swelling out into 

 a kind of hump, and finally becoming very narrow again 

 towards pterostigma. C\i„ absent in hindwing, its position 

 occupied by a furrow Dnjjanoinina, n.g.(Typei). ijibhosa, n.sp.). 



rForewing distinctly pointed at apex 4. 



I Forewing rounded at apex 5. 



'Forewing with numerous (ten or more) radial sectors, and 

 with M^ and M„ both branched again close to mf. Hind- 

 wing with Cu, not united to Cuib distally. Three complete 



gradate series in forewing, two in hindwing , 



Drepanepteryx Burm. , (Palajarctic). (Type D. phalteno'idei^ L. ). 



'A. J Forewing with fewer (four to six) radial sectors, and with no 

 secondary branchings of M, and Mj. Hindwing with Cuo 

 and Cuib united distally. Only two complete gradate series 

 ill forewing; hindwing with outer gradate series complete, 



i liner series represented by a few cross-veins 



Drepanacra, n.g. (Type J). A?6???/fe McLach. ). 



* The Pahcarctie genus Drtpantpttryx is included, in order to show the 

 differences between it and the Australian species, which have hitherto 

 been included in it. 



