( cxxxv ) 



E.fastuosella, Z., 



follows the arrangement of subpurpurella generally, but 

 has decidedl)' more complex and useful clasping organs. 

 Whilst in 



E. semipurpurella, Steph., 



we find the genitalia poorly developed, weak and look- 

 ing very ineffectual, but the aedooagus is very large with a 

 very long sheath, the latter no doubt is a compensating 

 development. Turning to the genus Micropteryx we find a 

 marked advance. I can only refer to two species at the 

 present time. 



In Micropteryx seppella, F., 



the tegumen is again a part of the ninth segment, being 

 extended along the dorsal line in the shape of a battledore ; 

 the liarpagones are fully developed as clasping organs, and 

 are attached to the lower part of the ninth sternite ; they 

 have a highly curved process attached to them, which is 

 covered for half its length by a small curtain terminating in 

 a horseshoe of small round tubercles, from each of which 

 emanates a fine strong spine curved at the extreme apex; 

 the sedoeagus is quite small. 



Micropteryx calthella, L., 



has the tegumen also a part of the ninth segment, but it is 

 more strongly chitinised ; the liarpagones (tenth segment) are 

 very similar to seppella, but the middle process above them 

 is a large broad lobe with a double row of tubular sensory 

 organs — I cannot call them hairs or spines for they appear 

 to be abruptly truncated at their apices ; the oedoeagus is 

 rather longer than in seppella. The anal orifice is shown' as 

 a short hairily terminated tube just above the mid process. 



The Hepialidae, with an independent origin from the previous 

 group, have retained very complex genitalia, evidencing in this 

 respect but small advance. With the large size of many of 

 this family and their restless habit, we are justified in assuming 

 that the clasping apparatus would necessarily be large and 

 strong, and I find this assumption is fairly correct. The 



