326 Mr. G. T. Bethune-Baker's Notes on the 



find the separated anus has apparently disappeared, though 

 the fusion of the tegumen, i. e. the tergite section, with 

 the short girdle, viz. the sternite section, remains as in 

 Trochilinm. Aegeria doryliformis has quite a typical 

 armature, and it differs so much from T. apiformis that the 

 systematist would at once conclude that it must represent 

 a different genus, and the conclusion would be borne out 

 by further investigation. In addition to the anal orifice 

 just mentioned, the tegumen is quite different in shape ; 

 it is deeply bifid on the dorsum, and carries on each side 

 an extraordinary brush; it might quite well be called hke 

 — and very like — unto a carpet brush, long and tapering, 

 with long bristles having split spatulate extremities ; there 

 is a large cavity in the tegumen within which these brushes 

 can evidently be withdrawn, whilst at the rear of the cavity 

 is a broad hollowed apron of chitine that would completely 

 fit over the aperture and fall on to the front apex of the 

 tegumen ; the whole arrangement is most peculiar and 

 wonderful. The clasps are large, wedge-shaped in this 

 species, with the inner surfaces covered with long fine 

 bristles with split extremities ; with the exception of the 

 lower hinder portions of the clasps, these bristles cover thei 

 whole surface. The fulcrum, in Rhopalocera generally only 

 a furcate fine stem, is here developed into a broad copious 

 hollowed support for the aedoeagus, with a fringe of 

 formidable spike-like bristles on the upper edges of each 

 side ; this fringe is evidently capable of entire inversion 

 in a forward direction, and might well act as an exciting 

 agent to one or both sexes during mating. I do not know 

 an organ to compare with this at all in other groups ; the 

 figures I give will, I hope, enable the reader to understand 

 the action of these unusual developments. The aedoeagus 

 is a long narrow tube very diverse from that of T. apiforme. 

 The saccus, an important character, is long and is fused 

 with both the girdle and the clasp, the latter being rather 

 unusual, and these organs are generally distinctly jointed 

 on to the girdle, which is short erect but quite defined. 



Paranthrene tineiformis again differs from Aegeria in 

 very essential details ; the eighth segment as in that genus 

 is provided with great tufts of long hair in both sections of 

 the segment, which arise from two closely tubercled cushions 

 — two in each section. The separated anus in this genus 

 is as marked as in Trochilium, though different. The 

 tegumen has a long uncal extremity totally at variance 



