30 



Studies ill the Hybrid Bistoninae. IV 



retains its place between the two ovipositor lobes ; in spite of this, the 

 latter are quite complete as are also their pair of directing rods. 



Massed in the seventh segment, and lying free therein, are the valves 

 and, as in the last case, these still remain almost, although not quite, in 

 the pupal condition. One valve seems to have made its way to the 

 exterior and is to be seen superimposed on and lying parallel to the 

 anterior part of the ovipositor. 



DD = 1st pair of rods. Z)'D' = 2nd pair of rods. 17' = Duplicated and 



enclosed.valves. PP= Pupal tubercles. t7=Uncus. F= Valve. 



The two pupal tubercles marking the points at which the valves 

 should have gained access to the outside may be detected at /. 



The ostium lies to the left but the other female parts, unless over- 

 whelmed in the valves and their enormous hirsute covering, defy 

 detection. 



(6) Wing parts, PI. I, Fig. 5. Genitalia, Text-fig. 8. 



In this case, as far as these sexual structures are concerned, an 

 almost perfect approach to femaleness is made. 



We have a perfect ovipositor correctly furnished with a normal pair 

 of outer directing rods, the only unusual feature being the appearance 



