Explanation of Plates. 



175 



FEMALE APPENDAGES. 



Plate XXXI. Shows the position of the hypostenia (prop) and 

 henia (rein) in the position of repose. 

 Fig. 1. Thetis, shows them in lateral view. 

 Fig. 1 shows that they are within the 

 seventh ventral sternite, and Fig. 2 

 that they may retreat even to within 

 the sixth. PI. XLII shows the parts 

 partially extended. Also PI. XL, 

 Fig. 2. Many figures show not quite 

 complete eversion, as referred to in more 

 detail under PI. XXXII. 

 Fig 2. Coridon, shows them on ventral view 

 (though the dorsal portion of the 

 preparation is almost in lateral view). 



Plate XXXII. Aricia eumedon, X 25. Fig. 1 shows the prop 

 not fully everted; this is often so in my pre- 

 parations in which the parts are twisted to get 

 an antero-posterior view of them ; ' by holding 

 the prop and rein in a straight line, the prop 

 cannot be fully extended without some twist- 

 ing or crushing elsewhere. The reason for 

 this is seen in Fig. 2, where the view is lateral 

 and the angle between the rein and prop 

 when fully extended is allowed to obtain. It 

 would appear that the prop is more or less 

 between the clasps, whilst the rein reaches 

 dorsally from their bases along the smooth 

 floor of the $ genital cavity to the aedeagus. 

 See PI. XXXIX and LIV. 



Plate XXXIII. 



Fig. 1. A. actis, x 25. 

 Fig. 2. A. coridon, x 25. 



Plate XXXIV. Fig. 1. P. icarus, X 25. 



Fig. 2. A. pheretes, x 25. These two species 

 have the terminal plate carrying the 

 ostium reduced more than in most 

 other species I have examined ; they 

 are, in fact, almost evanescent. See 

 also PI. XLIII. 



