Explanation of Plates. 



173 



Fig. 

 Fig. 



right angles to it; the zone remains 

 fixed, and on it the aedeagus is rotated 

 to the position shown. 



Aedeagus of Agriades thersites, X 40. 



Aedeagus of Agriades datnon, x 40. These 

 two figures show the swollen end char- 

 acteristic of Agriades, the zone right 

 up on the bulb has attached scraps 

 from the floor of the cavity, the short- 

 ness of the portion beyond this is 

 obvious, there is hardly a trace of everted 

 membrane. 



Plate XXV. Fig. 1. P. sieversi, X 30; 2. P. hyrcana, X 30; 3. C. 

 semiargus, x 45. These show the dorsal 

 position of the aedeagus, and the zone 

 close to its free extremity. 



Plate XXVI. Fig. 1. A. amanda, aedeagus, x 40. 



Fig. 2. V. optilete, aedeagus, X 40. 



Fig. 3. V. optilete, $ appendages, except part of 

 clasps, X 30. These show the zone, 

 with portions of floor membrane at- 

 tached, the short portion of aedeagus 

 beyond differing in structural detail 

 from that of Agriades. Fig. 3 shows 

 very well how the floor membrane at- 

 tached to the zone is taut enough to 

 restrain any forward movement of the 

 aedeagus; a contrary impression might 

 arise from Fig. 2, where a good deal of 

 floor membrane remains attached, limp 

 and crumpled, being torn loose from its 

 other attachments. 



Figures on PI. XXIV, XXV and XXVI 

 show also the unusual length of flat, 

 smooth (». e. free from any sort of 

 armature) field afforded by the floor 

 of the genital cavity between the 

 aedeagus and the base of the clasps. 



Plate XXVII. Fig. 1. <$ appendages of PL eversmanni, and 

 Fig. 2 of PI. pheres, x 30. These both 

 show a greater length of aedeagus 



