Explanation of Plate XXVIII. 



(To be bound facing Plate XXVIII.) 



Fig. 1. Appendages, ends of clasps out of picture, x 30. Note the iEdceagus 

 (a little dislocated). The slender portion to the right, nearly two-thirds of the 

 whole length, is the free portion, projecting beyond the floor of the cavity. The 

 great proportionate length of this portion is an important character in the genus 

 (Aricia). Sufficient of the left clasp appears to show some of the spinous ridges 

 better seen in 



Fig. 2. A portion of the clasp x 60. These spinous ridges are along the 

 line dividing the armed from the soft half of the clasp. They are a marked 

 specific character, hardly a trace of them occurring in any other species of the 

 genus. 



