Explanation of Plate IV. 
Fig. 1. Ciopidesthes voltae. Genitalia in profile, p. 8. 
„ 2. „ arescopa „ „ „ p. 9. 
,, 3. ,, thyrsis ,, ,, ,, p. 10. 
,, 4. ,, litJius ,, ,, ,, p. 11. 
All the i^rofile preparations of the genitalia have been mounted 
with as little pressure as jiossible so as to examine the organs as 
near the state of nature as could be. The few vertical views have 
been cut and then spread out absolutely flat. All have been 
magnified 50 diam., then reduced a third. 
