164 



MARIUS THETIS. 

 PLATE XIX. Fig. 1 * 



Pap. Thetis, Fabr Nymph. Thetis, Godart — Pap. Petreus, 



Cramer, PL 87, fig. D, E ; StolVs Supp. PI. 2, fig. 2, A, 

 (caterpillar), fig. 2, B, (chrysalis) ; Swainsorfs Zool. Illus. 

 Pis. 59 and 110. 



This singular looking insect is distinguished gene- 

 tically by the peculiar shape of the wings, and the 

 equally remarkable appearance of the caterpillar. 

 Of the former the posterior edge of the primary pair 

 is concave, and the apex is distinctly truncated ; the 

 same edge of the secondary wings has two long 

 linear tails, the anal one shorter and curved out- 

 wards, the external long, obtuse at the extremity, 

 and turned somewhat obliquely outwards. The 

 caterpillar is naked, with four long fleshy filaments 

 on the back, and two others projecting from the 

 hinder part of the head ; the chrysalis likewise with 

 several projecting filaments. 



The Marius butterfly is a native of Guiana and 

 Brazil. The colour of the upper side is tawny, vary- 

 ing somewhat in the shade according to the sex, 



* On the Plate the under figure should have been marked 

 1, the upper 2. 



