— 37 — 



the famous Kallima at the head. The circumstance, that LibytJiea 

 celtis makes use of its palpi and antennae for the simulation of a 

 stalk of a leaf, is very singular, as no tropical «leaf-shaped» but- 

 terfly does it. In this respect the example of L. celtis is unique. 

 In the majority of cases the rôle of this stalk is borne out by va- 

 rions appendices of the hind wings. 



The coloration completely conforms to the habits of the 

 insect. The well known species with tail-shaped appendices of the 

 hind wings hâve a habit of raising the fore part of the body, 

 applying thèse appendices to a stick and concealing their antennae 

 between the fore wings; the L. celtis, on the contrary, inclines 

 forwards, Stretches its palpi and antennae, touching with them the 

 leafless twig, and raises the anal angles of the hind wings. 



The form of the folded wings and the présence on the under- 

 side of the hind wings of a dark median vein — obser\ed only in 

 the L. celtis — make the resemblance to a leaf still more com- 

 plète. 



We hâve thus in this species a unique example of an Eui'o- 

 pean butterfly, which mimics the dead leaf as perfectly, and pos- 

 sibly even not worse, than several celebrated tropical species. 



■^H$- 



