Darwin- Wallace Celebration. 77> 



vi. Butterflies concealed when at rest by their surroundings or their 

 attitudes. 



(a) Conspicuous white or yellow Butterflies seeking yellow 

 leaves to rest upon. 



(ft) The general effect of common natural backgrounds in more- 

 or less aiding concealment. 



(c) Special rest attitudes aiding concealment. 



vii. Special adaptations in Tettigides (a group of Grasshoppers). 



() The pronotum developed into a leaf-like appendage greatly 

 aiding the concealment of the insect. 



(b) The hind- tibia and tarsus modified to make an oar for 

 swimming under water. 



viii. Indian species of Conopidm (Flies) closely imitating Eumenidcs 

 and Vespidce, (Wasps) on which their larvae are probably parasitic. 

 The specimens were taken together about nearly dried-up springs 

 at Matheran, Western Ghats. 



ix. An insular fauna compared with that of the mainland. 



Many Jamaican butterflies differ slightly in colour from their 

 nearest South American representatives ; they are usually 

 brighter in tint, with more fulvous and less black. 



Exhibited by Dr. G. B. LONGSTAFF.. 



WEST TABLE. 



CASE 1. Personal relics and a selection of manuscripts in the- 



handwriting of CARL VON LINNE. Amongst them are his 



Lapland Journal, his Autobiography, an early sketch of the- 

 flora of his native place, a walking-stick, etc. 



