VUl 



PREFACE. 



whilst chromolithograpby is better suited for reproducing sharpl)'- 

 definod bright colours : some allowance will doubtless have to be 

 made for the figures of the American species that have been reproduced 

 from coloured photographs ; when this is the case, it will always be 

 found stated in the text. 



E. KAY LANKESTEJI, 



Direclor. 



British Museum (NaUu-ul History), 

 June 2Ulli, 1903. 



