INTRODUCTION. 



IN preparing the present Catalogue, the principal object 

 has been to give a complete list of all the specimens of Myria- 

 poda contained in the collection of the British Museum, indi- 

 cating, at the same time, the peculiarities of each, as regard 

 age, sex, variety of colouring, condition, habitation, and the 

 source from whence it has been derived. 



With this view, the different individuals of each species 

 contained in the collection are indicated by the letters a, 6, c, 

 &c., following the name of the species and its synonymes. 



The habitat is given as particularly as the materials pos- 

 sessed by the Museum permit. The specimens which have 

 been presented to the Museum, have the name of the donor 

 marked immediately after the habitat. 



The collection is arranged in conformity with a paper on 

 the classification of these animals, lately read by Mr. Newport 

 at the Linnean Society, which will appear in the forthcoming 

 volume of the Transactions : and as the Museum collection has 

 been the chief source from whence Mr. Newport has derived 

 his materials, they may be regarded as the type-specimens of 

 the species described in that paper, and in Mr. Newport's pa- 

 per in the ' Annals of Natural History.' The collection also 

 contains the type -specimens of the species described by Dr. 

 Leach, in the 'Zoological Miscellany;' of the North- 



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