128 yinalyticiil Xotices of Books. 



employed in printing, and occupying no available space : the mass of 

 information contained in them is therefore imparted to the reader without 

 detracting from the appearance of the pages or adding to the bulk of the 

 volume. Thus w^e are enabled to judge of the sufficiency of the mate- 

 rials at Mr. Stephens' disposal, by the stops affixed to each species, 

 which are so used as to shew whether the insect has never been seen by 

 the authour, or has been seen by him in cabinets only, or has been seen 

 by him alive, or has been actually captured by him in his entomological 

 excursions. Those species of which he possesses foreign specimens 

 alone have their peculiar mark, and another mark is affixed to such as 

 are not in his own collection : in the latter instance he points out the 

 cabinets in which each is contained, indicating whether he has, or has 

 not, seen them in the places referred to. A mark is employed to distin- 

 guish such species as have occurred within the metropolitan district, so 

 as to form within the general list an Entoraologia Londinensis of much 

 service to the collector whose excursions are limited to the neighbour- 

 hood of the capital. Doubtful species are so marked, and are properly 

 placed in immediate succession to those of which they may eventually prove 

 to be merely varieties: and every insect is referred to which has on any 

 authority whatever, been stated to be a native of the British Isles. 

 Among these the doubtful native is distinguished from those exotic insects 

 which can only have found their way into the British list by mistake. 

 The value to the student of such various information need not be insisted 

 on, and in conveying it so fully and in so accessible a form, Mr. Stephens 

 has discharged, with the greatest credit to himself, a task which will 

 secure for him the thanks of every British entomologist. 



On the arrangement of the larger groups propounded in the present 

 work we need offer no remarks, its great object, as we conceive it, being 

 the elucidation of species and synonymy, a point of view in which its 

 utility is incontestable. 



