128 Analytical Notices 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 we 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 Entomologia 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. 
