REVIEWS. 
109 
There is yet one more deviation from the ordinary generic arrangement, 
which Mr. Dawson thus announces :— 
“ The modern subdivisions of genera having proved unsatisfactory, being some¬ 
times founded on almost imaginary differences, at any rate far from constant, are 
altogether rejected, and I have merely inserted the names of the subgenera in brac¬ 
kets for the convenience of those English entomologists who have been most 
accustomed to Stephens’s arrangement, without meaning to attach to them any 
importance otherwise.” 
Accordingly, about 35 genera, and one or two subgenera, of various 
authors, almost all of them contained in Stephens’s Manual, are swept 
away at a breath. 
On the whole, then, whether we regard the arrangement of the families, 
genera or species, according to Mr. Dawson’s Monograph, the pervading 
spirit is that of determined compression. Thoroughly dissatisfied with the 
received arrangement, and continually complaining of the confusion into 
which it has been thrown, he has set himself in good earnest to simplify 
as miich as possible. He has applied himself to his task with most laud¬ 
able patience and assiduity, and has evidently turned to good account 
the great advantages of which he was possessed. The result of his labours 
is now before the entomological world, and even should it eventually be 
proved that he has occasionally judged rather too strictly, great thanks would 
be owing to him for his searching scrutiny of received opinions, out of 
which nothing but good can eventually come. Even were one-half only of 
his strictures to be finally established, it would be more than enough to 
justify the observation with which this notice opened, as to the great im¬ 
portance of each section of the science being separately and thoroughly 
investigated. 
Having said so much of what Mr. Dawson has rejected, it is necessary 
that some notice should be taken of the new species which he has intro¬ 
duced, beautiful figures of which have been taken by Mr. Westwood, and 
with the dissections and several outlines, representing those external parts 
of the insects of certain closely-allied species, in 'which the “ most material 
distinctions of character are to be found, as an additional aid in deter¬ 
mining the differences between them,” are made the subject of three ad¬ 
mirably executed and valuable plates at the end of the volume. The 
number of “newly introduced” species, of which entire figures are given, 
is fifteen, distributed among the following genera:— 
Dyschirius 2. Now first introduced. 
Badister 1. 
Calathus 1. 
Anchomenus 1. 
Harpalus 1. Now first introduced. 
Stenolophus 
Trechus 
Bembidium 
1 . 
2 . 
6 . 
Now first introduced. 
;Four species now first 
introduced. 
