In the Entomologist's Useful Compendium , the characters of 
Cillenum are introduced from the MSS. of Dr. Leach, who 
first distinguished it as a genus ; and it is very naturally placed 
between the Bembidia and Trechi, to the former of which 
groups it is allied by the structure of the organs of manduca- 
tion, especially the palpi which have hitherto been unnoticed, 
and to the latter (particularly that portion called Blemus ) in 
habit. 
The strongly armed anterior legs of these predaceous insects 
are admirably adapted to their habits of life : the spurs as they 
are termed, with which the four posterior legs of the Adephagi 
and other tribes of beetles are furnished, are for the purpose of 
enabling them to secure a firm footing upon the objects they 
wish to destroy and tear to pieces ; and there is little doubt 
but the notched anterior legs of the Carabidse are to seize and 
retain their prey ; for the limb or antenna of an insect being 
received into the notch, and at the same time the moveable 
spine at the lower angle being pressed upon it, the victim 
would be effectually secured. In the species before us a 
structure is exhibited which we have never before observed, 
and which in a great measure confirms our opinion ; we allude 
to the two spines produced at right angles below the notch, 
between which, the end of the moveable spine arising from the 
opposite angle is received ; those also attached to the basal 
joints of the tarsi are unusually strong. 
Cillenum laterale is a very local insect in this country, and 
appears to be scarcely known upon the Continent. It was 
first discovered by Dr. Leach, who found it near Porto Bello 
on the Firth of Forth, in the months of May, June, and July; 
and it has since been taken in abundance at Cley on the coast 
of Norfolk by Mr. Brightwell. 
Mr. Dale took a very minute carabideous insect under a 
stone at Charmouth, near Lyme Dorset, the 11th of last May, 
whose trophi, as well as we can ascertain, resemble those of 
Cillenum, but in habit it is more like Trechus; we have named 
it C. minimum . 
The plant is Coronopus Buellii (Swine’s Cress). 
