31 
they quit in the evening, and fly about. Their common name is 
Water Beetles. 
Their larvæ are frequently found in ditches. 
GENUS XXV. CARABUS. Tab. 35 to 38. 
Linn. Syst. Nat. page 631. 
The antennæ of this genus are setaceous. 
In form, the thorax resembles a heart, with the point cut off, 
and is margined ; as are also their elytra. 
There are two families ; the larger Carabi, and the smaller ones ; 
both of which subsist on larvæ, or weaker insects. 
The larvæ live in the ground, or decayed wood, where they un- 
dergo their transformations, and subsist on small insects. 
GENUS XXVI. TENEBRIO. Tab. 39. 
Linn. Syst. Nat. page 674. 
Their antennæ are moniliform, resembling a string of beads, the 
last articulation being the roundest. 
The thorax is of a convex form, a little depressed and margined* 
The head is projected, or stretched forward. 
The Tenebriones are formed into two families; the first being 
those whose elytra are united, or without a longitudinal suture, 
wanting wings : and the second, such as are furnished with wings. 
Their larvæ are mostly found under pieces of wood, or any other 
object lying on the ground, in fields and gardens : the insects are 
common in houses, and have a very foetid smell, whence they are 
termed Stinking Beetles. 
