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GENUS IV. PTINUS. Tab. 7. 
Linn. Syst. Nat. page 565. 
The antennas of this genus are filiform, the extreme articulation 
being longer than the others. 
The thorax is orbicular, with an indented margin, into which 
the head is occasionally drawn back. 
The larvas, or maggots, of the Ptini conceal themselves in decayed 
trees, and old wooden furniture ; some live and pass their trans- 
formations among dried vegetables, &c. 
GENUS V. HISTER. Tab. 8. 
Linn. Syst. Nat. page 566. 
The first articulation of the antennas is curved, and flattened ; 
the last is much larger than the others, with the appearance of a 
solid knob, which is composed of several rings, so formed that the 
insect can open and display that part at pleasure. 
The head is concealed within the body, and the maxillae, or jaws, 
which are like forceps, are only seen. 
The fore legs are dentated, as in the Scarabasus. 
The insect, as well as its larva, are found in the dung of horses, 
and other animals. 
GENUS VI. GYRINUS. Tab. 7. 
Linn. Syst. Nat . page 567. 
The antennae are club-formed, stiff, and shorter than the 
head. 
They have four eyes, two on the top, and two under the head. 
