LEAF-CHAFERS. 
83 
The following three species may be taken as representatives of the 
genus: Trox porcatus, Say, nearly half an inch long, the elytra with 
elevated, interrupted lines, and numerous transverse punctures on the 
interstitial spaces; T. terrestris , not quite quarter of an inch in length, 
the elytra with raised obtuse lines on which are little fascicles of short 
hairs ; and T. striatulm , only three-twentieths of an inch in length, with 
regular grooves between the ridges on the elytra. 
Tribe Yin. 
LEAF-CHAFERS. 
Herbivora lamellicornia. Thalerophaga, MacLeay. 
The Chafers, or leaf-eating lamellicorns, are easily distinguished from 
the Dung-beetles, by the tips of their abdomens being always uncovered 
by the wing-cases, by their usually more slender legs, and by their 
lighter and often variegated colors. As we have seen above that the 
Cicindelidie represent the lion and tiger amongst the higher animals, 
so the present tribe may be regarded as representatives of the rumina- 
ting quadrupeds, being, as a general rule, the most bulky of coleopte- 
rous insects, and exclusively vegetable feeders. 
They generally feed, when in the beetle state, upon the leaves of trees, 
but many of the smaller species devour the petals and pollen of flowers. 
The Anomahe are particularly destructive to the foliage of the grape- 
vine. 
The larva} are found partly in rotten wood and partly in the earth, 
where they feed upon the roots of grasses and other plants. The com- 
mon white grub furnishes a familiar example. 
Like the preceding tribe, they comprise four families, which can usu- 
ally be distinguished by their general aspect and coloration, but which 
exhibit but few distinctive organic characters. 
They may bo tabulated thus : 
A. Head or thorax, or both, almost always armed with one or two 
horns or tubercles ; upper lip concealed beneath the elypous, 
which is not separated from the front by a suture. Size gen- 
erally large, or very large ; color often black or blackish : 
Dynastid^e. 
A A. Head and thorax unarmed; labrum often partially visible in 
front of the clypeus, which is separated from the front by a 
transverse suture, (except (Jetonikbe.) Size various; color 
never black, (except in a few Cetoniidie.) 
