COLEOPTERA. 
563 
thorax. These beetles are of medium or large size ; in 
fact, the largest beetles known belong to this group. As 
with the flower-beetles, the claws of the tarsi are of 
equal size, but the fore coxae are transverse, and not promi¬ 
nent. 
One of the largest of our rhinoceros-beetles is Dynastes 
tityrus (Dy-nas'tes tit'y-rus). This is of a greenish-gray 
color, with scattered black spots on the wing-covers, or, if 
only recently transformed, of a uniform dark brown. The 
Fig. 682. 
male (Fig. 682) bears a prominent horn on the top of his 
head, and a large one and two small ones on his prothorax. 
The female has only a tubercle on the head. This insect is 
found in the Southern States; the larva lives in rotten 
wood. In the far West there is a closely allied species, 
Dynastes grantii (D. gran'ti-i), in which the large horn on 
the thorax is twice as long as in D . tityrus. In the West 
Indies there occurs a species, Dynastes Hercules (D. her'cu-les), 
which measures six inches in length. 
Several other genera occur in this country, in some of 
which the males have prominent horns; in others the horns 
are represented by tubercles, or are wanting, ihe following 
species represents the latter type. 
The Sugar-cane Beetle, Ligyrus rugiceps (Lig'y-rus 
ru'gi-ceps).—This beetle is a serious pest in the cane-fields 
of Louisiana, and it sometimes injures corn. Figure 683 
represents the adult, and its method of attacking a 
plant. 
