COLEOPTERA 



iS7 



Burlington County, New Jersey, in 191 6, and has since spread into 

 Pennsylvania and New York. The adult insect is about the size of the 

 Colorado potato-beetle, but slightly longer 

 (Fig. 270). The head and thorax are shin- 

 ing bronze-green in color, with the wing- 

 covers tan or brownish, tinged with green 

 on the edges. Along the sides of the abdo- 

 men are white spots, and two very distinct 

 white spots at the tip of the abdomen below 

 the wing-covers. The larva resembles the 

 larva? of May-beetles. 



IV. The rhinoceros-beetles. — ■ The name 

 rhinoceros-beetles was suggested for this group 

 by the fact that in many species the male 

 bears a horn on the middle of the head. In 

 addition to this horn there may be one or 

 more horns on the 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 

 prominent. 



One of the largest of our rhinoceros- 

 beetles is Dynastes tityrus. 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 male (Fig. 271) bears 



Japanese beetle, enlarged 



Fig. 271. 



a prominent horn on the top of the 

 head, and a large one and two small 

 ones on the prothorax. The female has 

 only a tubercle on the head. This in- 

 sect is found in the Southern States ; the 

 larva lives in rotten wood. In the far 

 west there is a closely allied species, 

 Dynastes grant it, 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, 

 which measures 6 inches in length. 



The sugar-cane beetle, Euetheola 

 rugiceps, is a serious pest in the cane- 



Fig. 272. 



Y\.H.U\GV\0\_S. 

 - The sugar-cane beetle. 



fields of Louisiana, and it sometimes injures corn (Fig. 272). 



