COLEOPTERA. 



457 



size, especially in America. Dynastes Hercules, a great insect of a 

 fine ebony black, with its elytra of an olive grey, is not rare in the 



Fi e '. 436. Head of Oryctes naslcornis, 



435- Oryctes nas-con-.'.s, male. 



437- Head of Oryctes nasicornis, 

 female. 



Antilles. Its thorax is prolonged into a horn as long as its body, 

 and bent round at the extremity ; its head has also a long horn 

 standing erect. The females want these appendages. Fig. 439 

 represents the Go/of a claviger of Guyana. 



The Geotritpes are insects almost as common as the chafers. As 



Fig. 438. Xylotrupes dichotomus. 



their name reminds us, they make holes in the ground, which they 

 scoop out, particularly in meadows, under cow-dung which has grown 



