456 



COLEOPTERA. 



mentum, which is acuminate in front ; the head and thorax are 

 armed, with large horns in the males ; the first joint of the pos- 

 terior tarsi is not elevated, and there are no stridulating or- 

 gans. Our only species is Dynastes Tityus Linn., found in 

 the Soutliern States. It is over two inches long, of a greenish 

 gray color, with black spots scattered irregularly over the ely- 

 tra. Dynastes Herctdes Linn., one of the giants of the family, 

 is about six inches long. 



The genus Cetonia and its allies are flower beetles ; their 

 mandibles are feebly developed and in part membranous and 

 concealed with tlie other oral organs beneath the clypeus ; and 

 in flying they "do not raise or expand the elytra, as most Cole- 

 optera do, but pass the wings from the side, under the elytra, 



which do not at all 

 embrace the sides of 

 thebod3\" (Leconte.) 

 The immense Go- 

 liath beetles of the 

 western coast of 

 Africa belong to the 

 genus GoHathvs, in 

 which the clj^peus of 

 the males is generally 

 forked or armed Avith 

 horns. Dr. Harris has jDroposed the name of Hegemon "for 

 the subgenus, including the princely Scarabcejis Goliathns of 

 LinUtieus, together with the still more magnificent GoUathus 

 Druru of West wood, and the G. Cacicus of Gory and Per- 

 eheron." Of Hope's subgenus MecynorJdna, the Scarabaeus 

 Polyphemus of Fabricius is the type ; it is velvet green above, 

 with a pale buft' head and markings, and is two and a half 

 inches long, exclusive of the horns. Dr. Harris has also 

 described as new to science M. Savagii which has a velvet 

 green thorax, and velvet black elytra, with tawny bands and 

 spots ; it is about two inches long. The G. GoUathus is per- 

 haps the largest of all the Coleoptera ; specimens measuring 

 nearly four inches. Dr. G. A. Perkins of Salem, Mass., Avho 

 collected a large part of the fine series of specimens of these 

 Goliath beetles in the Museum of the Peabody Academy of 



Fiff. 413. 



