568 Mr. Kirpy’s Description of Insects 
emarginatus. A. 
Long. corp. unc. 24. 
Habitat ——. Ex. Mus. D. Francillon. 
Introd. to Ent. iii. 446. 
Descr. Corpus nigrum. Caput rugosum. , Nasus apice sub- 
emarginatus. Verter cornu brevi emarginato. Occiput tu- 
berculis tribus obsoletis. Prothorax antice rugulosus, carina 
antica transversa utrinque abbreviata. Elytra piceo-nigra 
lævigata : sutura basi incrassata. 
The group forming the Fabrician genus Geotrupes (Scarabæus 
Latr.), or Mr. W. S. MacLeay's family of Dynastide, has not 
been closely examined by entomologists, or it would have been 
discovered to be resolvable into many more genera or sub- 
genera than Phileurus, Oryctes, and a few others that have been 
described ; at least if variations in the maville, mandibule, and 
other oral organs are admitted as sufficient indications of generic 
distinction. ‘Those separated above from Dynastes are not only 
distinguished by characters derived from these organs, indicating 
differences in their mode of feeding, but their stature and exter- 
nal structure also point out some diversity in their habits: the 
gigantic stature of Megasoma, particularly as to width, and the 
horns of the head and thorax of the male, distinguish the species 
belonging to it—for instance, M. Acteon, Elephas, Typhon, &c.— 
from every other group of Dynastide. The same remark applies 
to Dynastes, to which belong D. Hercules, Alcides, Tityus, Nep- 
tunus, &c. &c. With regard to Archon, at present I am ac- 
quainted only with the species above described, that seems cer- 
tainly to belong to the genus. Geotrupes Cadmus F. and affini- 
ties approach to it, but its maaille are different. 
Familia 
