COLEOPTERA. 15 



A third section, that of the Xylophili, will comprise the Geotrupes 

 of Fabricius, and some of his Cetonise. Here the scuteUum is always 

 distinct, and the elytra do not cover the posterior extremity of the abdo- 

 men. The tarsial crotchets of several are unequal. The antennae always 

 consist of ten joints, the three last forming a foliaccous club, of which 

 the intermediate leaflet is never completely concealed or encased by 

 the two others. The labrum is not salient, and its anterior extremity 

 at most is exposed. The mandibles are entirely corneous, and jut 

 out beyond the sides of the head. The maxillae are corneous or of a 

 solid consistence, straight and commonly dentated. The ligula is 

 covered by an ovoid or triangular mentum narrowed and truncated at 

 its extremity, the angles of which are frequently dilated. All the 

 legs are inserted at an equal distance from each other. 



A first division will comprise the Geotrupes of Fabricius. The 

 males diifer from the females in particular projections resembling 

 horns or tubercles on the head or thorax, or on both, and sometimes 

 also in the form of the latter. The epistoma is small, triangular, and 

 either pointed, or truncated and bidentated at the extremity. The la- 

 brum is almost entirely concealed. Here, the maxillae terminate in 

 a simple, coriaceous, crustaceous lobe, more or less pilose and with- 

 out teeth ; there, they are entirely squamous, pointed, and present 

 but a small number of teeth, accompanied with hairs. The mentum 

 is ovoid or in the form of a truncated triangle. There is no projec- 

 tion on the pectus. The tarsial crotchets are generally equal. The 

 scuteUum is small or moderate. Their colours verge on black or 

 brown. 



Sometimes the maxillae are terminated by a coriaceous or crustace- 

 ous edentated lobe, simply pilose or furnished with spinuliform cilia. 



Oryctes, lUig. — ScARAB.EUs, Lin. 

 Where the legs differ but little in length, and the four posterior 

 tibiae are thick, strongly incised or emarginated, with an extremely 

 wide extremity, which, in several, is as if stellated. 



O. nasicomis ; S. nasicornis,!^.; Rces., H, vi, vii. Fifteen 

 lines in length ; of a glossy maronne-brown ; point of the epis- 

 toma truncated ; a conical horn, more or less long, arcuated pos- 

 teriorly on the head ; front of the thorax cut obliquely, with 

 three teeth or tubercles on the elevated portion posterior to the 

 section ; elytra smooth. Found, together with its larva, in tan, 

 O. silenus ; G. silenus. Fab. ; Oliv., Col., I, 3, viii, 62, a — c. 

 Smaller than the nasicornis ; of a lighter but similar hue ; a 

 little recurved and pointed horn on the head of the male ; a deep 

 'excavation in the middle of the thorax ; the last joint of the two 

 anterior tarsi inflated, and with two very unequal hooks ; elytra 

 finely and irregularly punctured *. In 



Agacephala, Manh., 

 The anterior legs, at least in the males, are longer than the suc- 



* Add the Geotrupes, boas, rhinocencs, stentor, Sec. of Fabricius. 



The genus Orjjimus, Mac Leay, established on the G. bicolor of Fabricius, does 



