278 DTN'A.STIX^. 



The i^ygidium is smooth, rounded and very finely rugose in both 

 sexes. The front tibia is armed with four teeth, the uppermost one 

 small, and there is only a ve.->tige of a tooth upon the lower face. 

 The middle and hind tibiae are very acutely digitated. 



S • The cephalic horn is longer than that of the female and 

 the posterior margin of the thoracic cavity forms, in the middle, 

 part of a very broad trisinuate projection. The pygidium is very 

 convex and quite hairless. 



$ . The lateral rugose areas of the pronotum unite behind the 

 carina and the pygidium is entirely devoid of hairs, as in the male, 

 and slightly pointed. 



Lenr/th 28-33 mm. ; breadth 14-15-5 mm. 



BcJRMA : Minhla (Comoro, 1881-2). 



Type in the Genoa Museum ; cotype in the British Museum. 



0. nudicauda resembles the much more widespread 0. rhinoceros 

 very closely, but the elytra are much less coarsely punctured, 

 besides which the pygidium is without the basal fringe in the male 

 and the thick liairy clothing found in the female of that species 

 and is of a different shape in the latter sex. 



251. Oryctes rhinoceros. 



Scarabseiis rhinoceros, L., Syst. Nat. \, 1758, p. 34G ; Oliv., Ent. 



i. (3), 1789, p. 34, pi. 18, tig. I(j6. 

 Oryctes rhinoceros, Burm., Handb. Ent. v, 1847, p. 202. 



Black or pitchy, with the lower surface reddish and clothed with a 

 short tawny pubescence. It is elongate-cylindrical in shape. The 

 dypeus is sharply forked, with the points directed forwards, and 

 the horn rather broad at the base, tapering to a blunt point and 

 rugosely punctured except at the base behiud. The pronotum \s 

 almost as long as it is broad, strongly margined all round, with 

 the front angles sharp, the hind angles obliterated, the sides 

 strongly rounded behind and convergent in front. There is an 

 approximately oval excavation extending from the front to beyond 

 the middle of the disc and surrounded by a smooth carina which 

 forms behind a short truncate process directed forwards. There is 

 an elongate depression outside the carina on each side and another 

 in each front angle. All the depressions are rugose and the 

 remainder of the surface is smooth and shining but minutely 

 punctured. The scuteUum is rugose, with a smooth outer margin ; 

 and the elytra are strongly and closely punctured, the punctures 

 being annular and forming a juxta-sutural line and three pairs 

 of other lines i*ather wide apart, with closely punctured intervals : 

 the sides and apices are more finely punctured. The propygidium 

 is very large, lobate beliind and rather closely ridged or striated. 

 The front tibia is armed with four teeih, the uppermost one 

 small, and there is also a sharp and conspicuous tooth on the lower 

 face. The middle tibije are much shorter than the hind ones aud 

 all are very acutely digitated at the end. 



