18 Mr. J. O. Westwood's Descriptions 



thorace antice latiore, nietathorace parum compresso utrin- 

 que spiracula instructo, apice recte truncata ; abdominis 

 pedunculo elongate utrinque versus basin tuberculo minuto 

 instructo ; segmento sequenti pedunculo latiori semi-ovali, 

 reliquis parum constrictis. 



Long. Corp. lin. 1| — 5. 



Habitat in Africa occidentali tropicali. D. Savage. 



DESCRIPTION OF THE FIGURES. 

 Plate I. fig. 3. One of the Soldiers, rather larger than the insect; Za,h,c,d, 

 the heads of four of the different sized individuals ; 3e, maxilla; Zf, 

 instrumenta labialia. The lines indicate the natural length of 

 different individuals. 



III. Descriptions of two new Goliath Beetles from Cape 

 Palmas, in the Collection of the Rev. F, W. Hope. By 

 J. O. Westwood, F.L.S., &c. 



The selection of characters of evidently minor importance — which 

 have been well termed artificial ones — for the discrimination of 

 groups, whether of high or low rank,' — which seem to afford 

 very satisfactory results in our distribution of species or genera, 

 becomes more and more difficult in proportion to the increase of 

 our knowledge of the species of such groups. Taking, for example, 

 those African Goliath beetles which have the prothorax broadest 

 behind, with a simple terminal lobe to the maxillse, and long 

 fore legs, in the males ; we have art'ifc'ially defined one group 

 as distinguished by having the fore legs externally dentated, 

 and the upper surface of the body velvety ; and a second as 

 aving the fore tibiae not externally dentated, and the upper sur- 

 face of the body (in the tropical species) brilliantly polished. 



Within a very short time, however, Mr. Hope has received 

 from Dr. Savage, who has indefatigably assisted in forwarding 

 our knowledge of these interesting insects, two new species which 

 disturb these previous arrangements. In one of these insects we 

 have a velvety upper surface, combined with the externally sim- 

 ple fore tibiae of the males, (although it is true that they exhibit a 

 tendency to become toothed,) whilst the horn of the head is still 

 further analogous to that of several of the males of the second of 

 these two groups. The other species agrees more decidedly with 

 the first of these two groups, in its velvety upper surface, and 

 externally tridentate male tibiae ; but the general appearance of 

 the insect, its comparatively small size, the form of the horn of the 



