DYNASTIDiE. DYNASTES. 217 



and maxillae unarmed, mentum ovate, head cornute, thorax re- 

 tuse, &c. 



+ Sp. 1. nasicornis. Castaneus, clypeo corrmto, thorace retuso carina posticd 

 subtridentatd, elytris politis, suht'disswv: punctata- striatis. (Long. corp. 1 unc. 

 1—3 lin.) 



Sc. nasicornis. Linne. — Or. nasicornis. Steph. Catal. 114. No. 1184. - 



Castaneous or fuscescent, shining : head with a single horn, which in the male 

 is elongate, conic, recurved, the anterior margin of the clypeus abruptly pro- 

 duced in the middle and truncate; the thorax in both sexes retuse anteriorly; 

 and in the male the hinder margin of the retuse portion is produced into a 

 transverse obsoletely tridentate carina : elytra very glossy, finely and distantly 

 punctulated. 



The only known indigenous specimen of this insect was taken 

 " alive by a bricklayer, amongst old timber, on pulling down the 

 roof of a building at Chelsea." — Haworth in Entomological Trans- 

 actions, vol. i. p. 76. I think it very doubtful whether this fine 

 species be really indigenous, as it appears highly probable that the 

 specimen above alluded to may have been imported amongst some 

 of the continental plants which abound in the above vicinity, and 

 the insect occurs very copiously in rotten bark, the refuse of con- 

 servatories, and putrid wood, in various parts of the continent. 



Genus CCII. — Dynastes? MacLeay. 



Antenna with the basal joint stout, pilose; the second subglobose; the five 

 following very short, transverse; the remainder forming an elongate-ovate 

 triphyllous club. Palpi with the terminal joint ovate, acuminate: man- 

 dibles with the internal edge denticulated: maxillae dentated: mentum 

 subquadrate, convex, setose: head subquadrate: clypeus with the margin 

 thickened : thorax rounded, margined, obtusely cornute in front : body oblong, 

 convex: anterior tibia; tridentate; posterior transversely ciliated. 



The chief distinctions between this genus and Oryctes consist 

 in the form of the terminal joint of the palpi, the denticulated 

 mandibles and maxillae, the convexity of the thorax, unarmed head, 

 subquadrate mentum, &c. 



jSp. 1. biennis. Piceo-niger, thorace coma brevissimo obtuso, subtvsferrugineus 

 pilosus. (Long. corp. 6^ lin.) 



o 2 



