.NEW GENERA AND SPECIES OF COLEOPTEROUS INSECTS. 105 
Hab. in Africa Occidentali. 
Mus. Nay,-Mil. 
Descr. Antenne nigre, corpore longiores, articulis omnibus aculeato-spinosissimis, 
septimi sequentiumque (preter ultimi) lateribus ad apicem dilatatis, ultimo elon- 
gato subensiformi. Mandibule variolose, 4-dentate, dente interno majore, ceteris 
apicalibus, externé 1-tuberculate. Thorax niger, margine spinis acutissimis ar- 
mato, disco tuberculis difformibus scabroso-varioloso. Elytra ad apicem mucronata, 
nigro-brunnea, ad basin variolosa, posticé quasi vermibus erosa (scilicet disci 
variolis apicem versus minoribus), singula lineis quatuor elevatis quarum interna 
sequenti posticé conjuncta. Pedes antici ceteris longiores, scabri, femoribus 
densissimé spinosis, tibiis aculeatis ad apicem hamis inflexis quatuor armatis ; 
posteriorum femoribus supra infraque aculeatis, tibiis supra infraque subarmatis. 
Tarsi supra picei, subtis brunnei, pulvinati. Ungues picei, simplices. 
This magnificent insect is remarkable on account of the outer portion of its tro- 
chanters being pubescent. In size it is not surpassed by any coleopterous species with 
which I am acquainted. Many of the spines of the antenne are curved at the tip; and 
the hooks at the extremities of the tibie are evidently for the purpose of enabling the 
insect when at rest to support its weight. I am not aware that similar hooks have 
been hitherto noticed, except in the insect constituting the genus Chiasognathus, Steph. 
Their existence in the Chias. Grantii, and in the present insect, leads to the presumption 
of an affinity between the Lucanide and the Prionide. 
It was captured at West Bay, Prince’s Island, in the Bight of Biafra, and received 
from the sailors, on account of its gigantic size, the whimsical appellation of King of 
the Cockroaches. It is now in the Naval and Military Museum, to which it was pre- 
sented by Capt. J. Hayes, R.N., C.B., in honour of whom it has been named by 
Capt. Downes. 
2. Prionus Cuminell. 
Tab. XIV. Fig. 7. 
Pri. ater ; thoracis bifoveolati angulo antico utrinque dilatato hamato ; elytris varioloso- 
tuberculatis. 
Long. corporis 27 lin. ; lat. ad humeros 8, elytrorum 12. 
Hab. in Chili. 
Mus. Hope. 
Descr. Antenne nigre. Palpi picei. Mazille arcuate, 1-dentate, dente fer medio. 
Caput nigrum, punctatum, anticé depressum, ad antennarum insertiones elevatum, 
linea longitudinali inter oculos profundé impress’. Thorax anticé posticéque mar- 
ginatus, pilis aurantiis obsitus, angulis anterioribus in hamum productis, foveolis 
