Amazonian Prionides. 
47 
2. Mallodon bajulus. 
M. hajulus, Ericlis. Consp. Ins. Col. Peru. p. 138. 
M. ocdpitale, Tliomson^ Physis^ I. p. 93^ ?. 
$ . Obloiigus_, depressus,, fusco-niger^ nitidus^ ge- 
narum processu bidentato : protlioracis disco polito, 
medio serie punctorum obsoletorum longitudinal! 
notato, lateribus punctato-rugosis^ niargine obtuse 
crenulato, angulis posterioribus denticulo acutiusculo 
terminatis. elytris punctulatis. Long. 1" b'" P 
(Ericbs.) . 
$ . Mandibulis brevibus,, supra et infra grosse punc- 
tatis ; capite grosse confiuenter punctato ; tborace 
plagis septem elevatis politis_, omnibus (exterior! 
utrinque excepta) basi conjunctis^ interstitiis crebre 
grossius punctatis ; elytris distincte punctatis ; pro- 
cessu prosternali conyexo_, yix punctato. 
Hah. — St. Paulo^ Amazons. 
I think it extremely probable that M. occipitale, 
Thoms. from Venezuela, belongs to the same species; 
specimens before me referable to this species differ only 
in the finer punctuation of the elytra. Mallodon hajulus j 
of Erichson, has been generally cited as the 2 of Chias- 
metes Limce of Guerin, but Erichson^s diagnosis lends no 
support to such an inference ; the terms depressus — 
genarum processu bidentato being quite inapplicable to 
Chiasmetes j on the contrary, they fit the present species 
of Mallodon which I found in the same tract of country 
where Erichson^s insect was discovered by the traveller 
Tschudi. M. Thomson makes no mention, in his mono- 
graph of Mallodon, of the form of the anterior angles of 
the cheeks, without which it is scarcely possible to give 
satisfactory descriptions of the species. 
Genus Stictosomus. 
Serville; Lacord. Genera, viii. p. 144. 
A remarkable genus, distinguished by its oblong-linear 
depressed form, long acute mandibles curving downwards 
