24 



Serville has, in the present as m other instances, combined two types 

 of form in a single genus, constituting each a division ; now it appears 

 to me, that as generic subdivision has been carried so far, it must be 

 extended farther, and that those species only can be considered con- 

 generic, which exhibit a close similarity in those structural charac- 

 ters which are employed as the basis of subdivision. Audinet-Sei'ville 

 himself lays the greatest stress on these characters in his descriptions, 

 yet unites groups in wliich they obviously vary. 



Genus. — Amphirhoe, Newman. 



Generi Phoracanthae affinis, et certe ejusdem familiae, (forsan pro- 

 prie intervenit genus nuper propositum, Calli- 

 rhoe, cujus prothorax elongatus nullo modo 

 armatus, et femora plus minusve tumida) : ca- 

 put porrectum, prothorace angustius ; antennae 

 corpore longiores, 11-articulatae, articuhs 3 — 5 

 apice 1-spinosis: prothorax capite paullo lon- 

 gior, antica constrictus, dorso convexus, lateri- 

 bus rotundatus, nidlo modo ai'matus : elytra 

 apice truncata : pedes elongati, femoribus apice 

 repente tumidis. 



Amph. decora. Fusca, puncta; elytra ferrugineo-fusca, utroque 

 linea mediana gracili juxta basim intemipta flava omato. (Corp 

 long. "8 unc. lat. '15 unc.) 



Inhabits Van Dieman's Land. For a drawing of this insect, which 

 is unique in the cabinet of Mr. Melly, I am indebted to Mr. Westwood. 



Genus. — Elaphidion, Serville. 



The reader is requested to append to the genus noticed at page 6, 

 the following descriptions. 



Elaph. Marylandicum. Magnum, obesum, fiiscum, punctum, la- 

 nugine cinerea obsitum, spatiis glabris irroratum: antennae cor- 

 pore manifesto longiores, articuhs 3 — 7 apice 1-spinosis : elytra 

 truncata, utroque angulo spina acuta annato. (Corp. long. 1*15 

 unc. lat. "325 unc.) 



Stenocorus Marylandicus, Fab. ' Syst. Eleu.' ii. 306. 

 Callidiimi „ Oliv. 70, tab. i. fig. 5. 



