76 Orper—COLEOPTERA. Srection—PENTAMERA. 
rotundato (fig. 8 a) clava elongato-subovali, articulo quinto latiori (reliquis sensim ad apicem decrescentibus), articulo 
ultimo subquadrato apice rotundato ; prothorace subquadrato, latitudine longitudinem parum excedente, lateribus 
caput versus paullo latioribus rotundatis; et capite paullo latioribus, lateribus marginatis, angulis posticis 
quadratis, angulo ipso rotundato, disco in medio canali tenui, et intus angulos posticos impressione notato ; 
elytris depressis, lateribus parum setosis; pygidio rotundato fere levi; pedibus subelongatis, modice dilatatis, 
compressis, angulo externo tibiarum haud valde producto. 
Long. corp. lin. 6}. 
Habitat ; Adelaide, Australia. In Mus. Hopeiano Oxoniz. 
The antenne are comparatively rather narrow in this species; they are nearly two-thirds of the length of the 
elytra, which latter are three and one-third times the length of the prothorax. The clava of the antennz is 
broadest in the middle, viz. at the fifth jomt; the width of the sixth joint equals the length of the sixth, 
seventh, eighth, and half of the ninth joints united together; the length of the tenth joint equals that of the 
seventh, eighth, and half of the ninth joints together. 
Species 5 (9)—ARTHROPTERUS SUBCYLINDRICUS. 
Puate XV, Fic. 2. 
Elongatus, angustus, piceo-rufus, delicate punctatissimus ; capitis vertice plano; antennis longis angus- 
tioribus subparallelis, articulo primo subquadrato, angulo supero rotundato (fig. 2) articulo decimo duobus 
articulis precedentibus paullo longiori ; angulis lateralibus capitis pone oculos paullo prominentibus ; prothorace 
longitudine latitudinem superante ; convexo, linea media impressa, nee marginem anticum nec posticum attin- 
gente; elytris elongatis parallelis, longitudine latitudinem duplo superante; pygidio subquadrato punctato 
angulis posticis rotundatis ; pedibus latis compressis, angulo externo apicali tibiarum porrecto. 
Long. corp. lin. 6. 
Habitat; Australia. In Mus. Britann. 
The antenne are equal to three-quarters of the elytra in length, and the length of the elytra is twice their 
breadth. The length of the antenne (including the basal joint) is four times their width, which is nearly 
uniform. The width of the seventh joint is nearly equal to the length of the ninth and tenth joints united : 
the tenth joint is as long as the ninth, eighth, and one-fourth of the seventh joints united. 
Species 6 (10)—ARTHROPTERUS DENUDATUS. 
(Westw. Proce. Linn. Soc. June 19, 1849, p. 56.) 
PuatEe XV, Fie. 1. 
Piceo-castaneus, subnitidus, tenuissime punctatus; elytris magis nitidis; antennis longis, angustis planis, 
articulo ultimo duobus precedentibus longitudine «quali; capitis angulis posticis porrectis; prothorace capite 
paullo angustiori, supra subdepresso, truncato-cordato, linea media impressa; pedibus subangustis; tibiis 
omnibus angulo externo apicali acuto. 
Long. corp. lin. 6. 
Habitat ; Australia, ad ripas fluvii ‘ Mundarra’ dicti. In Mus. Hopeiano Oxoniz, F. Bond, &e. 
Species 7 (11)—ARTHROPTERUS BREVIS. 
(Westw. Proc. Linn. Soc. 1850, p. 101.) 
Puate XV, Fic. 6. 
Nigro-piceus, nitidus, levis, brevis, latus; capite punctato; antennis latis margine antico sc. infero sub- 
recto, margine supero serrato; prothorace cordato-truncato, linea media tenui longitudinali impressa, disco 
tenuissime punctato; elytris brevibus, fere levibus nitidis; tibiis anticis apice subemarginato, angulo apicali 
acuto; tibiis quatuor posticis apice externo obtuse rotundatis. 
Long. corp. lin. 3. 
Habitat; Australasia. In Mus. Hopeiano Oxonie, Hist. Nat. Paris (Verreaux), &e. 
