78 Orper—COLEOPTERA. Srection—PENTAMERA. 
Two other Australian species of this sub-genus, Arthropterus MacLeayii Donov., and Arthropterus Hopii 
Westw., are figured in my Arcana Entomologica, vol. ii. pl. L, figs. 4 and 5. 
Five other species of the sub-genus, from Gayndah, Australia, are described by William Macleay, Esq., 
in the Transactions of the Entomological Society of New South Wales, vol. ii. part ii, 1871, the characters of 
which are subjoined, in order to make the present article complete up to the present time. Without actual 
comparison with typical specimens, I am afraid to pronounce on the possible identity of some of them with some 
of the species above described. 
ARTHROPTERUS WESTWOODII. 
‘Piceous brown, subnitid, and finely punctured. Antennz short, with the first jomt transverse, obtusely 
angled, and truncate; the second to the ninth inclusive more than four times broader than the length, and the 
tenth more than twice the length of the preceding. Head slightly concave between the eyes, truncate behind, 
and attached to the thorax by a thick neck, with the posterior angles prominent, obtuse, and clothed with stiff 
hairs. Thorax scarcely longer than the breadth, rounded at the anterior angles, slightly narrowed behind, 
truncate at the base, margined and ciliated on the sides, and broadly impressed on the median line, more 
especially towards the base. Elytra rounded at the apex, with a small sinuation at the external angle. Legs 
and under side of the body thinly punctured, anterior tibie with the external apical angle subacute, and the 
apex deeply emarginate. Intermediate and posterior tibize with the external apical angle very broadly rounded 
and ciliated, and with the apex emarginate. 
‘Length, 53 lines.’ 
ARTHROPTERUS MASTERSII. 
‘Piceous black, subnitid, and finely punctured. Antenne with the first joint square, obtusely angled and 
truncate, the second to the ninth inclusive three times broader than the length, and the last more than twice 
the length of the others. Head slightly concave between the eyes, truncate behind, and attached to the thorax 
by a thick neck with the posterior angles obtuse. Thorax much longer than the breadth, and very slightly 
narrowed behind, with the median line deeply impressed in the middle, but not extending to the apical and 
basal margins, and with an indistinct fovea near the basal part of the lateral margin. Elytra truncate at the 
apex, and slightly notched at the external angles. Legs and under side of the body closely punctured. The 
four anterior tibize have the external apical angle acute and the apex deeply emarginate; the posterior are rather 
more obtusely angled. 
‘ Length, 64 lines.’ 
ARTHROPTERUS ANGUSTICORNIS. 
‘Of a piceous brown colour and nitid. Antenne narrow; the first joint square with the angles obtuse, 
the second to the ninth inclusive twice as broad as the length, the last equal in length to the two preceding 
united. Head depressed on the vertex and coarsely punctured, with a prominent ciliated tubercle at the 
posterior angles, and the base truncate. Thorax subcordiform, coarsely and transversely punctured, and with 
the median line lightly impressed in the middle. Elytra thinly and finely punctured, and truncate at the apex, 
with two small notches at each external angle. Body beneath, and legs, thinly punctured. All the tibiz have 
the external apical angle very acute. 
‘Length, 53 lines. 
‘This species seems to approach the 4. parallelocerus of Westwood.’ 
ARTHROPTERUS KINGILI. 
“This species differs from A. angusticornis in being of a pitchy red colour, in having no depression on the 
top of the head, in the tubercle at the posterior angles of the head being much smaller, in the thorax being 
more ciliated on the sides and having the median line more marked, in the external apical angles of the tibie 
being less acute, and in the narrower form of the whole body. The antennz are of the same character as those 
of A. angusticornis. 
‘Length, 53 lines.’ 
