382 Mr. G. C. Champion on the Tenebrionidx 
HELzts. 
Helzus, Latreille, Régne Anim., ed. 1, ii., p. 301 
(1817). 
Helzxus perforatus. 
Helxus perforatus, Latr., Régne Anim., ed. 2, u1., p. 
32, t. 3, fig. 6 ; de Bréme, Essai Monogr. Cossyph., 
i. p. 55, t. 6, fig. 2, and t. 1, figs. 1, 2; 5—3); 
Macl., Proc. Linn. Soc. N.S. W., ii. (2), p. 641. 
Hab. W. Australia—Fremantle. 
Originally described from Kangaroo Island. Under 
stones in sandy places (Walker). 
PTEROHELZAUS. 
Pterohelzus, de Bréme, Essai Monogr. Cossyph., 1., 
p- 27, t. 1, figs. 1—4, B (1842). 
Pteroheleus nigricormis, 1. sp. 
Pterohelxus nigricornis, F'. Bates, in litt. 
Broad oval, moderately convex, above and beneath, the legs 
and antennz black, the upper surface opaque. Head smooth, the 
epistoma separated on either side from the front by a fine oblique 
groove, the sides of the front broadly arcuately expanded, slightly 
raised, and projecting beyond the eyes ; the latter not prominent, 
very finely faceted, and separated by a space about equalling the 
width of one of the eyes as seen from above ; prothorax almost 
smooth, strongly transverse, fully three times as wide at the base 
as it is long in the centre, very deeply emarginate in front, deeply 
bisinuate behind, the sides arcuately and very rapidly converging 
from the base, the disc moderately convex and sometimes with 
indications of a fine impressed central line, the margins broadly 
explanate, the outer edge reflexed, the anterior angles rounded, 
the hind angles sharp and prolonged backwards; scutellum smooth; 
elytra a little wider than, and nearly four times the length of, the 
prothorax, rapidly arcuately narrowing from the middle, obliquely 
truncate on either side at the base, and with rather obtuse humeri, 
the disc moderately convex, somewhat abruptly declivous beyond 
the middle; each elytron with seven or eight equidistant coste, 
which become altogether obsolete on the apical declivity, the 
interspaces each with a double row of very fine, lightly impressed, 
punctures not extending to the apex; the margins broadly ex- 
