360 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
wrinkled. Elytra feebly dilated posteriorly ; with fairly numerous but not dense, 
small, rugose punctures. Basal joint of front tarsi with a small black inner comb. 
Length, 3 mm. 
New South Wales : Upper Williams Biver (A. M. Lea). Type, in South 
Australian Museum . 
In many respects near 11. tuber culifrons, but on the male of that species the 
head is partly dark, and the tubercle when viewed from behind appears semi-double 6 ; 
on the present species when so viewed it appears to be higher and flat-topped, 
although hardly T-shaped. The colours are almost exactly as on H. apiciniger , 
but on the male of that species the excavation is trisinuate posteriorly, and the 
elevation is larger and obtusely pointed, as viewed from behind. 
A female on the same card as the type possibly belongs to the species ; it 
differs in having the head narrower and more convex, obliquely flattened in front, 
not excavated or tuberculate, black except for parts of muzzle, with more 
conspicuous punctures, antennae thinner and not serrated, abdomen entirely black, 
and front tarsi simple. 
Helcogaster calodemus n. sp. 
Flavous, in parts reddish flavous ; head, except the elevated parts in 
front, apical three- fifths of elytra, two apical segments of abdomen, and seven apical 
joints of antenna} black. With fairly numerous dark hairs and in parts sparsely 
pubescent. 
Head with an obtuse median elevation, crowned with two short longitudinal 
ridges ; with fairly numerous punctures, the base, more noticeably on sides than 
middle, transversely strigose. Eyes large and prominent. Antennae long and feebly 
serrated, only the second joint transverse. Prothorax slightly longer than wide, 
widely depressed near base ; with small, scattered punctures. Elytra comparatively 
long : with minute rugose punctures. Basal joint of front tarsi rather long, with 
a black inner comb. Length, 6 mm. 
Queensland : Brisbane (H. Hacker). Type (unique), in Queensland Museum. 
The colours are much as on II. tuber culifrons, except that more of the head 
is dark, but it differs from that species in being much larger, the eyes larger, with 
the frontal elevation smaller in proportion, black at the base and with two small 
disconnected, reddish elevations. Seen from behind the head appears much as 
figured for that species 6 except that the elevations are more conspicuous. There 
is also a narrow ridge from each eye to the base of an antenna. 
Helcogaster seticeps n. sp. 
cJ. Flavous or reddish flavous : apical three-fourths of elytra, apical segment 
of abdomen, and most of the preceding one black, four or five apical joints of 
antennae and parts of tarsi infuscated. With straggling black hairs, and in parts 
sparsely pubescent. 
Head with an obtuse median elevation connected with the apex by an obtuse 
ridge, a large shallow fovea near each eye. Antenna} rather long and feebly serrated. 
6 Lea, Trans. Ent, Soe. Lontl., 1909, pi. ii, fig. 10. 
