358 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
New South Wales : Tamworth (A. M. Lea). Type (unique), in South 
Au s tr alian Museum . 
In general appearance strikingly close to H. strigiceps, but the head is not 
strigose, and the impressions are different ; just inwards of each eye, and slightly 
longer than it, there is a deep, curved, polished impression, the interspace being 
opaque, densely punctate, and with a feeble semi-double impression. Seen from 
behind the head appears to have two minute interocular elevations, partly obscured 
by black seta?, : from some directions the base of the excavation appears almost 
evenly quadrisinuate. The antenna? also are decidedly longer, most of the joints 
being longer than wide ; on that species they are mostly transverse. On H. atriceps 
the eyes are smaller, the head is densely punctate almost throughout, and the 
impressions are different. The mediobasal sinus decidedly narrower than the lateral 
ones distinguishes from the description of H . nigriceps . Tn some lights the elytra appear 
somewhat purplish. 
Helcogaster apiciniger n. sp. 
Reddish flavous ; apical three-fourths of elytra (less on the sides), part 
of metastcrnum, two apical segments of abdomen, tip of the preceding one, and 
seven apical joints of antenna? black, tarsi and parts of middle and of hind tibiae 
infuscated. In parts with very fine pubescence, and with a few short, scattered 
hairs. 
Head with a large trilobed median excavation, a conspicuous tubercle arising 
from the middle part, and sloping down to the front. Antenna) long and feebly 
serrated. Prothorax slightly longer than wide, with a wide depression near base ; 
almost impunctate. Elytra rather long, with minute, scattered, rugose punctures. 
Basal joint of front tarsi rather long, with an inner black rim. Length, 4-5 mm. 
9- Differs in having the head smaller and almost entirely black, non-excavated, 
with an obtuse median ridge from middle to apex, antenna? thinner and front tarsi 
simple. 
New South Wales : Upper Williams River (F. E. Wilson and A. M. Lea). 
Types, in South Australian Museum. 
Of the species with bicoloured elytra and abdomen tipped with black in the 
male, it differs from H. bacchanalia and trisinuatus in the strong interocular elevation. 
The base of the cephalic excavation trisinuate distinguishes from H. tuberculiceps , 
calodemus , and seMceps. There is a faint bluish gloss on the dark part of the elytra. 
From behind the trisinuate excavation of the head disappears, but there is a 
conspicuous triangular median elevation. 
Helcogaster abdominalis 11 . sp. 
cj. Flavous : apical third of elytra, metastcrnum, a spot on each segment 
of abdomen, the apical one, and six or seven apical joints of antenna? black or blackish, 
apical joints of tarsi slightly infuscated. With sparse and comparatively short, 
blackish hairs. 
Head with a deep interocular impression, its base trisinuate, with three small 
elevations in front ; base punctate and transversely strigose. Antenna? rather long 
and feebly serrated. Prothorax slightly longer than wide, rather deeply transversely 
impressed near base ; with a few small scattered punctures. Elytra feebly dilated 
posteriorly, scarcely visibly punctate. Basal joint of front tarsi moderately long, 
with a small black inner comb. Length, 4-5 mm. 
