ON COLEOPTERA , MOSTLY FROM QUEENSLAND. 3o7 
isolated fovese. The variety tasmaniensis , of that species, is quite as large, but its 
frontal impressions are different. II. effeminatus is similarly coloured, but differs 
in the front of the head and has longer and distinctly serrated antennae. II. puncticeps 
has head conspicuously punctate and different in front. As the legs are entirely 
black the comb of the’ male is not distinct under a magnifying glass, but under the 
microscope the basal joint of the front tarsi is seen to be curved, and to have a comb 
of numerous teeth. 
A male from Murray Island (A. M. Lea) appears to belong to the species, 
but is slightly larger (3*5 mm) and has more of the muzzle obscurely pale. 
Helcogaster trifoveatus n. sp. 
Deep shining black, head partly flavous, three basal joints of antenna*, 
and parts of front legs obscurely pale. Almost glabrous. 
Head wide, with three conjoined fovea between eyes, the median one small, 
each of the others slightly larger than an eye. Antenna rather long and moderately 
serrated. Prothorax moderately transverse, transversely impressed near base ; 
with small, scattered punctures/ Elytra with scarcely visible punctures. Length, 
2-0 2-2 mm. 
Queensland : Brisbane, in August and September (H. Hacker). Type, in 
Queensland Museum : cotype, in South Australian Museum. 
With the general appearance of H. tnangulifer , but the head has a trilobed 
excavation of which each side consists of a well-defined fovea, and the middle of 
a smaller one as a result the middle of its posterior margin is incurved, whereas 
on that species the middle of the excavation is triangularly produced forwards, 
besides being otherwise different. The excavation, except at the sides, and the 
base of the head arc black. As the front tarsi are black the comb of the male 
is scarcely visible under a magnifying glass. 
Mounted on the same card with the type male is a female, that differs from 
it in being longer, the head less dilated, nonfoveate, only part of the muzzle pale, 
the antennae shorter, less serrated, and the front tarsi without a comb. It is probably 
correctly mated, but I can scarcely distinguish it from some females of H. foveiceps. 
In fact, at present, as on former occasions, I have had to pass over many females 
of the genus as being impossible of differentiation, although the males have very 
distinctive features in the head and prothorax. 
Helcogaster frater n. sp. 
cJ. Black : pro thorax flavous, under surface of three basal joints of antennse. 
front tibiae, and parts of tarsi, and middle and hind knees obscurely pale. Head 
sparsely clothed, elsewhere glabrous or almost so. 
Head with a large, curved, shining impression near each eye, the two 
connected by a smaller semi-double impression, between middle and apex a somewhat 
convex space, with a feeble median line ; in places punctate but not strigose. Antennse 
moderately long and very feebly serrated. Prothorax almost as long as the greatest 
width, with a wide subbasal impression ; almost impunctate. Elytra moderately 
long, scarcely visibly punctate. Basal joint of front tarsi moderately long, with an 
inner black comb. Length, 3 mm. 
