38 
externe bidentate (fere ut sodontis),; clypeus antrorsum 
angustatus, a capite sutura subtili angulata in medio tuber- 
culo armata divisus; caput haud carina marginatum; pro- 
thorax equalis ; pedes breves crassissimi, tibiis anticis extus 
obtuse bidentatis (processu apicali excluso) posterioribus 4 
transversim bicarinatis, tarsorui posticorum articulo basali 
fortiter ad apicem dilatato; processus prosternalis validus 
hirsutus ; organa stridulationis nulla; maris tarsorum anti- 
corum unguiculus externus crassus bifidus. 
I cannot refer the species for which I propose this name to any 
existing genus, nor is it clear in which of his subtribes of 
Dynastides Lacordaire would have placed it, as the absence of 
sexual characters in the head and prothorax would associate it 
with subtribes in which the basal joint of the hind tarsi is of 
very different structure. It is generically very close to Pentodon 
australis, Blackb., but differs from it enter alia by the much more 
strongly dilated basal joint of its hind tarsi. 
H. maculatus, sp. nov. Sat elongatus; minus nitidus ; testaceo- 
rufus, suturis et carinis corporis pedumque fere omnibus et 
prothoracis utrinque macula laterali infuscatis; capite crebre 
subfortiter ruguloso, clypeo antice truncato leviter reflexo ; 
prothorace quam longiori dimidia parte latiori, antice forti- 
ter angustato, sparsim subtiliter (vix manifeste) punctulato, 
lateribus (superne visis) parum arcuatis; scutello magno 
levi ; elytris vix (vel nullo modo) striatis, obsolete seriatim 
punctulatis; pygidio antice crebre subtiliter postice vix 
manifeste punctulato. Long., 6—8].; lat., 35—5 1. 
I have seen several examples of this insect; one of them has 
the elytra faintly striate with indications of about four obsolete 
coste and some very faint but distinct punctures ; in the other 
examples this sculpture is scarcely discernible ; the difference is 
not sexual. I have no doubt they all appertain to one species. 
Thursday Island ; also Cape York. 
NOVAPUS. 
NV. rugosicollis, Blackb. At the time when I described this 
species (Proc. Linn. Soc. N.S.W. 1890 p. 305) I was doubtful of 
the sex of the type but concluded with hesitation that it was a 
male. Subsequent examination of more recently acquired 
examples of the genus has satisfied me that it is a female. I have 
no doubt the male has a large excavation on the prothorax. 
NV. nitidus, sp. nov. Mas. Brevis; latus; nitidus; subtus sat 
dense rufo-hirsutus ; piceo-rufus ; capite cornu recurvo acuto 
armato; prothorace quam longiori fere duplo latiori, antice 
valde angustato, excavatione permagna a basi ad apicem 
extensa pernitida fere levi impresso (hujus lateribus sursum 
