HORN EXPEDITION—COLEOPTERA, 
2G5 
I’ufescentibus; clypeo antice einarginato ; capite minus crebre granulato ; protho- 
race sequali dupliciter (subtiliter et subfortiter) nec I’ugulose punctulato, puncturis 
in disco minus crebi’o nec ajqualitei’ (ad latera confertim) dispositis ; elytiis sat 
fortiter striatis, striis puncbulatis, interstitiis minus conv'exis nullo modo carini- 
fonnibus inter se sat ajqualibus intus crenulatis, liumeris dentatis. Long., 21 1. ; 
lat., 1 1. 
This species is very distinct from any other known to me. It is characterised 
by its compai’atively large size, the evenness and but slight convexity of its elytral 
interstices (none of which are cariniform), and the sti ong crenulation of the same 
(on their sutural side) by the punctures of the striie. It is perhaps nearest to 
A. australis, liar., which, however, has carinifoi’in elytral interstices. Sir W. 
Macleay described a nund^er of species under the name Ammoscius, which appear 
to me to be Atanii, and of which the descriptions are for the most part very 
slight. Most of them are unknown to me, but nearly all of them are much smaller 
than the present insect, and and the few that approach it in size have cariniform 
elytral interstices. 
Goyder Range, Hugh Ci’eek. 
BOLBOCERAS. 
B. septe7n-tuberculatum, Bainbr. 1 Alice Springs. The species to which I 
doubtfully attribute the example before me is known to me oidy by the de.scription 
(which is brief and not very clear) of its author, and by Westwood’s figure, which 
looks as if it might very possibly be founded on the female of the species of which 
this is the male. Nevertheless, I deem it more probable that this Central Austra¬ 
lian Bolhoceras is an undescribed one ; it could not, however, be prudently described 
without the knowledge of both sexes. 
TROX. 
T. hisig7iicollis, sp. nov. (1). Ovatus ; opacus; niger, indumento griseo-fusco 
vestitus ; capite ruguloso, carina arcuata in medio divisa instructo; clypeo antice 
angulato; prothorace quam longiori tertia parte latiori, postice in medio modice 
lobato, ut caput ruguloso, supra costis tuberculisque crassis imequali (costa 2^ minus 
determinata, in medio subinterrupta), lateribus leviter 3-sinuatis in medio angu- 
latis, angulis posticis rotundatis ; elytris seriatim sat crebre granulatis, granulis 
serierum alternarum minutis rotundis ceterarum sat magnis elongatis, seriebus 
5=^ 9^ que ad basin breviter costiformibus ; tibiis anticis extus in medio dente 
parvo instructo ; prosterno postice vix prominulo. Long. 6^ 1. Lat. 4 1. 
