37 
with the Aphodiides, from N. W. Australia, described by Sir W. 
Macleay, and find it quite distinct from them all. 
N. Territory of 8. Australia. 
PROCTAMMODES (gen. nov.). 
I propose this name as a substitute for Proctophanes, Har. 
(1861), the name Proctophana having been previously proposed 
by Lacordaire (1848) for a genus of Clythrides. I cannot find 
that this dowble emploi has been as yet corrected. 
TROX. 
T. Elderi, sp. nov. Latissimus; minus convexus; subnitidus ; 
niger ; capite crebre fortiter punctulato, haud tuberculato ; 
prothorace quam longiori tribus partibus latiori, postice 
lobato, supra costis tuberculisque angustis inequali (inter- 
stitiis planis in medio punctulatis latera versus granulatis), 
postice quam antice tribus partibus latiori, angulis posticis 
rectis, lateribus crenulatis; elytris confuse minus crebre 
granulatis et tuberculorum magnorum obtusorum seriebus 3 
ornatis, lateribus leviter crenulatis; tibiis anticis extus 4- 
vel 5-dentatis, dente apicali plus minusve bifido. Long., 12 1.; 
lat., 8 1. 
Differs from 7’. Castelnaui, Lansb., inter alia by the non-dentate 
. lateral margins of its elytra; from 7’. Dohrni, Har., and T. gigas, 
Har., by its non-tuberculate head, &c. ; from all three by its very 
wide and somewhat depressed form, and the numerous teeth on 
the margin of the front tibiz ; also differs from 7’. Dohrna and 
Castelnaut by the slenderness of the costz and tubercles of its 
prothorax, which appear as linear elevations placed on a flat 
surface, and separated from each other by spaces at least two or 
three times as wide as each costa. 
South Australia; taken by Professor Tate near Ooldea; also 
in the same region by Mr. Helms, of the Elder Exploration 
party. 
T. gigas, Har. The commonest of the large species of Tox, 
which Dr. Sharp tells me is identical with the species labelled 
T. gigas in the British Museum, does not agree at all satisfac- 
torily with the description of that species, from which it differs 
as follows :—The head is not bituberculate, but has a single 
transverse scarcely defined prominence at the base of the clypeus; 
the tubercles and costz of the prothorax are not “angustuli,” but 
are as wide as they can well be, there being no flat space at all 
between one and another of them ; on the elytra the external (not 
the middle) row of tubercles is the shortest. In other respects 
this insect agrees with the description. I propose to call this 
form 7’. Tater (? = gigas, var.). 
