62 
derm, which, on the removal of the pilosity is seen to be very 
distinctly punctured, and to have two nitid levigate stripes 
placed in the form of a cross. The elytra are gradually narrowed 
to almost a point at the apex, and are very strongly incurved 
laterally ; on each of them are four feeble costz (besides the 
lateral margin and suture) of which that nearest to the suture is 
somewhat widely separated from the latter at the base, but 
gradually approaches it hindward to about the middle of the 
elytra, whence to the apex (or nearly so) it runs parallel to the 
suture. 
S. Australia ; basin of Lake Eyre. 
A. niger, sp. nov. Niger; supra pube subtili fulva vix conspicua, 
subtus et anguste - in elytrorum marginibus pilis griseis sat 
dense positis vestitus ; prothorace ‘transversim crassissime 
rugato, quam latiori fere longiori, antice quam postice sat 
angustiori, lateribus a margine antico retrorsum divergenti- 
bus (in medio subangulatis, hinc retrorsum convergentibus, 
juxta basin retrorsum divergentibus), angulis posticis 
extrorsum sat prominulis; elytris externe leviter emarginatis, 
apice angustatis, fere ut przcedentis sculpturatis sed costa 
1* paullo pone basin suture conjuncta; antennis fere ut 
precedentis sed nigre. Long., 83—9 1.; lat., 14 1. 
A very distinct species. 
W. Australia; near Eucla. 
LYGESIS. 
It is impossible, I think, in many instances to feel any confid- 
ence in determinations arrived at from a study of Mr. Pascoe’s 
work on the Longicorns. This genus furnishes a case in point. 
Mr. Pascoe originally confused it with Didymocantha, whose 
species, as M. Lacordaire remarks, are “very different insects,” 
but subsequently formed a new genus for it and others under the 
name Isalium. Later still Mr. Pascoe discovered that some 
members at least of his Zsalium were attributable to a genus long 
before characterised by the Rev. F. W. Hope under the name 
Strongylurus ; so Isaliwm was dropped; and then finally, on 
further reconsideration still, the author arrived at the conclusion 
that one of the species originally published as a Didymocantha 
was neither a Didymocantha nor a Strongylurus,; and so another 
new name (Lygesis) was proposed, with a very brief diagnosis, 
merely mentioning a few characters in which Lygesis differs from 
yet another new allied genus characterised at the same time. If 
one turns to the description of the typical species of Lygesis for 
more information, one finds a description of extreme brevity, in 
which there is actually no mention whatever of the puncturation 
of the insect. 
EE Ee 
