236 Mr. F.P. Pascoe on some new Australian Longicornia. 
(D. obliqua), but differs in the form of the prothorax and the absence 
of the lateral spines; the dilated joints of the antenne also are cha- 
racteristic, although there is a sharpness on one side in Didymocantha 
that marks an approach to the same structure. 
Opsidota infecta. (Pl. XI. fig. 6.) 
O. fusca, nitida, disperse griseo hirta; elytris obsolete flavo plagiatis. 
Hab. South Australia. 
Dark brown, shining ; head as broad as the prothorax, with a sharply 
impressed frontal line, the eye occupying the whole side of the head, 
and somewhat approximating on the vertex; prothorax not longer than 
broad, the apex and base equal in breadth, very rugosely punctured with 
scattered, stiff, greyish hairs, which are rather more densely placed on 
the centre and sides, so as to form five spots; scutellum slightly rounded 
behind ; elytra about twice the length of the head and thorax together, 
much broader than the latter, covered with large irregular punctures, 
with stiff, scattered, decumbent greyish hairs and a few nearly obsolete 
yellow blotches, the apex with a short sutural spine ; body beneath and 
legs dark brown, with greyish hairs; antennz dull brown. Length 
7-9 lines. 
TapHos. 
Caput subexsertum, antice brevissimum, tuberis antenniferis distantibus. 
Oculi majusculi, intus lunulati. Antenne 11-articulat, corpore lon- 
giores, glabree, scapo brevi, obconico, articulo secundo brevissimo, ceeteris 
compressis, subzequalibus, apice lateraliter productis, ultimo emarginato. 
Palpi incrassati. Mazille lobo externo producto, fimbriato. Prothorax 
capite latior, eequatus, lateraliter dentatus. E/ytra late depressa, apice 
rotundata. Pedes mediocres. Coxe antice distantes, globose, haud 
exsertee. Femora simplicia. Tars? postici articulo basali elongato- 
triangulari. Prosternum elevatum. Mesosternum latum, declive. Ace- 
tabula antica anguste angulata. 
The single specimen from which I have drawn up this description 
appears to be a female. If I am right in referring it to the neigh- 
bourhood of Cerambya notwithstanding its broad depressed body, 
the antenne of the other sex will prove to be somewhat different, 
probably longer and less compressed. I feel, however, some difficulty 
about its location, the form of the head, antenne, and simple femora 
pointing to Cerambyx ; but it differs remarkably from it in habit, in 
this respect bearing considerable resemblance to a Prionid. 
Taphos aterrimus. (Pl. XI. fig. 7.) 
T. ater, nitidus, glaber. 
Hab. South Australia. 
Deep glossy black, without pubescence; head sparingly punctured, 
