MEMBRA OIBJE. 
229 
CERAON TUMESOENS. 
(Plate LI. figs. 1, la.) 
Colour dull ferruginous yellow or reddish testaceous. Pronotum darker. Supra- 
lmmerals broadly clavate by the front but blunt by the dorsal aspect. Posterior 
horn nearly straight and smooth. Tegmina dense, and not easily showing the 
venation, except by a mounting in Canada balsam. They then show the subdivision 
of the apical areas, by transverse veins. This is rather a large species with stout legs. 
Size, 11 x G mm. 
Habitat .—T as m a n ia. 
Heine Coll. 
CERAON CONTORTUM. 
(Plate LI. fig. 2.) 
Oxyrhachis contorta. 
Smaller than the last. Pronotum broad above the insertions of the tegmina, 
then sloping over the scutellum. The posterior horn rises from the dorsum, and is 
carried to the tips of the tegmina. Abdomen tumid, ochreous in colour, and ringed. 
Tegmina veined as in the former species. 
Size, 7x4. mm. 
Habitat .—Tasmania (?). 
From the B.M. Collection. 
Australian forms of Centrotidse may be expected to show certain differences from 
the Asiatic and African species. Though these differences are not greatly marked, 
they may be sufficient to allow of separation, and I group those below under a new 
genus, partly because their neuration is unlike that of the normal Centrotus, although 
some of the species have been usually placed as such. 
Genus : PTEPvOSTICTA, n.g. 
Pronotum with short divergent suprahumerals, slightly truncated when seen 
from the sides, but acute from the front aspect. Dorsal region smooth, arcuate, not 
sinuous at the margins, and ending in a tapering posterior process, as long as the tips 
of the tegmina. Tibiae rather stout, but not spatulate. Frons as in Centrotus, with a 
high metopidium. Tegmina hyaline, often pointed, with five unequal apical areas 
and two discoidals, but the neuration at the apices is cut and subdivided into small 
areas by numerous short transverse veins, so as to give a reticulated surface. The 
base of the costa and that of the clavus is densely spotted with semi-transparent 
pores like perforations. The clavus has two curved nervures. 
Species at present are confined to Australia. 
Plerosticta rubrilinea. I\ sjweta. P. rubridorsata. P. xantha. 
2 H 
