believe (including myself), have followed him. Mr. Waterhouse 
passes on to express the opinion that N. porcata, Spin. = 
“N. Marstersii, Casteln.” (which I take to be an erroneous render- 
ing of the name WMastersii, Macl.”), but this I think very 
doubtful, inasmuch as the Tasmanian species that seems fairly 
certainly to be Spinola’s porcata has never occurred to me in (or 
found a place in any collection I have seen from) any locality 
North of Victoria, and Macleay’s insect was taken at Gayndah 
in Queensland. The description of Mastersii is quite insufficient 
for identification unless one had a specimen from Gayndah to 
compare with it. 
In Trans. Roy. Soc. 8.A., 1890, p. 125, I described a 
species as WV. fasciata, from Southern Australia, which is 
really very close to the Tasmanian one that Spinola called 
poreata, and distinguished it especially by three characters,— 
—the form of the prothorax, the carination of the elytral inter- 
stices, and the puncturation of the ventral segments. Since I 
described NV. fasciata I have had the opportunity of examining a 
considerable number of Natales from all parts of Australia and 
have found that the prothoracic distinctions referred to are not 
very reliable inasmuch as the males of Natalis seem always to 
have their prothorax more elongate than the females, with its 
posterior dilatation more conspicuous. Nor is the carination of 
the elytra an altogether satisfactory character, for although 
in a series of examples of /fasciata the alternate interstices 
are evidently more distinct from the other interstices than 
they are in the Tasmanian insect, yet undoubtedly there is a 
certain variability in the degree of their prominence in both 
species. But the very wide difference in the puncturation of the 
ventral segments furnishes a perfectly satisfactory distinction 
between fasciata and the Tasmanian insect, and I notice another 
character (indicated in the Latin diagnosis of my description but 
not sufficiently emphasised) in the evidently longer and more 
slender hind femora of the latter. 
In the male of WV. fasczata the middle part of the second and 
third ventral segments bears close asperate fine puncturation 
(among which a good many evidently larger punctures are inter- 
mingled) and the fifth ventral segment is widely and roundly 
emarginate at the apex ; while in the same sex of porcata, Spin. 
(for which I propose the name planipennis), both the finer and 
less fine punctures are much less close than in fasciata and are 
evenly distributed over the segments, the fifth of which is 
truncate at the apex. 
In the female of both these species the puncturation is evenly 
distributed over the ventral segments, but in planipennis the 
less fine punctures are evidently less numerous than in fasciata ;. 
and in both the fifth ventral segment is widely obtuse at its apex. 
Cc 
