collected in Australia and Tasmania. 350 
I have examined the type of Isopteron opatroides, 
Hope, aud it is inseparable from Cestrinus, Hr. Opatrum 
piceitarse, Hope, also belongs to the same genus. His 
definition, “ Tibiee anteriores dentate,” is incorrect and 
misleading : it, perhaps, refers to the subangular dilata- 
tion of the anterior tibise beneath—a male character of 
some of the members of the genus. As Hope did not 
describe his typical species of Isopteron till 1842 (and 
then under a different name to the one mentioned in the 
“ Manual”), it is not advisable to change Hrichson’s 
name. This genus really belongs to the group 
“‘ Pedinides,” and it should be placed near Blapstinus. 
Cestrinus trivialis. 
Cestrinus trivialis, Hr., loc. cit., p. 173; Lacord. Gen. 
Col., Atlas, t. 53, fig. 6. 
Cestrinus longus, Blanch., in Dumont d’Urville’s 
Voyage au Pole Sud, iv., Ins., p. 156, t. 40, fig. 14. 
Hab. Tasmania—Hobart, Launceston, George’s Bay. 
Originally described from Tasmania. The male has 
the anterior tibiee abruptly widened on the inner side 
from about the middle to the apex, and the basal joints 
of the anterior tarsi a little thickened. Jsopteron 
opatroides, Hope, is closely allied to this imsect, but 
differs from it in having ferruginous antenne and the 
elytral interstices granular. Opatrum piceitarse, Hope, 
is also very near C. trivialis, but it has the sides of the 
thorax less sinuous behind. 
Cestrinus aversus. 
Cestrinus aversus, Pasc., Ann. and Mag. Nat. Hist. (4), 
li., p. 278 
Cestrinus posticus, Pasc., loc. cit. 
Hab. Tasmania—Hobart. 
Numerous specimens; some with fully-developed, 
others with rudimentary wings. The anterior tibiz are 
simple in the male. ‘This and the preceding species 
occurred under stones not far from the sea-shore 
(Walker). 
