THE ENTOMOLOGIST. 215 
interior was completely destroyed. The metamorphosis took 
place inside the nut. Mr. M‘Lachlan, in connexion with the 
above, exhibited another species of palm (Copernicia conifera) 
from Rio Janeiro, forwarded to him by Professor Dyer, which 
were also infested with a species of Caryoborus (C. bactris, 
Linn.). In this case each nut served as food for a single larva 
only, which bored in ita cylindrical hole of considerable size 
and depth. 
Fungus on Insects.—The President exhibited the larva of 
an Australian species of Hepialus (he believed from Queens- 
land), bearing a fungus with four or five different branches 
issuing from the back of the neck and the tail. Also a fungus 
growing from the back of a Noctua pupa. 
Mimicry in South African Insects.—Mr. M‘Lachlan, on 
behalf of Dr. Atherston, of South Africa, exhibited a pair of 
very singular Orthopterous insects (belonging to the Acry- 
diide), which, in colour and in the granulated texture, so 
exactly mimicked the sand of the district as to render it 
almost impossible to detect it when in a quiescent state. 
The name of the insect was uncertain, but it was supposed to 
approach the Trachyptera scutellaris, Walker. Also some 
singular oval, flattened cases, open at each end, and from six to 
eight lines in length, formed of silk, to which was externally 
fixed a quantity of fine light brown sand. The cases were 
found under stones in sandy districts, and were stated by Mr. 
Charles O. Waterhouse to belong to a beetle of the genus 
Paralichas (one of the Dascillide). Also the cases of a 
species of Oiketicus of peculiar structure: the inner lining of 
the tube was, as usual, composed of toughened silk; but to 
this was attached, externally, a quantity of fine sand, and 
outside this a number of small angular pebbles, only the 
tail-end bearing a few rather long twigs and species of grass- 
stems. Thus the cases differed from those of most species in 
which substances exclusively vegetable were attached exter- 
nally, the addition of the pebbles making the cases (which 
were nearly two inches in length) unusually heavy. 
Singular Forms of Coleopterous Insects —The President 
read descriptions and exhibited drawings of two very singular 
forms of Coleopterous insects from Mr. A. R. Wallace’s 
private collection. For the first, which belonged to the 
family Telephoridw, he proposed the generic term Astychina, 
remarkable for the form of the two terminal joints of the 
