THE SUBSTITUTE. 
167 
ttunate than' my predecessors. 
(Vol. Xt p. 234.) 
Grammesia. 
Mr. Stephens has separated this 
j genus from the ancient genus 
iCaradrina, and M. Duponchel 
lhas imitated him. I now think 
I that they are right, and that its 
c characters are well marked. The 
1 larvae still more onisciforin than 
1 those of Caradrina; the antennae, 
1 the palpi, &c., appear to me to 
I render the separation necessary. 
The genus Grammesia is re- 
I duced to a single species, for the 
I bilinea which has been tried to 
Ibe separated from it is only a 
variety. ;(Vol. 1., p. 235.) 
Hydrilla. 
I have preserved for this genus 
I the name Hydrilla, which M. 
Boisduval gave to it, but I have 
. at the same time considerably 
I modified the genus. In fact there 
lis great difference between his H. 
ipalnslris and ohlilerala, and his 
H. caliginosa and aguatilis, and 
1 lastly his II. uliginosa appears to 
I me a true Caradrina of the group 
ioilenia.' 
The genus Hydrilla thus re- 
I duced is one of the mostabnormal 
I of all the neighbouring families. 
That which is particularly remark- 
able is the difference of the sexes: 
one may say without exaggeration 
I that it is in the Nocture the ana- 
llogue of Chemerina in the Geome- 
try, and Diumea in the Tineidcc; 
■ so dissimilar is the female to 
tthe male in shape and form, one 
■would take it for a dwarfed speci- 
men. 
The species of Hydrilla are not 
I numerous, and generally rare. 
(One only was known to ancient 
authors. Of their transformations 
we only know what Treitschke 
says : their manners appear to be 
quite similar to those of Cara- 
drina : they enclose themselves in 
autumn in earthen cocoons, where 
they pass the winter in the larva 
state, and do not change to chry- 
salis till the spring. It is said 
they are very difficult to rear in 
confinement. (Vol. I., p. 237.) 
[To be continued.] 
rjiHE ENTOMOLOGIST’S 
X COMPANION. 
By H. T. Stainton. 
Contents. 
Hotv to catch Micro-Lepidop- 
tera. 
Where to catch Micro-Lepidop- 
tera. 
When to catch Micro-Lepidop- 
tera. 
To collect the Larva of Micro- 
Lepidoplera. 
Table of appearance of British 
Tineina. • * 
Calendar of British Tineina 
appearing in tho Imago state. 
On the Habits of Tineina 
Larva. 
Calendar of British Tineina 
appearing in the Larva or Pupa 
state. 
How to rear Micro-Lepidoptera 
from the Larva. 
How to kill Micro-Lepidoptera. 
How to set Miero-Lepidoptera. 
Entomological localities. 
Ten Days at Kilmim, with a 
Trip to the Isle of Arran. 
On the necessity of the Col- 
lector keeping a Journal. 
Journal of a Larva Collector in 
1853. 
John Van Voorst, I, Paternos- 
ter PiOW. 
