WEEKLY ENTOMOLOGIST. 
“ ENTOMA QUIDQUID AGUNT NOSXRI EST FARRAGO LIBELLI.” 
No. 11.] SATURDAY, OCTOBER 25, 1862. [Price 2d. 
EUPITHECIJE . 
i® no genus in which 
the researches of modern Ento- 
mologists have more evidently pro- 
duced fruit than Eupithecia. Perhaps 
the general advance of Entomology is 
more strikingly exemplified in the 
progress of knowledge of such genera 
as Gelechia, Coleopliora , Lithocolletis 
and Nepticula, — which require the 
aid of the microscope to study their 
history, — than in most others, but 
still, great as is the revolution there, 
it is equalled in extent, if not in the 
magnitude of the difficulties attending 
it,»by that which has taken place in 
the genus Eupithecia. 
The reason of this change is easily 
found when we consider that, for 
several years past, the special atten- 
tion of two of our best Entomologists 
has been devoted to effect it. Al- 
though their names have not been 
perpetuated by the nomenclature of 
insects, they will not be forgotten in 
connexion with this interesting genus, 
even when their labours are over, and 
their discoveries perfected in after 
years. 
This is not, however, the sole cause 
of tire revolution. The species allu- 
ded to are now universal favorites. 
Of course where master minds lead 
the way, plenty of followers will be 
found, who are anxious to be “ in at 
the death.” 
Other circumstances still, however, 
favour this group. Its habits are not 
yet well investigated, and it presents 
considerable difficulty to the student 
from its retired character, and general 
obscurity and extent. Thus, the 
Entomologist, by studying it, may 
find something that presents agreable 
difficulties to be overcome, without 
requiring that he should attempt the 
serious undertaking of “going into” 
the Tineas. It is an easy way of satis- 
fying one’s conscience. 
This week we record the discovery 
at York of four species of Eupithecia 
new to the district,' — a fact which 
will, we hope, put all our readers on 
the “ qui vive,” in their own locali- 
ties. Probably most of them know 
how to obtain these small Geometrce , 
and only want the energy necessary, 
but some, and perhaps those who 
have the largest supply of energy, are 
in the stage of incipiency and know 
not how to go to work. Those who 
have only taken Eupithecia by the 
ordinary methods of indiscriminate 
