8G 
THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
at the rate of 2 d. an oz.; but only one 
can be sent in a single cover. 
The rate of postage for book packets 
to India, Ceylon and to Hong Kong ( vid 
Southampton) is four times the home 
rate; that is, 4 d. for 4 oz., Is. 4d. for 
1 ft. 
Of course, in all cases, a book packet 
must be open at the ends, and the 
postage must always be prepaid. 
ENTOMOLOGY IN AMERICA. 
A letter, recently received, from our 
transatlantic correspondent, Dr. Clemens, 
contains so much valuable information 
on the Micro-Lepidoptera of Pennsyl- 
vania that we deem it advisable to pub- 
lish nearly the whole of it. 
There is such a thoroughness and 
painstakingness about Dr. Clemens’ ob- 
servations that we have the most san- 
guine expectations of his future ento- 
mological career, and his lately pub- 
lished ‘ Synopsis of North American 
Sphingidre ’ will be read with great 
interest for the valuable philosophical 
disquisitions contained in the intro- 
ductory portion of the treatise. 
Easton, Pennsylvania, U.S., 
October 10, 1859. 
My dear Sir, — I had the pleasure to 
send you, by last week’s steamer, a little 
box containing a few of the cocoons of 
some of our Micros. 1 hope you will 
receive them safely, and that their con- 
finement and transatlantic voyage may 
not injure the pupa;. Should the pupae 
of this lot produce imagos, 1 will gladly 
scud you others hereafter. This I can 
easily do, probably during the summer, 
as but ten days will expire before they 
reach you, and my observations during 
the last and the present summer have 
put me in posssession of the history of 
many larvae. Some of them are very 
troublesome to rear, and in many in- 
stances I have been entirely unsuccessful 
in carrying them through their trans- 
formations. One species which I found 
this season, for the first time, iu abund- 
ance, all, I believe, died in the larva 
state, notwithstanding the assiduous at- 
tention I gave it, and all my devices 
contrived for its benefit. I will not 
trouble you to read the particulars of its 
history — unfortunate history, I should 
say — at the present time. 
******* 
My first paper on the Tineina will 
appear, sometime during this month, in 
the ‘ Proceedings of the Academy of 
Natural Sciences;’ iu it I describe four 
genera, and give figures of the heads, 
wings, &c., like those in your ‘ Insecta 
Britannica.’ I know nothing of the 
primary states of two of these genera, 
and as the perfect insects are quite 
distinct in their characters from any 
genus described in your work, I have 
pronounced them to be new. The plan 
on which the publication of the ‘ Pro- 
ceedings ’ is conducted does not include 
illustration, except at the expense of 
the author ; therefore I will not continue 
these papers with plates beyond another 
number or two in the * Proceedings,’ and 
if I cannot induce Professor Henry, of 
the Smithsonian Institution, to continue 
them as I work up the material in 
my collection, I will cease to publish 
them. 
******* 
One of the most interesting species 
amongst the cocoons I scut to you will 
