THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
93 
lliis season I have captured upwards of 
200 specimens of TIujalira Balis, in per- 
fect condition. I have also larvre of 
Eiiholia Cervinata to e.xchange. Those 
in want should write first. — G. Lumb, 
Kirhgale, Wakefield ; June 18. 
Larva or Eggs tuanled. — I shall feel 
much obliged to any one who will send 
me eggs or larvae of the following in- 
sects: — 
C. Dominula, 
P. Urticas, 
O. Coryli, 
P. Populi, 
P. Hamula, 
C. Furcula, 
Bifida' 
Vinula, 
P. Palpina, 
N. Cucullina, 
Carmelita, 
Dictaea, 
Dictaeoides, 
Trepida, 
Chaouia, 
Dodonaea, 
and will endeavour to make a suitable 
return. — R ev. E. Hokton, Wick, Wor- 
cester; June 16. 
NATURAL HISTORY OF THE 
TINEINA. 
Depressabia Appl.ana. 
The egg of this species is deposited in 
spring by the hybernated female. The 
larva feeds on the leaves of various species 
of Umbelliferce ; it is very partial to 
Anthriscus sylvestris, but may also be 
found ou Heraclium Sphondylium, Chce- 
rophyllum lemulenlum, Torilis Anthriscus, 
QUnanthe Crocata, Angelica sylvestris, 
&c. It inhabits the tip of a leaf, of 
which it draws the two sides together, so 
as to form a tubular habitation, in which 
it constantly resides when not actually 
employed in eating. The larva readily 
takes alarm on any agitation of the plant, 
and then hurriedly descends to the ground, 
whence it happens that the empty tubes 
are sometimes disproportionately abun- 
dant, each panic involving the necessity 
of constrnciing a fresh habitation. The 
larva; may be found from the end of May 
to the middle of July, but towards the 
beginning of the latter month they are 
generally full-fed, and, quitting the plant, 
construct a slight cocoon amongst leaves 
on the surface of the earth, and there 
undergo their transformation to the pupa- 
state. In about three weeks the perfect 
insect makes its appearance, and, though 
no rarity in the autumnal months, is seen 
far more plentifully in the mouths of 
March and April. 
H. T. Stainton. 
ON THE FERTILIZATION OF BRITISH 
ORCHIDS BY INSECT AGENCY. 
BY C. DARWIN, ESQ., F.B.S. 
(Heprinied from the ' Gardener's Chronicle ‘ of 
J une 9, 1860.) 
I SHOULD be extremely obliged to 
any person living where the Bee or Fly 
Orchis is tolerably common, if he will 
have the kindness to make a few simple 
observations on their manner of fertiliza- 
tion. To render the subject clear to those 
who know nothing of Botany, I must 
briefly describe what takes place in our 
common British Orchids. 
The pollen-grains form two pear- 
shaped masses; each borne on a foot- 
stalk with a sticky gland at the end. 
The pollen-masses are hidden in little 
pouches open in front. When an insect 
visits a flower it almost necessarily, owing 
to the position of the parts, uncovers and 
touches the sticky glands. These firmly 
adhere to the head or body of the insect, 
