412 OBSERVATIONS ON INSECTS AND VERMES. 
NOSE-PLY. 
About the beginning of July, a species of fly (szsca) obtains, 
which proves very tormenting to horses, trying still to enter their 
nostrils and ears, and actually laying their eggs in the latter of 
those organs, or perhaps in both. When these abound, horses in 
woodland districts become very impatient at their work, continually 
tossing their heads, and rubbing their noses on each other, regard- 
less of the driver, so that accidents often ensue. In the heat of 
the day, men are often obliged to desist from ploughing. Saddle- 
horses are also very troublesome at such seasons. Country people 
call this insect the nose-fly. —WHITE. 
Is not this insect the Oestvus nasalis of Linnzeus, so well de- 
scribed by Mr. Clark in the third volume of the ‘“ Linnean 
Transactions,” under the name of Oestrus velerinus ?—MARKWICK. 
ICHNEUMON-ELY. 
I saw lately a small ichneumon-fly attack a spider much larger 
than itself on a grass walk. When the spider made any resistance, 
the ichneumon applied her tail to him, and stung him with great 
vehemence, so that he soon became dead and motionless. The 
ichneumon then running backward drew her prey very nimbly over 
the walk into the standing grass. This spider would be deposited in 
some hole where the ichneumon would lay some eggs ; and as soon 
as the eggs were hatched, the carcase would afford ready food for 
the maggots. 
Perhaps some eggs might be injected into the body of the spider, 
in the act of stincing. Some ichneumon deposit their eggs in the 
aurelia of moths and butterflies. —WHITE. 
In my “ Naturalist’s Calendar” for 1795, July 21st, I find the 
following note : 
It is not uncommon for some of the species of ichneumon-flies 
to deposit their eggs in the chrysalis of a’ butterfly ; some time ago 
I put two of the chrysales of a butterfly into a box, and covered it 
with gauze, to discover what species of butterfly they would 
produce; but instead of a butterfly, one of them produced a 
number of small ichneumon-ilies. . 
