45 
On the Exclusion of the House-fly. 
que cornu elevato, apice subtrilobo, subtus excavato, piloso ; 
corpore subtus sparsim subpiloso, pedibus nigricantibus. 
Habitat in Insula Sancti Vincentii. 
In Museo Dom. Hope. 
Obs. — This insect was first sent to England by the late Rev. 
Lansdown Guilding, whose unwearied researches in every branch 
of zoology, I regret to state, have not as yet been sufficiently esti- 
mated by his countrymen. 
IX. Observations and Experiments for excluding the House 
and other Flies from Apartments, by means of Nets. B\ / 
the Rev. E. Stanley, now Lord Bishop of Norwich. 
Communicated by Colonel Sykes. 
[Read April 4, 1836.] 
In a paper read on April 7, 1834, at a meeting of the Entomolo- 
gical Society, by William Spence, Esq., on the Italian mode of ex- 
cluding the house-fly, some doubts seemed to be entertained as to 
the correctness of the facts, and the attention of observers was re- 
quested to so singular a discovery. In the course of the last sum- 
mer I accordingly had some nets prepared of different coloured 
worsteds, red, yellow, &c., the size of the meshes varying from £ 
to one inch on the side of the square. These were stretched over 
the two windows of the room in which I constantly sat in the 
morning, much exposed to the troublesome intrusion of flies, par- 
ticularly that most annoying species, the blue-bottle (Musca vomito- 
ria), attracted to the spot by a trellis covered with the sweet-scented 
clematis, honey-suckles, and other flowering plants. So great 
indeed was the annoyance occasioned by the numbers buzzing 
about the room, that on the hottest days I was obliged to forego 
the luxury of admitting the air, by even partially raising the 
saches. But no sooner had I set my nets, than I was relieved from 
my disagreeable visitors. I could perceive and hear them hovering 
on the other side of my barriers ; but though they now and then 
settled on the meshes, I do not recollect a single instance of one 
venturing to cross the boundary. To convince myself that this 
disinclination on their part was not accidental, depending on the 
state of the air or mere caprice, I repeatedly withdrew one of the 
