INTERNAL ANATOMY OF INSECTS. 147 
ing the insects } r ou take. Some of these scents are pe- 
culiar to particular parts or organs, and some are ex- 
haled generally by the whole body; some are emitted by 
a fluid secretion, and others are gaseous effluvia. On 
a former occasion I gave you a rather full account of 
these scents and their organs a ; I shall relate here only 
what I there omitted. To begin with sweet odours. 
Many beetles emit an agreeable scent. The rose-scent- 
ed Capricorn or musk-beetle (Cerambyx moschatus) has 
long been noted for the delicious scent of roses which it 
exhales ; this is so powerful as to fill a whole apartment, 
and the insect retains it long after its death. Captain 
Hancock also informed me that another species of the 
same genus, C. sericeus, has in a high degree a scent re- 
sembling that of the cedar b on which they feed. Though 
most of the micropterous tribes {Brachyptera) have a 
fetid smell, yet there are some exceptions to this amongst 
them. One species (Philonthus suaveolens K. MS.) re- 
lated to P. mica)is, which I once took, smelt precisely 
like a fine high-scented ripe pear; another, Oxytelus 
morsitans, like the water-lily; a third, O. rugosus, like 
water-cresses; and lastly, a fourth (P.fuscipes), like saf- 
fron : Trichius Eremita, one of the Petalocerous beetles, 
is stated to have the scent of Russia leather ; Geotrupes 
vernalis, in spite of its stercorarious food, of lavender- 
water d . Mr. Sheppard has observed that Dytiscus mar- 
ginalis when recently taken smells not unlike liquorice : 
Bonnet mentions a caterpillar that had the scent of 
new hay. A little gall-fly (Cynips Quercus Ramuli) has 
a Vol. II. p. 238-. III. p. 147—. 
b A Brazilian wood so called, but differing from the common cedar. 
Dotharding Insect. Coleopt. Dank. J Sturm Deutsch. Fit. i. 27. 
I ?. 
