INTERNAL ANATOMY OF INSECTS. 14] 
ing the insects you 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; I shall relate here only 
what I there omitted. To begin with sweet odours. Many 
beetles emit an agreeable scent. The rose-scented Ca- 
pricorn or musk- beetle (Callichroma moschatum) has long 
been noted for the delicious scent of roses which it ex- 
hales; 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, Cullichroma sericeum, has in a high degree 
a scent resembling that of the cedar® on which they feed. 
Though most of the micropterous tribes (Staphylinus L.) 
have a fetid smell, yet there are some exceptions to this 
amongst them. One species (S. swaveolens K. M.S.) re- 
lated to S. micans Grav., which I once took, smelt pre- 
cisely like a fine high-scented ripe pear; another, Ozy- 
telus morsitans, like the water-lily ; a third, O. rugosus, 
like water-cresses; and lastly, a fourth (S. fusczpes), like 
saffron’: Trichius Eremita, one of the Lamellicorns, is 
stated to have the scent of Russia leather ; Geotrupes ver- 
nalis, in spite of its stercorarious food, of lavender-wa- 
ter’. Mr. Sheppard has observed that Dytiscus margi- 
nalis when recently taken smells not unlike liquorice: 
Bonnet mentions a caterpillar that had the scent of new 
Vor. Il. p. 241—. TIT. p. 148—. 
» A Brazilian wood so called, but differing from the connnon cedar. 
© Dotharding Insect. Coleopt. Danic. 
4 Sturm Deutsch. Fn. 1. 27. 
