INTERNAL ANATOMY OF INSECTS. 147 



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 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 (Ceramlyx 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 oh 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. micans.) 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.fusci^)es\ like saf- 

 fron c : Trichius Eremita, one of the Petalocerous beetles, 

 is stated to have the scent of Russia leather ; Geotrupcs 

 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-. TIL p. 147-. 



b A Brazilian wood so called, but differing from the common cedar. 



c Dotharding Insect. Colcopt. Danic. d Sturm Deutsch. Fn, i. 27. 



