150 Scientific Intelligence. (Fes. 
perceptible to the eye and the touch; and although it may be 
sometimes not discoverable by either, yet the sensation of sweet- 
ness is readily perceived on applying the tongue to this portion 
of surface. In warm and dry weather, it becomes inspissated, 
resembling a whitish membrane. The falling of the insect as 
soon as it enters the tube is wholly attributable to the downward 
or inverted position of the hairs of the internal surface of the 
leaf. At the bottom of a tube split open, the hairs are plainly 
discernible pointing downwards ; and as the eye ranges upwards, 
they become gradually shorter and attenuated, till at, or just 
below, the surface covered with the bait, they are no longer per- 
ceptible to the naked eye, nor to the most delicate touch. It is 
here that the fly cannot take a hold sufficiently strong, but falls. 
The putrid masses of insects collected in the leaves of these 
plants, probably serve some purpose beneficial to the growth of 
the vegetable ; but what that purpose is would not be an easy 
task to conjecture. 
; XII. British Species of Roses. 
It appears from a paper by Mr. Joseph Woods, in the 12th 
volume of the Linnean Transactions, p. 159, that the indigenous 
British species of roses amount to 26. The following are the 
names of these species as given by Mr. Woods. 
1. Rosa cinnamomea. Found near Pontefract. 
2. rubella. Northumberland and Scotland. 
3. —— spinosissima. 
_ 4. —— involuta. Arran and west of Scotland. 
5. —— doniana. Found by Mr. G. Don on the mountains 
of Clova. 
6. —— gracilis. Villosa of English Botany. Darlington. 
7. —— Sabini. Near Dunkeld. 
8. —— villosa. Mollis of English Botany. Near Edinburgh. 
9. —— scabriuscula. Northumberland and Scotland. 
10. —— heterophylla. Near Edinburgh, 
11. —— pulchella. Ingleton, Yorkshire. 
12. ———_ tomentosa. 
13. —— nuda. Near Ambleside, Westmoreland, 
14. —— Eglanteria. Rubiginosa of English Botany. Kent, 
15. —— micrantha. 
16. —— Borreri. Near Edinburgh. 
17. —— cesia. Argyleshire. 
18. —— sarmentacea. 
19. —— bractensis, Ulverton, Lancashire 
20. —— dumetorum. 
21. —— collina. 
22. —— hibernica. In Ireland. 
23. —— canina. 
24. —— surculosa. Sussex and Kent. 
25, ——— systilla. Collina of English Botany, 
26. —— arvensis. 
