40 6 Macfarlane. — Observations on Pitcher ed 
irregularly disposed among the long, delicate hairs of the 
latter. 
I have not been able in this genus to watch insect- 
movements, but from our knowledge of Sarracenia the 
arrangements are evident. Insects alighting on any part 
of the tube, or crawling up from the ground, are tempted 
by the secretion of the alluring glands to run about till they 
reach the orifice. Whether entering the pitcher by the 
involute rim with its honey-laden surface, or by the honeyed 
flap, the cincture of stiff hairs inside the former, and the 
stout hairs of the latter, will act as a considerable obstacle 
to their easy return. Thus inclined to step inside the orifice, 
the abundant honey and the coloured skylights will tend to 
allay their fear, even though treading among the hairs of the 
attractive surface, which further incline them to move down. 
The extreme smoothness of the ‘ conducting 5 cells and their 
fine down-growing apices will combine, as in Sarracenia , to 
afford no foothold, and eventually the prey will get entangled 
in the long hairs of the detentive surface. Drude 1 states 
that Darlingtonia is provided with honey-glands, hairs, and 
digestive glands as in Sarracenia , but I have found no trace 
of the last, and Zipperer 2 says ‘ Driisen sind auch hier keine 
vorhanden.’ The insects caught in our greenhouses are 
almost entirely bluebottles, but earwigs and wasps are occa- 
sionally found. The late Miss Owen informed me that in 
a leaf, grown and examined by her, a slug was found near the 
bottom of the tube in state of advanced decomposition. The 
contrivances therefore which prove so fatal to insects may 
be equally destructive to slugs. It would be highly interesting 
to know if in the home of Darlingtonia the same happens. 
Sarracenia. The different species of this genus exhibit 
some very interesting modifications both in general outline 
and histological arrangement. Hooker divides them under 
two heads : (i) those with the mouth open and lid erect, and 
which consequently receive the rain-water in greater or less 
1 Schenck’s Handbuch der Botanik, Bd. I. p. 120. 
2 Op. cit. , p. 26. 
