68 
THE FLORIST'S JOURNAL, 
stick should come, is made rough, to facilitate the entrance 
of the insects, while every other part of the interior, as well 
as the outside, is glazed. This prevents their return, after 
having once passed over the top of the inner cylinder; they 
are then taken by removing the stopper of the exterior mouth, 
and shaking them out. The advantage is apparent in the 
saving of trouble effected ; for with ordinary traps it is neces¬ 
sary to examine them every morning, or on the approach of 
night the destruction recommences, the insects returning again 
to feed on the plants beneath; but with this of Mr. Devonport 
it is not absolutely required to attend to them more than once 
or twice a week, as the glazed sides of the two funnels, which 
form the vacuity, utterly preclude the possibility of escape. 
The size of this trap is about that of a small (60) flower-pot; 
the form is artistical ; and if coloured green or some incon¬ 
spicuous colour, according to the situations they are required 
for, instead of white, as in the specimen sent, there is 
nothing about them to offend the discriminating eye of taste, 
and we are sure the Dahlia grower will receive them as a 
boon. 
LIST OF NEW PLANTS. 
CactacjeLe. — Polyandria Monogynia. 
Disocactus bifonnis. A singular little cactaceous plant, with smooth, round, 
woody stems, and fleshy oblong-lanceolate leaves from 2 to 3 inches long; 
the flowers are solitary, drooping, about 2 inches in length, of a deep pink 
colour, usually produced at the extremity of the two-years-old leaves. It 
is remarkable for the regularity in number with which the sepals and petals 
are produced; these are constantly four of each — while with Indian figs 
in general the arrangement of these parts is extremely uncertain and va¬ 
rious. This feature has suggested the idea of founding a new genus, of 
which the present subject is the type. It was introduced by G. U. Skinner, 
Esq., from Honduras, in 1839. In cultivation the plant requires a warm 
greenhouse and the usual treatment of such plants; it is an abundant 
bloomer, and is equally interesting in the autumn, when covered with 
its crimson fruit. — Bot. Reg. 9—45. 
Berberace.®. —Hexandria Monogynia. 
Berberis trifoliata. This very rare and beautiful species was found in 
Mexico, by Mr. Hartweg, near the Hacienda del Espiritu Santo, on the 
road from Zacatecas to San Luis de Potosi, an immense plain, occupied 
chiefly by Opuntias, stunted plants of Prosopis dulcis, and Yuccas. It 
covered large tracts of country ; the people call it Acrito. Its sessile, ternate, 
holly-like leaflets, beautifully marbled with pale blue and dull green, are 
entirely different from any thing among the pinnated Berberries hitherto 
