y of _Curculionidae_ has long
been an especial study. One of these insects M. Jekel has identified
with a species of wide distribution; the other proving undescribed, he
has drawn up a description of it, which, accompanied by a figure, I have
the honour to lay before the Linnean Society. To this, I venture to add
a few observations upon the productions to which I have alluded.

The first of these is _Trehala_ or _Tricala_, under which name it formed
part of the Collection of Materia Medica sent by M. Della Sudda, of
Constantinople, to the Paris Exhibition of 1855, and since deposited in
the Ecole de Pharmacie in Paris.

_Trehala_ (fig. 2) consists of cocoons of an ovoid or globular form,
about 3/4 of an inch in length; their inner surface is composed of a
smooth, hard, dusky layer, external to which is a thick, rough,
tuberculated coating of a greyish-white colour and earthy appearance.
Some of the cocoons have attached to them the remains of the tomentose
stalk of the plant upon which they were formed; others have portions of
a tomentose spiny leaf built into them; and, more rarely, one finds
portions of the flowering heads of the plant, a species of _Echinops_,
similarly enclosed. Many of the cocoons are open at one end and empty;
others have a longitudinal aperture, originally closed by the stalk of
the plant, and still contain the insect; a few are entirely closed.
Specimens of this insect, extracted from the cocoons sent to Paris, were
examined in 1856 by my friend Mr. W. Wilson Saunders, who pronounced
them to be _Larinus maculatus_ of Faldermann,--a determination also
arrived at by M. Jekel from specimens presented by Mr. Loftus to the
British Museum. Respecting these latter, one of which is represented in
fig. 1, M. Jekel makes the following remarks:--

"LARINUS MACULATUS, _Faldermann, Faun. Transcauc._ ii. p. 228, 449,
tab. 6. f. 10, et iii. p. 198.--_Schoenh. Gen. et Sp. Curcul._ iii.
p. 112 et vii. 2. p. 7.--_Hochhuth, Bull. Moscou_, 1847, No. 2. p.
538 (var. [Greek: gamma]).

"Var. [Greek: gamma]. _Larin. Onopordinis_, Sch. _loc. cit._ iii. p.
111 (excl. synon.).

"Of this species, Mr. Loftus captured several specimens, all of
small size: from some of them the pollinosity had been rubbed off,
as is represented in the figure by Mr. Ford (_vide_ fig. 1), which
shows only a part of the inferior layer of tomentum and the greyish
ground of the dorsal and lateral ma