1872.) 269 
M. palmatus, Er., according to M. Brisout, is the ¢ of obscurus, Er., which 
name he employs. It occurs on Teucrium scorodonia, Mentha aquatica, and Cyno- 
glossum officinale. He does not recognise M. distinctus ; to which, as it is described 
as ‘‘ moderately shining,” and as equalling small erythropus in size, I think our 
common palmated species cannot be correctly referred; indeed, having read Mr. 
G. R. Waterhouse’s notes of his comparison of British types with Erichson’s own 
specimens at Berlin, and having also carefully examined those types, I have little 
or no doubt that the males of our insect are palmatus and the females obscurus. 
M. bidentatus, on Lotus. 
MV. erythropus and M. ewilis, on Papilionacee. 
WV. solidus, on Genista and Lotus. 
My M. pictus, according to M. Brisout, is the M. mutabilis of Rosenhauer 
(Thier. Andalus., 1856, p. 102), hitherto only recorded from Algeria, Spain, and 
Provence,—localities not much in accord with the north-eastern coast of Yorkshire. 
M. mutabilis is sometimes entirely black, whereas all of the numerous specimens of 
M. pictus that I have seen have a red spot on each elytron; but, as I have myself 
supplied M. Brisout with specimens of my insect, there can be no doubt of his 
knowledge on that point.—E. C. Ryw, 10, Lower Park Field, Putney, S.W.: 
March, 1872. 
Note on Pogonus littoralis.—M. le baron M. de Chaudoir, in his recent ‘ Essai 
monographique sur le groupe des Pogonides,” in the Annales de la Soc..Ent. de 
Belgique, xiv, p. 26, after pointing out that the true P. littoralis of Dejean is only 
found in the south of France, Algeria, Dalmatia, and near Odessa (and that 
presumably it is to be found in Spain, Italy, and Greece), remarks that Dawson’s 
littoralis is probably only a large variety of P. chalcews, as the shape of the thorax 
and the laterally effaced striae of the elytra mentioned by the English author do 
not fit the true littoralis. The only variations of chalceus mentioned by Chaudoir 
are in size (not relative length of thorax and elytra), the more or less rotundity 
of the sides of the thorax, and coloration; consequently the salient diagnostic 
characteristics of Dawson’s insect remain unaccounted for: but it should be also 
remarked that the latter (Geod. Brit., 71) notices other particulars referred to by 
Dejean, upon which he states that little reliance is to be placed; thus leaving room 
for the suspicion that his insect is not identical with Dejean’s.—Ib. 
Note on the larva-case, Sc., of Clythra 4-punctata,—Prof. Westwood, in his 
excellent ‘Introduction,’ informs us, on the authority of M. Wandouer, and of a 
statement in Fuessly’s ‘ Archives,’ that “the larvae of the genus Clythra inhabit 
hairy cases.” This statement I find is inapplicable to the case of C. 4-punctata, 
which I found in numbers in the nest of the Scottish wood-ant (Formica congerens ?) 
during a short visit to Braemar in May last. Besides being destitute of hairs, it 
differs considerably in structure from that figured at p. 383 of vol. i of the 
‘Introduction’ as belonging to C. 3-cuspidata. It agrees with it.in being pear- 
shaped and open at the narrow end; but, in addition, affords an interesting 
illustration of how strength may be imparted to a structure at the smallest cost 
of material with the least additional weight. 
From the upper side of the mouth, which is slightly bent downwards, and at 
