274 [May, 
our other Seydment by the apical joint of their maxillary palpi being scarcely visible, 
conic, and broad at the base (in fact, merged in the sub-apical joint), instead of 
slender and distinct.—K. C. Ryz, 10, Lower Park Fields, Putney, S.W., April, 1871. 
Note on a species of Corticaria new to the British lists—Mr. Champion has also 
recently taken, under dry bark, in Richmond Park, an example of a Corticaria | 
decidedly new to our list, and of which I have myself been so lucky as to find a 
pair in another part of the same Park, under similar conditions. As in the case of 
S. rufus, a visit to both localities by Mr. Champion and myself in company has 
failed to produce further specimens. 
These insects are, of our recorded species, most nearly allied to C. serrata, from 
which they differ in their rather larger size, flatter and less oval build, larger anten- 
nal club, laterally less rounded thorax (of which the denticulations are finer behind, 
and the punctuation is not quite so close), and less evidently pubescent but more 
finely punctured elytra,—the interstitial rows and the striz themselves being equally 
delicate, and so close that the surface seems very delicately transversely sub-strigose. 
These characters accord sufficiently well with those of C. obscura, Ch. Brisout (in 
Grenier’s Cat. et Mat. 1863, p. 73) ; but that species (stated by its describer to be 
often confounded with C. serrata) should be pitchy-black, with the elytra rather 
lighter towards the apex, so that it is darker than serrata, whereas these Richmond 
insects are of the same ferruginous-red as light serrata. Seeing, however, how 
much that species varies in colour, some latitude may be allowed to C. obscura. 
Unfortunately, the present state of affairs in Paris prevents me from obtaining 
M. Brisout’s opinion on this point. I find no description at all according with my 
insect in Mannerheim’s monograph.—Ip. 
Note on Cryptophagus Waterhousei, Rye.—I have little, if any, doubt that the 
Swedish insect referred to by Thomson in Skand. Col., v, p. 257, as a monstrosity 
of Cryptophagus acutangulus, in which the thoracic anterior callosities were on both 
sides confluent with the lateral denticle, should be referred to the species shortly 
afterwards described by myself (EH. M. M., vol. iii, 1866, p. 101) under the above 
name. It is in the highest degree improbable that so outrageous (and in both cases 
equilateral) a development should accidently occur in two instances; and I may 
observe, that, out of a very large number of Cryptophagi examined by me, including, 
of course, very many acutangulus, I have never seen such a peculiarity as that re- 
ferred to by Thomson in any one instance, even on one side of the thorax. Com- 
pared more strictly with C. acutangulus, to which it is undoubtedly very closely 
allied, C. Waterhousei (apart from the vast difference of the thoracic callosities) 
has the sides of the thorax much more contracted from the front towards the base ; 
and, even admitting the possibility of an equilateral amalgamation of the anterior 
and lateral teeth, the very lowest part of what would in that case be the lateral den- 
ticle is still very much above the normal position of the highest part of the lateral 
denticle of acutangulus. The punctuation of the thorax, moreover, is still closer, and 
of the elytra more delicate than in the latter ; the elytra themselves being somewhat 
shorter and more abruptly rounded at the apex. It would be interesting to 
know if these peculiarities exist also in Thomson’s insect above mentioned. 
