As the Ipes may be easily distinguished from the Nitidulae by 
their more convex form and quadrate thorax, I shall not at 
present enter further into their distinctive characters: it may 
be observed, however, that they are dissimilar in their ceco- 
nomy ; for whilst the former live under the bark of trees, the 
latter (with few exceptions) are either found in the bones or 
skins of dead animals, or in the flowers of plants. As there 
is only one species of our genus described in English works, 
I shall subjoin the characters of all the species found in these 
islands. 
1. I. ferruginea Linn . F. S. n . 4*3 3.~Payk. — Fab. — der- 
mestoides Panz . 8. 15. — linearis Lat. 
Linear, elongated, pale ferruginous, shining, strongly and 
thickly punctured. Thorax not broader at the base than 
before. Scutellum minute. Elytra linear. 
It was not known to be British until I took 2 specimens 
near Norwich, many years since, in the month of May: spe- 
cimens were subsequently taken in Norfolk by Mr. Brightwell 
and Mr. Sparshall, and I have received others from Mr. R. 
Wood of Manchester. It is found under the bark of dead 
Pine-trees. 
2. I. 4-pustulata Linn. F. S. n. 446. — ■ Oliv . v. 2. n° 12. 
pi. S.f 22. — Marsh, p. 130. 
Generally larger than the following. Linear-elongate, 
somewhat depressed, black, punctured. Thorax transverse- 
quadrate, each elytron with 2 reddish spots, the anterior one 
sinuated trilobed, the other a little beyond the middle trans- 
verse ovate. Tarsi piceous. 
This rare insect lives under the bark of Birch and Sallow- 
trees ; it has been taken at Bexley by Mr. Samouelle, in the 
decayed stumps of trees, in September; it is found also in 
May, July, and August. 
3. I. 4-guttata Fab. — Panz. 3. 18. — Oliv. 2. n° 12. pi. 3. 
f 25. 
Generally smaller and narrower than the following; black, 
shining, and rather minutely but not very thickly punctured. 
Elytra with 2 stramineous marks on each; one at the shoulder 
semilunar with the margin sinuated ; the other towards the 
apex, transverse-ovate, strangulated in the centre. Antennae 
and legs castaneous, the club of the former piceous. 
This I believe was first taken by Mr. D. Bydder in May 
1815, in the New Forest, upon felled Oaks, where the sap 
exuded. 
4. I. 4-punctata Herb. — Curtis Brit. Ent. pi. 306. 
Taken at the same time and place as the last species. 
The plant is Senecio viscosus (Stinking Groundsel). 
