stimulated to repeat the discharge several times by scratching 
their backs with a pin ; and I have distinctly heard the report 
when they were dropped into a bottle of spirits of wine. 
1. B. crepitans Linn.—Panz . 30. 5. — immaculicornis Dej. var. 
‘—Don. 14?. 486. Reddish-ochre; 3rd and 4th joints of 
antennae generally piceous, except at their tips ; elytra 
green, bluish, or black, sparingly punctured, with about 
8 elevated lines on each ; abdomen black ; 3 to 4| lines 
long. 
From March to October on the shores of large rivers and 
the sea, also under stones and clods in fields : not uncommon 
at Hertford; Boxhill; Gravesend; Southend; Cobham, Surrey; 
Kimpton ; Oxford ; New Forest; Isles of Wight and Portland ; 
Sherborne; Teign mouth ; near Swansea, and Glamorganshire. 
It is remarkable that Mr. Paget has not found it at Yarmouth, 
nor Mr. Dale at Glanville’s Wootton. 
2. explodens Di/ft . — Sturm . D. F. tab. 177. A. Ferruginous; 
elytra somewhat smooth, cyaneous ; antennae with the 
3rd and 4th joints as well as the abdomen fuscous : 2 to 
2^ lines. Dej. 
Whether this be distinct from the foregoing I am not able 
to determine, but the British specimens I have seen appear to 
be only small black varieties of R. crepitans. It is said to have 
been taken in April at Southend ; Portland and Swanage in 
June; Isle of Purbeck, September ; also at Charmouth, Teign- 
mouth, and Dawlish Warren. 
3. glabratus Bonelli. — Dej. Icon. t. 8. f. 8. Ferruginous ; 
elytra somewhat smooth, cyaneous, abdomen fuscous : 2| 
to 3 lines. Dej. 
Of this I have never seen a British specimen, but it is said 
to have been taken at Ashburton and Dover in June. 
4. sclopeta Fab. — Curt. B. E. pi. 554. Reddish-ochre, head 
and antennae with a castaneous tint ; elytra blue or green- 
ish, with a long reddish stripe down the base of the 
suture nearly to the middle ; minutely punctured and 
clothed with ochreous pubescence, the elevated lines very 
indistinct. 
September, under stones, Devonshire, Dr. Leach ; but most 
of the specimens were captured, I believe, by Mr. G. B. Sow- 
erby on the shore near Margate several years since. 
Obs. On the 2nd and 3rd joints of one of the antennae of the 
specimen dissected (fig. 6. a)’ were attached some lanceolate 
appendages, a few of them having a bundle of smaller ones at 
the apex ; they were so firmly united that I could not separate 
them, and at first I thought they had been diseased and dilated 
hairs. 
The Plant is Bottbollia incurvata (Sea Hard-grass). 
