I possess three species of the genus Berosus, all of which ap- 
pear to have been confounded by Continental writers under 
the name of Hydrophilus luridus , unless the II. signaticollis of 
Megerle be intended for one of them. The insect figured, 
however, was many years since distinguished and named by 
my friend Mr. Spence, whose Monograph upon the Cholevse, 
as well as his share in the labours of the “ Introduction to En- 
tomology,” bear ample testimony to his talent as a Naturalist, 
and have rendered his name familiar to every student in En- 
tomology. 
I cannot perhaps do better than proceed to give the charac- 
ters of the species : all of them are inhabitants of ponds and 
stagnant water, and are found from February to November, 
and probably the rest of the year. 
1. B. aericeps Spence . — Curt. Brit . Ent.pl . 240. 
This insect is rather rare in Norfolk, and is found occa- 
sionally in the neighbourhood of London. 
2. B. luridus Linn . Faun. Suec. n. 767. — Oliv. No. 39. pi. 1. 
fig. a , b. — Panzer’s figure (7. 3.) of H. luridus , if cor- 
rectly coloured, is another species. 
Similar to the last, but only half the size. Head more bril- 
liant in colour. Thorax with the spot considerably broader, 
but suddenly narrowed anteriorly and not divided down the 
middle. Elytra with the spaces uniformly punctured, not al- 
ternately stronger, a black spot near the middle close to the 
suture, and three beyond the middle extending across rather 
obliquely. Tips of the tibiae and tarsi fuscous. 
This is a common insect in Norfolk and round London. 
3. B. globosus Nob. 
Like the last in size, but more obtuse and globose ; ferru- 
ginous-ochre, shining, the head and thorax more deeply punc- 
tured, the latter with a short smooth elevated ferruginous line 
in the centre, the crenated striae on the elytra are very deep 
and black, the spots disposed as in B. luridus . Legs ferrugi- 
nous, four posterior coxae blackish, but not the tips of the 
tibiae and tarsi. 
This new species I obtained from the late Mr. Blunt’s ca- 
binet, but am not able to say whether it was taken in Essex or 
at Whittlesea Mere. 
The plant is Cochlearia anglica (English Scurvy-grass). 
