NORTHUMBERLAND AND DURHAM. 65 
5. C. cHaLconotus, Kugelan. 
Steph. Illust., Mand., ii., 76.—Dytiscus concinnus, Marsh.,i., 
497. 
Common. “ Twizell.".—P. J. Selby, Esq. Prestwick Car, 
Long Benton, Boldon Flats, Sunderland. April—July. 
6. C. arrinis, Payh. 
Steph. Ilust., Mand., ii., 78. 
Rare. Prestwick Car in April.—Z. J. B. 
7. C. patuposus, fab. 
Steph. Illust., Mand., ii.. 74.—Dytiscus paludosus, Fab. 
Syst. H1., 1., 266. 
Rare ; Prestwick Car, Ouseburn, and Long Benton.—Z. J. B. 
8. C. rEMoRALIS, Payk. 
Steph. Lllust., Mand., ii., 77. 
Prestwick Car. April and July. 
9. C. macuLatus, Linn. 
Steph. Ltlust., Mand., i., 74. 
Among gravel in the shallow parts of running streams, very 
common. 
A dark variety is found in the Derwent. 
10. C. virrevus, Payk. 
Steph. Illust., Mand., i., 75. 
For a knowledge of this species we are indebted to P. J. Sel- 
by, Esq., who finds it in a pool at Twizell, seemingly rare. 
11. C. srpuncratus, Lab. 
Boisd. et Lacord. Faun. Ent. Paris.,1., 317, 10.—Heer. Fn. 
Col. Helv.,i., 150, 26.—C. nebulosus, Forst. Steph. Lllust., 
Mand., ii., 72. 
Common. 
12. C. sturmi, Gyll. 
Steph. Illust., Mand., 11., 78. , 
Not uncommon. 
13. C. srpustuLatus, Linn. 
Steph. Illust., Mand., i1., 80. 
Abundant. 
A dark chesnut variety is often met with. 
Like the other species, it takes flight in the evening, and this 
ie 
