NORTHUMBERLAND AND DURHAM. 69 
2. H. granuaris, Linn. 
Steph. Illust., Mand.,11., 111. 
Common. 
3. H. griseus, Herbst. 
Steph. Illust., Mand., ii., 112. 
Common. 
4, H, viripicouiis, Kirby. 
Steph. Illust., Mand., ii., 112. 
“Twizell."—P. J. Selby, Esq. 
5. H. nusrius, Fab. 
Steph. Illust., Mand., u., 113. 
“Twizell."—P. J. Selby, Hsq. Long Benton, on the sands 
at Shields, Hartlepool, cc. 
6. H. rennicus, Payk. 
Steph. Illust., Mand., u1., 113. 
“Mwizell."—P. J. Selby, Esq. Long Benton, and Shotley 
Bridge in June and July.— 7". J. B: 
67. OcutuEsBius, Leach. 
1. O. pyemats, Fab. 
Steph. Illust., Mand., i1., 115. 
Boldon Flats.—7. J. B. In the pools near Marsden.- J. H. 
April. 
2. O. ExcuLptus, Jiller. 
Heer, Fn. Col. Helv., i., 478, 5.—Mulsant, Col. de France, 
Palp., 54, 2.—Enicocerus viridieneus, Steph. Jilust., 
Mand., ii., 196, pl. xv., f- 6 (mas).—H. Gibsoni, 
Curtis, Brit. Ent., pl. 291.—Steph. 1. ¢., v., 879 (foem ).— 
K. tristis, Curt. 1. ¢., Steph. U. ¢., v., 379 (mas). 
“Brook near Meldon, and at Tynemouth.”—G. Wazles, Esq. 
“Twizell.".—P. J. Selby, Hsg. In the Ouseburn, August.— 
IU, di dix 
An interesting account of the larva of this species has been 
given by Mr. Wailes in the Entomological Magazine, vol. 1., 256. 
The insects, where he observed them, frequented half-exposed 
blocks of coarse sandstone in brooks, lurking in the slight in- 
equalities, on a level with the surface of the water, or a little 
above it. They occur most abundantly in autumn, when the 
