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NORTHUMBERLAND AND DURHAM. 61 
4, H. PARALLELO-GRAMMUS, Sturm. 
Heer. Fn. Col. Helv.,i., 154, 8.—H. lineatus, Steph. [llust. 
Mand., ii, 52.—Dytiscus lineatus, Marsh., 1., 426. 
“Mwizell."—P. J. Selby, Esq. 
5. H. porsauis, Lab. 
Steph. Illust. Mand., ii., 53.—Dytiseus dorsalis, Mab. Syst. 
JHA, Veg POSE 
“Mwizell."—P. J. Selby, Esq. Neweastle—Z. J. B. 
6. H. narus, Rudd. 
Steph. Iilust. Mand., ii., 192. 
Rare; Ouseburn in July.—7. J. B. 
7. H. sepTENTRIONALIS, Giyll. 
Hyphydrus septentrionalis, Gy//. Ins. Suec., iv., 385.—Hy- 
droporus alpinus, Steph. Illust. Mand., u., 54., pl. x1., 
is Be 
Common in gravelly brooks : Ouseburn, Derwent, &c. April 
—August. 
8. H. pavistt, Curtis. 
Curtis Brit. Ent., pl. 343.—Steph. Illust. Mand., v., 391. 
Among gravel; in a brook near Ravensworth, and in the Der- 
went. April—Aug. 
9. H. panusrris, Linn. 
Steph. Manual, No. 515. Hz. 6 pustulatus, Steph. LUlust. 
Mand., u., 54. 
Very common in ponds and running waters. 
10. H. aneusratus : Corpore oblongo-ovato, capite rufescente, tho- 
racis disco fusco,lateribus dilutioribus, elytris crebre evidenter 
punctatis, magis minusve fuscescentibus, pedibus rufis, anten- 
nis testacets, articulis apicalibus fuscis. Long. 1.—1} lin. 
H. angustatus, Sturm? Schaum, Zoologist, 1892.—H. 
tristis, Steph. Lllust. Mand., 11., 55 % 
At Prestwick Car, and elsewhere near Newcastle. 
Oblong-ovate, narrow, fuscous or black, shining, glabrous : 
head red, with a moderate depression on each side in front, be- 
tween which there is occasionally a triangular dusky spot, crown 
more or less fuscous; thorax dusky ferruginous, paler at the 
sides, posterior margin obliquely impressed, and with the sides, 
