NORTHUMBERLAND AND DURHAM. 67 
2. G. minutus, Fad. 
Fab. Syst. EL, i., 276.—Steph. Ilust., Mand., 1i., 96. pl. xiii., 
ieee 
Borders of pools in the vicinity of Newcastle—G@. Wazles, Esq. 
3. G. naTator, Linn. 
Steph. Illust., Mand., ii., 97.—G. substriatus, Ib. 0. c. 
Common. 
It feeds upon Diptera and other insects that fall into the wa- 
ter, which it grasps betwixt its anterior legs, and plunging its 
mandibles into the thorax, imbibes the juices. 
4, G. urinatTor, lig. 
Heer, Fn. Col. Helv. i., 165, 1—G. lineatus, Hoff, Steph. 
Lllust. Mand., u1., 97, pl. xiii., f. 1.—Boisd. et Lacord. Faun. 
Ent. Paris, 1., 342, 2. 
Rare; in the Ouseburn from March to August.—Z’. J. B. 
63. OrEctocHEILus, Hschscholtz. 
1. O. vittosus, Z77. 
Gyrinus villosus, Steph. Illust., Mand., ii., 98. 
In the Wansbeck, near Meldon Park.—G@. Wailes, Hsq. Ouse- 
burn in August.—7. J. B. 
SuB-TRIBE 2, RYPOPHAGA, Stephens. 
Siigps 1. PHILHYDRIDA, Mac Leay. 
Famity 1. PARNIDA, Mae Leay. 
Sus-ramiLy 1. ParnipeEs, Westw. 
64. Parnus, Fabricius. 
1. P. pRoLiFERIcoRNts, Fab. 
Steph. Illust., Mand., uu., 103. 
On the borders of weedy pools; Prestwick Car, Gosforth, Long 
Benton, Boldon Flats, &e.—Z. J. B. April—July. 
2. P. auricuLatus, Panz. 
Steph. [llust., Mand., ii., 104. 
Marshy land near Follingsby—Wr. A. Hancock. Under 
moss in a field on the south side of the Derwent, opposite Ax- 
well spa well.—J. H. Beneath stones, Ouseburn Dean.—Z. J. B. 
April—September. 
