38 YORKSHIRE NATURALISTS' UNION. 



vide etiam Steph., 111., March 3131,1835, p. 392, and Curtis, 

 ZooL, 1855, xiii. 4920-4921). 



5. S.W. — Hebden Bridge {Davis and Gibson). 



Hydroporus latus Steph. Local and scarce 



2. N.E. — Marten Lodge, Yorkshire (Z. Riidd; vide 

 Steph., III., June 15th, 1829, ii. 192). 



5. S.W. — Hebden Bridge, 1831 {S. Gibson; vide Loudon's 

 Mag. N. H., 1832, V. 555; and Curtis, Brit. Ent., 1831). 



Hydroporus duodecimpustu latus 01. Far from general 

 or abundant. It has never turned up in many of the best 

 investigated districts. 



1. S.E.— Driffield, October 1887 {W.C.H.). 



2. N.E. — Scalby {R. Lawson). 



3. N.W. — Wetherby {H. Crowther, Nat., June 1877, 

 ii. 176). 



5. S.W. —Near Wakefield {E.B. W., 1879). 

 Hydroporus depressus F. Locally abundant. 



1. S.E.— Driffield, October 1887 {W.C.H.). 



2. N.E. — Scarborough {R. Lawson) ; Marton, ' common ' 

 {L. Rudd, 1829); Coatham, September 1882 {W.C.JI.). 



4. Central. — River Foss at Strensall, May { W.C.H.). 



5. S.W. — Hebden Bridge Watercourse, 1831 {S. Gibson, 

 in Loudon's Mag. N. H., 1832, v. 555). 



Hydroporus assimilis Payk. Plentiful about York, and 

 probably further investigation will prove it to be much 

 more general than at present has been ascertained. 



1. S.E.— Beverley, June 1882 (W.C.H.). 



2. N.E. — Scarborough {R. Lawsofi). 



4. Central. — York, September (JV.C.Lf.) ; Selby, 

 May (^C.^.). 

 Hydroporus dorsalis F. A somewhat local insect, not 

 uncommon round York. 



1. S.E. — Brough (E. B. IVrigglesworth). 



2. N.E. — Coa.ih2iU\ {Baker JIudson). 



Trans.y.N.U., 1885 (pub. 1888). Series D. Vol. 3 



