278 Lincolnshire Coleoptera. 
HYDROPORUS RIVALIS Gyil 
Somewhat local 
N 3, Ulceby, 12-8-1906, W W. 4, Croxby Pond, 8-1906, W W, 
Laceby, 11-5-1908, A B. 8, Hubbard's Valley, Louth, 
13-8-1908, C. Gifford. ‘ 
HYDROPORUS HALENSIS F 
This is a fen species but appears to be rare in the County 
N 3, Uleeby in running water, a single specimen, 12-8-1906, 
ww 
HYDROPORUS DORSALIS F 
Local 
N 4, Irby Dale, 7-9-1907, A B. Waltham, 8-8-1908, C. Gifford. 
7, Holton-le-Moor, 12-6-08, L N U., A B. 11, Alford, 
20-8-1908, LN U., W W 
HYDROPORUS LINEATUS fF 
Frequent 
N 3, Ulceby, 12-8-1906, W W. 4, Irby Dale, 7-9-1907. W W. Clee- 
27-8-1908, C Gifford. 6, Marton drain, AT. 7, Holton-le- 
Moor, 12-6-1908, LN U., AB. 9, Tetney, 16-4-08, A B 
HYDROPORUS UMBROSUS Guyll 
Very local 
N 4, Irby Dale, in one pond in large numbers, 14-5-1908, W W 
HYDROPORUS ANGUSTATUS Sturm 
Local and in small numbers when found 
N 4, Bradley, 11-4-1908, A B. Irby Dale, 14-5-1908, W W 
HYDROPORUS GYLLENHALI Schiod 
Not common 
N 1, Haxey and Epworth, three specimens, 14-7-1898, A T. 9, 
Tetney, one specimen, 16-5-1907, A B., the only instance of 
its occurrence in the Grimsby District 
HYDROPORUS VITTULA Er 
Rare 
N 4, Irby Dale, a single specimen, 14-5-1908, W W 
HYDROPORUS PALUSTRIS L 
By far the commonest species of the genus 
N 1, Haxey and Epworth, 14-7-1898, A T. 3, Cadney, AT. 4, 
Clee, 20-4-1899, AS. 6, Marton, AT. 7, Linwood, 8-6-1908, 
W Ww. 8, Holton-le-Clay, 5-7-1908, W W. 9, Humberstone 
in brackish water, 26-8-1908, C. Gifford. 10, Woodhall, 
7-8-1893, L NU. 11, Alford, 20-8-1908, L N U., WW 
S 13 Court Leys, 5-1900,5 CS 
HYDROPORUS ERYTHROCEPHALUS L 
Common 
N 1, Haxey and Epworth, 14-7- 1898, A 'T. 3, Cadney, 8-1897 A T. 
4, Cleethorpes, 5-7-1894, L N U., WFB. 6, Marton drain, 
A . Uf Holton-le-Moor, 12-6- 1908, L NO A B. Q, 
Humberstone in brackish ditch, 26-8-1908, C, Gifford, 
11, Alford, 20-8-1908, L N U., W W 
