COLEOPTEROUS FAUNA OF LIVERPOOL DISTRICT. 199 
Hydroporus rivalis, Gyll. Formerly in clay-pits behind 
Wavertree Park (J.W.E.); Crosby (C.8.G.). 
Hydroporus septentrionalis, Gyll. Recorded from Brom- 
borough Pool (C.S.G.); near Westminster Road, Kirkdale, 
freely (F.K.). 
Hydroporus Davisw, Curt. ‘‘ Bidston Marsh, freely, in 
spring”’ (C.S. G). 
Hydroporus duodecimpustulatus, Ol. Ditches at Huyton, 
Knowsley and Bebington (C.8.G.). 
Hydroporus depressus, F. Generally distributed, but not 
common. 
Hydroporus assvmilis, Payk. ‘‘ This species, first identified 
here by Dr. Schaum, from specimens taken by the late Mr. 
Johnson and myself in 1840, in Mosslake Fields, has not 
been taken since this ground was built upon” (C.S.G.). 
Behind Wavertree Park, in 1875 (J.W.E.); Kairkdale 
(F'.K.); Liscard (R.W.). 
Hydroporus dorsalis, F. Local. ‘‘ Bidston Marsh and 
Frankby” (C.S8.G.); abundant in a pit at Moreton, April 
(J.W.E.); freely at Tranmere (W. Gardner); and at 
Liscard (R. W.). 
Hydroporus menmonius, Nic. Kirkdale (F.K.); recorded 
(wm ltt) by Mr. Chappell from a small pool in the Crosby 
sandhills, in April; I have taken it in a pond in a quarry 
at West Derby. 
Hydroporus Gyllenhalu, Schiodte. I have taken this 
very distinct species on the Wallasey sandhills and in 
drains on Simmonswood Moss. 
Hydroporus erythrocephalus, L. ‘‘ Bidston Marsh and 
Frankby” (C.8.G.); Crosby (F. Archer); Hightown 
GAN dye 
Hydroporus lituratus, F. One specimen of this species 
behind Leasowe Embankment, in March, 1886 (J. W.E.). 
Hydroporus planus, F. Abundant. 
