Browne: The Aquatic Coleoptera of the Isle of Man. 135 
although not absent from rapidly flowing, gravelly streams, are 
commoner in the more sluggish and muddy ones. 
In the following list I have mentioned the parish in the case 
of every record, as Dr. Cassal told me that he recorded all his 
captures of lepidoptera on that basis. Dr. Bailey’s name is 
mentioned in connection with all the records I have taken from 
his collection, and a bibliography at the end of the paper 
includes all the references to Manx water beetles that I have 
been able to find :— 
Brychius elevatus Panz. Andreas (common in one small 
stream). 
Haliplus confinis Steph. Andreas : Ballaugh [only three 
specimens]. 
H. flavicollis Sturm. Rushen (Colby R., Kentraugh), 
(Bailey) : Ballaugh, only in the Killane River. 
H. fulvus F. Andreas; Ballaugh ; Lezayre. 
H. ruficollis De G. Rushen (Bradda and Kentraugh), 
(Bailey) ; Andreas ; Ballaugh ; Jurby ; Lezayre; Michae. 
Hf. lineatocollis Marsh. Rushen (Bradda, Cronk Mooar, 
Fleshwick and Colby River) (Bailey) ; Andreas ; German : 
Jurby ; Lezayre. 
Noterus sparsus Marsh. Ballaugh ; Jurby. 
Laccophilus obscurus Panz. Andreas : Ballaugh ; Jurby ; 
Lezayre ; Michael. 
Bidessus minutissimus Germ. Lezayre (Sulby River, two 
specimens). 
Celambus inequalis F. Andreas : Ballaugh ;  Jurby; 
Lezayre. 
Deronectes latus Steph. Lezayre (Sulby River), (common). 
D. depressus F. Rushen (Cronk Mooar and Kentraugh), 
(Bailey). ; Andreas ; Ballaugh ; Jurby ; Lezayre (Sulby River, 
SEC:): 
D. 12-pustulatus Ol. — Rushen (Kentraugh, Colby R.), 
(Bailey) ; Jurby ; Lezayre (Sulby R., etc.). 
Hydroporus pictus F. Andreas : Ballaugh; = Jurby ; 
Lezayre. 
FH. lepidus Ol. Rushen (Cronk Mooar), (Bailey) ; Andreas: 
Ballaugh ; Jurby. 
H. septentrionalis Gyll. German (KR. Neb.) ;; Lezayre 
(Sulby R., etc.). 
H. lineatus F. Andreas : Ballaugh ; Jurby ; Lezayre. 
Al. tristis Payk. Ballaugh (900 feet) several. 
H. umbrosus Gyll. Andreas : Ballaugh ; Jurby ; Lezayre. 
H. gyllenhalii Schiéd. Rushen, etc. (Bailey) ; Andreas ; 
Ballaugh ; German : Jurby ; Lezayre. 
H. morio Dej. Lezayre (Snaefell and Mallew (S. Barrule), 
(Bailey) ; Ballaugh (950 ft.). 
1gtr Mar. 1. 
