154 
THE AQUATIC COLEOPTERA OF THE ISLE OF MAN, 
WITH SOME REMARKS ON THE ORIGIN OF THE 
FAUNA. 
FRANK BALFOUR BROWNE, M.A.(Oxon.), F.R.S.E., F.Z.S. 
(Continued from page 168). 
Ilybius fuliginosus F. Rushen (‘ Kentraugh Wood’) (Bailey); 
Andreas; Ballaugh; Jurby; Lezayre; Patrick. 
I. subeneus Er. Jurby (one specimen). 
I.. atey De G. Andreas; Ballaugh; -Jurby ; :Lezayre; 
Patrick. 
I. obscurus Marsh. Andreas; Ballaugh ; Jurby ; Lezayre. 
I. aenescens Thoms. Patrick (Foxdale, common in one 
pool). 
Copelatus agilis F. Andreas (one) ; Ballaugh (common in 
one locality). 
Rhantus bistriatus Bergstr. Ballaugh; Lezayre; Patrick 
(Foxdale). 
Colymbetes fuscus L. Bride (Point of Ayre) (Bailey) ; 
Andreas; Ballaugh; Jurby. 
Dytiscus punctulatus F. Arbory; Rushen (Bradda and 
Kentraugh) (Bailey) ; Andreas; Ballaugh; German; Jurby ; 
Lezayre. 
D. marginalis L. Rushen (Bradda two @) (Bailey) ; 
Patrick (Foxdale ¢ and 9). My visit was at a bad time for 
the imago of this species; I saw a fair number of well-grown 
larve. 
Gyrinus minutus F. Patrick (Foxdale, common in one 
pool). 
G. urinator AM. ~K. 2, vii, 1908" \Gsentrangh)?); vone 
specimen (Bailey) ; Jurby (one specimen). 
G. elongatus Aubé. Andreas; Ballaugh; Jurby; Patrick. 
G. natatoyr Scop. Arbory, Mallew and Rushen (Bailey) ; 
Andreas ; German; Jurby; Lezayre; Patrick. 
G. marinus Gyll. Ballaugh (The Curragh) (Bailey) ; 
Andreas ; Ballaugh ; Lezayre. 
Orectochilus villosus Mull. Mallew (Silverdale) ; Rushen 
(Colby Glen and Kentraugh) (Bailey); Ballaugh (stream in 
glen) ; Lezayre (Sulby River, etc.). 
Hydrobius fuscipes L. Andreas; Ballaugh, not common! 
H. fuscupes var. picicrus Thoms. Mallew (S. Barrule) ; 
Rushen (Bradda and Kentraugh) (Bailey); Ballaugh; Ger- 
man ; Lezayre. 
Philhydrus melanocephalus Ol.  Mallew (S. Barrule) ; 
Rushen (Bradda and Mull Hill) (Bailey) ; Andreas; Jurby. 
P. coarctatus Gredl. Ballaugh (The Curragh) (Bailey) ; 
Andreas ; Ballaugh; Jurby; Lezayre. 
Naturalist,, 
