156 THE SCOTTISH NATURALIST 



British collections was not the true distinctus, Dej., and that 

 the species standing under that name was undescribed. He 

 accordingly proposed the name shai-pi for it. B. sharpi has 

 occurred in Arran, Clyde Islands, in moss and under stones 

 amongst heather at Catacol and Machrie Bay. The distinctus 

 of British collections had been recorded from the Solway area 

 in Scotland but never from Clyde. The true distinctus, Dej., also 

 appears to occur in Britain, as it has been recorded from Bourne- 

 mouth by Dr Sharp {Ent. Mo. Mag., xlix., 54). 



Dromitis melaiwcephalus, Dej. — Lanark, scarce, in moss in a 

 wood near Lanark. 



Hydradephaga. 



Hydroporus latus, Steph. — -Clyde Islands, sparingly in a 

 small stream at Machrie Bay, Arran, during June 191 7. This 

 species is rare or at anyrate very local. 



H. griseostriatus, De G. — Clyde Islands, in lochs at a fair 

 elevation in Arran (Fergusson, Glasgow Nat., v., 17). I have not 

 yet met with it at a lower elevation than about 800 feet. It occurs 

 along with the succeeding species, but it is also found in many 

 lochs in which lapponicus is not to be seen. 



Dytiscus lapponicus, Gyll. — Clyde Islands in a loch in Arran 

 about 800 feet above sea-level (Fergusson, Glasgow Nat., v., 15). 



Palpicornia. 



Helophorus affinis, Marsh. — This species was recorded for 

 Clyde in the first list of additions {Glasgow Nat., ii., 88), on a 

 specimen without definite locality. It has since been found in 

 the following counties: Dumbarton, in brackish pools at Bowling; 

 Renfrew, in brackish pools at Langbank -. Ayr, in the Irvine 

 where the river is tidal. 



H. gra?iularis, L. {brevicollis, Th.). — Rare, in standing water, 

 Cantyre, near Bellochantuy, September 1912 (Fergusson, Glasgow 

 Nat., viii., 51); Clyde Islands, one example at Machrie Bay in 

 a ditch on the shore. 



Hydrcena pygmcea, Wat. — Rare, Clyde Islands, very sparingly 

 in moss in a little trickling stream on the hill behind Whiting Bay, 

 Arran, during September 19 16. 



Philhydrus nigricans, Zett. — Lanark, Symington (A. H. May). 



Brachelytra. 



Aleochara diversa, J. Sahl. {inoesta, Brit. Cat.). — The Aleochara 

 mcesta of British collections really comprehended two species as 



