- 9 6 The Scottish Naturalist. 



NITIDUS Fab. Local. Lowland. 



Distribution — East. Tweed Forth o o Moray o o o 



West, o o o o o 



GATTATUS Payk. Abundant. Lowland, highland. 

 Distribution — East: Tweed forth Tay Dee Moray o o o 

 West. Solway §000 



NEBULOSUS Forst. Common. Lowland. 

 Distribution — East. Tweed Forth Tay Dee Moray 000 

 West. Solway §000 



CONSPERSUS Marsh. Local. Maritime. 



Distribution — East. o Forth o 00000 



West. Solway 0000 



AFFINIS Payk. Very rare. Lowland (?) 



Distribution — East. 00 000000 



West. Solway 0000 

 Specimens of A. unguicularis have usually been mistaken for this species. 



UNGUICULARIS Thorns. Not common. Lowland. 

 Distribution — East. Tweed Forth 000000 

 West. Solway Clyde 000 



FEMORALIS Payk. Local. Lowland. 



Distribution — East. Tweed Forth Tay § Moray 000 

 West. Solway Clyde 000 



MACULATUS Linn, Common. In running water. Lowland. 

 Distribution — East. Tweed Forth § Dee Moray 000 



West. Solway Clyde 000 



A small dark variety, A pulchelhcs Heer. , occurs in some of the High- 

 land lochs. 



DYTISCUS Schaum. 



marginalis Lin. Common. Lowland, highland. 

 Distribution — East. Tweed Forth Tay Dee Moray 000 



West. Solway Clyde 000 



punctulatus Fab. Not common. Lowland. 

 Distribution — East. Tweed Forth Tay § Moray 000 



West. ' Solway §000 



lapponicus Gyll. Very local. In highland lakes. 

 Distribution — East. 0000 Moray 000 



West, o Clyde Argyle o o 



(To be continued. J 



