22 CATALOGUE OF 



H. LiNEATOCOLLis Marsh. Gyll. 



Steph. Aube., Erich. Common, 



bistriolatus Duft. tSturm. 

 tiimaculatus JJrap. 



H. LiNEATus Aube. Loch Leven ; Swinton ; Berwick- 



coufiuis tSteph. sliire. 



H. OBLiQuus Fab. Panz. /Steph. Whitadder ; Berwickshire. 

 CO u fill ens Fab. 

 marmoreus Oliv. 



FAMILY GYRIlVIDiE. 



GYRINUS Geoff. 



G. MINUTUS Fab. Steph. Near Hawick ; Water-of-Loith, and 



bicolor Oliv. (not Paijk.) Braid ponds, near Edinburgh ; 



Berwickshire ; near Paisle3^ 



G. NATATOR Lin. Gyll. Steph. In ponds. Common everywhere. 

 Aube. 

 var. substriatus Steph. 



G. MARiNUS Gyll. Ahr. Erich. Duddingston Loch, and Lochend — 

 Aube. Steph. Canal near Glasgow and Paisley ; 



natator Fab. (not Lin.) Linlithgow Loch. 



feneus Stepli. var. major 

 (not Aube.) 



aeratus Steph. var. minor. 



dorsalis Gyll. var. 



ORECHTOCHILUS Esch. 



O. viLLOsus Fab. Gyll. Steph. In the Jed, near Jedburgh ; Earl- 

 Aube. ston ; Loch Lomond; Kelvin; 



abundant in Eden, near Nen- 

 thorn. 



FAMILY IIYDROPniLIDiE. 



HELOPHORUS Fab. 

 H. NUBiLUS Fab. Steph. Not rare, 



cinereus Marsh. 



