108 COLEOPTERA. 



DYTISCIDiE. 



HALIPLUS. 



obliquus. F. Findern. 

 mucronatus. Steph. In a ditch at Burton, 

 fulvus. F. Ponds and ditches. Not common, 

 cinereus. Aube. Repton brook and ditches at Twy- 



ford. Rare, 

 fluviatihs. Aube. Common in the river, 

 ruficollis. De Gr. Common in ditches. 

 lineatocoUis. Marsh. Common in ditches. 



BRYCHIUS. 



elevatus. Pz. Repton Brook, and Dove at Egginton. 



PELOBIUS. 



Hermanni. F. Once at Twyford. 



HYDROPORUS. 



reticulatus. F. Common in ditches. 



quinqueUneatus. Zett. Very rare. 



ingequahs. F. Common. 



pictus. F. Common. 



duodecimpustulatus. 01. Dove at Egginton. 



dorsahs. F. Twyford. Not common. 



memnonius. Nic. Twyford. 



erythrocephalus. L. Very common. 



marginatus. Duft. Twyford and Egginton. Very 



rare, 

 hturatus. F. Not uncommon in ponds in woods, 

 planus. F. Not uncommon in ditches, 

 melanocephalus. Steph. Very common, 

 nigrita. F. Common. 



