OF NORTHUMBERLAND AND DURHAM. 271 



2. H. NiGRiTA. The most abundant species, of this genus, in the 

 district. Morpeth, Gosforth, Ouseburn, Boldon Flats, and 

 Whittle Dene.— r. J. B. March— October. 



Family 3. HYDROPHILIDJS. 



69. LiMNEBIUS. 



2a. L. Papposus, Mulsant. 



Muls., Col. de France, Palp., 92. — L. mollis? Steph. Illust, 

 Mand., ii., 121. 

 Shotlej Bridge.— r. J. B. Julj. 



70a. Philhydrus, Solier, 



1. P. MEL ANOCEPH ALUS, Fob. 



Mids,, Col. de France, Palp)., 137. — Hjdrobius melanoce 

 phalus, Steph. IllusU, Hand., ii., 129. — Var. H. testaceus, 

 Fah. Syst. El, i., 252. — Id. Steph, I.e. — H. torquatus, 

 Id. — H. ochropterus, Id. I.e., 130. 

 The variety testaceus, in old peat heaps, on Whitsunbank Hill. — 

 J. H. 



2. P. MARGINELLUS, Fob. 



Mids , Col. de France, Palp., 141. — Hydrobius affinis, Steph. 

 Illust., Mand., ii., 131. — H. marginellus. Id. I.e. 

 With the preceding, but more abundant. — J. H. July. 



71. Laccobius. 



3. L. Marshami. This is probably a variety of L. glohulis and, 



like it, is generally distributed. 



71a. Ch^tarthria, Waterhouse. 

 1. C. SEMiNULUM, Payk. 



Steph. Illust., Mand., ii., 135. — Id., v., 401. 

 Among rubbish, near the mill-lead, at Winlaton Mill. — J. H. 



Family 4. SPHiERIDIID^. 



74. Cyclonotum. 

 1. C. okbiculare. In a pond, at Gosforth. — T. J. B, May. 



