OF NORTHUMBERLAND AND DURHAM. 2G7 



This is not indigenous, beinpj a native of the banks of the 

 Mississippi, in North America. How it got introduced into my 

 collection, I can only conjecture. In preparing for the Cata- 

 logue, I found it standing among the insects from the locality 

 cited for it; but it may have been inadvertently placed there by 

 the party who set up the insects, and who may have found it 

 floating in his tea-cup. — J. II. 



32. B. LATERALS, Leach. 



Cillenum laterale, Catalogue, No. 1. 

 In abundance, near Camboise, in May. — Mr. John Scott. Under 

 stones, between tide-marks, near Budle, in June. — J. H. 



HYDRADEPHAGA. 

 Family 1. DYTICID^. 



52. Haliplus. 

 3a. H. coNFiNis, Steph. 



Steph. Illust, Mand., ii., 41. — H. lineatus, Auhe. Heer, Fn. 

 Col. Helv., i., 162. — H. obliquus. Catalogue, No. 3. Var. 2. 

 Kenton, Gosforth, Marsden, Boldon Flats, &c. April. 



5Q. Hydroporus. 

 5. H. dorsalis. Not uncommon, at Gosforth. — T. J. B. July — ■ 

 October. 



9a. H. Gyllenhalii, Schiddte. 



H. rufifrons, Steph. Illust, Mand., ii., 5Q. 

 Very rare; Gosforth. — T. J. B. 



96. H. TRisTis, Payk. 



Heer, Fn. Col. Helv., l, 15^. 

 Not common; Prestwick Car. July. — T. J. B. 



10. H. anqustatus. Gosforth. — T. J. B. Whitsunbank Moss. — 

 J, H. 



