NEW BRITISH SPECIES, ETC., IN 1861-62. 71 



exponent of it in the Stephensian Collection is certainly 

 JuilensU, Fab. It is much broader and shorter than tho 

 last-mentioned insect, and more like H. assimilis, but with 

 the thorax not contracted behind : its colour is flavescent, 

 with two black central thoracic marks, and the elytra with 

 thin black striae, a scutellar patch, four spots on the disc, and 

 six or seven round the margins, all more or less distinct. 

 Recently examples have been taken by the Rev. H. Clark 

 in Horning Fen, and by Dr. E. Adams near Stowmarket ; 

 Dr. Power has also specimens from the latter locality, and 

 has long separated them in his collection as a distinct species. 



17. Hydroporus derelictus, Clark, Proc. Ent. Soc. 



1 Sept. 1862, Zool. 8219 (1862), Journ. Ent. i. 471 

 (described). 

 Nearly allied to U. planus, Fab., but slightly narrower, 

 more parallel, and not so rounded, with pubescent deep black 

 elytra; it differs from II. enjthrocephalus, Linn., (which it 

 resembles in the colour of head and elytra, and in its fuscous 

 tarsi,) in being less rounded and larger. 



Taken in the Island of Orkney, August, 1855. 



18. Hydroporus celatus, Clark, Proc. Ent. Soc. 1 Sept. 



1862, Zool. 8219 (1862), Journ. Ent. i. 473 

 (described). 



Closely resembling H. vithda, Er., but larger, thoracic 

 punctures less regularly distributed, the sti-iee on the elytra 

 less distinct, legs entirely rufo-flavous, and very like a large 

 H. pubescenSy Gyll., but with finer punctuation. Its place 

 is next to li. GyllenJiallu in our lists. 



Taken in Bradgate Park and Black Park by Dr. Power, 

 also in Tilgate Forest by Mr. Brewer. 



