96 COLEOPTERA. 



dark legs and palpi of this insect prevent it from being con- 

 founded with any of our Ochthebiij except perhaps O. ex- 

 aratus; from which its closer punctuation and posteriorly- 

 contracted thorax at once distinguish it. 



A single example w^as taken by Dr. Power, in brackish 

 water on the south coast, in 1866; and it has since been 

 found in some numbers by Dr. Sharp and Mr. Crotch under 

 similar conditions near the Chesil Bank. 



It has been returned to me as unknown by M. C. Brisout 

 de Barneville. 



137. OcHTHEBius BicoLON, Germ. 



var. ritfimarginatus, Steph., Er. 



In the Catalogues of De Marseul and Gemminger and 

 V. Harold this correction is given; one in which I find it 

 difficult to concur, but on which, owing to paucity of 

 material, I am unable to form a decided opinion. 



138. OCHTHEBIUS HIBERNICUS, Curtis. 



hifoveolatusj Waltl. 



Stein follows De Marseul in separating Curtis' insect from 

 punctatuSf Steph. (with which it is identical, according to 

 Wat. Cat.), and refers to it bifoveolatus, Waltl, and nobilis, 

 Heer, as synonyms. De Marseul ascribes nobilis to 'punc- 

 tatus, and, as mentioned in Ent. Ann., 1866, gives bifoveo- 

 latus precedence over hibemicus. 



139. Hydr^na concolor, Waterh., Ent. Mag., i, 1833, 

 293; Gemm. & v. H., 1. c. ; E. C. Rye, 1. c. 

 This insect, not appearing in the synonymy of Mr. Water- 

 house's Catalogue, is given as distinct by Gemminger and 



