50 COLEOPTERA. 



narrower form, with less variegated elytra, which are more 

 sparingly and more distinctly punctured, and with the disc 

 of the thorax im punctate. 



Some years ago, I detected a single specimen of this insect 

 among some Coleoptera sent to me for names by Mr. Edle- 

 ston, of Manchester, who informed me that it was taken by 

 the late Mr. Ashworth in North Wales. This insect I failed 

 to identify satisfactorily (after much trouble of comparison 

 with European types and examination of authorities) with 

 any recorded species, though finding it, as I thought, ex- 

 tremely close to M, obsoletuSf from which, apart from its 

 Syrian, Grecian and Spanish localities, I considered the 

 single specimen before me to differ in certain points of 

 structure. 



This insect was again sent up to London, and the name 

 " Ashworthi " attached to it provisionally by Dr. Power. 



I have subsequently obtained another specimen from the 

 North ; and it has been taken by Mr. Bold, at Gosforth, and 

 by Mr. Crotch, Mr. Lennon and Dr. Sharp in the North of 

 England and South of Scotland. I have, in my short series 

 of H. ferruginenSj examples which are almost as narrow as 

 the type ohsoletus ; and one in which the punctuation of the 

 elytra is very much more widely and distinctly punctured 

 than in the others. 



Dr. Sharp, in his notice of this species, makes some in- 

 teresting remarks on the eccentric geogra[)hical distribution 

 of certain Hydradephaga, amongst which he particularizes 

 IIydropo7'US quinque-lineatus diS being found only in Lapland 

 and on the borders of England and Scotland ; to these loca- 

 lities must be added Killarney, in Ireland, where Mr. J. Ray 

 Hardy found it in profusion. 



