HEY : LIST OF YORKSHIRE COLEOPTERA. 39 



4. Central. — Ponds north of York {W.C.H.); Ask- 

 ham Bog {W.C.H.) ; (vide etiam E. M. M., June 1872, ix. 

 12, and E. M. M., May 1868, iv. 283). 



5. S.W.— Wakefield {E. B. Wrigglesworth). 



Hydroporus oblongus Staph. This is one of the insects 

 which swell the fame of Askham Bog, where it was first 

 taken by the late Archdeacon Hey. References to its 

 capture will be found in the Zool.^ 1857? xv. 541 1 ; E?itojn. 

 Annual, 1866, p. 48; E. M. M., June 1872, ix. 12, and 

 May 1868, iv. 283. 



It is a particularly early insect. I have taken it as 

 early as February nth. It is never abundant, but I once 

 secured half a dozen specimens at a time. It becomes 

 very scarce after the month of April. Its haunt is a shallow 

 pool thickly moss-grown. 



4. Central. — Askham Bog ( W. Hey, W. C. H., and 

 H. Hutchinson). 



Hydroporus memnonius Nic. Rather an uncommon insect. 



1. S.E. — Brough {E. B. Wrigglesworth). 



2. N.E. — Scarborough {R. Lawson). 



4. Central.— Boroughbridge, August 183 1, taken by 

 T. C. Thompson (C C. Babington in Loudon^ s Mag. 

 N. H, 1832, V. 328) ; many ponds about York ( W.C.H.) ; 

 Askham Bog, 1856 {W. Hey); and 187 1 {H. Hutchinson). 



5. S.W. — Hebden Bridge, 183 1 {Sam. Gibson,m. Loudon's 

 Mag. iV. 7^^, 1832, V. 555); Wakefield {E.B. W.). 



Hydroporus obsoletus Aube. Scarborough appears to be 

 the only locality recorded for this species. Mr. Lawson (of 

 that town) refers to an abnormal structure in the right 

 antenna of a specimen taken there in April 1872 (vide 

 E. M. M., May 1872, viii. 288). 



2. N.E. — Scarborough {R. Lawson and W. Hey). 



Hydroporus gyllenhalii Schiodte. Very local, and nowhere 

 abundant. 



