N:o 17] Gontributions to the knowledge of the Shetland- and Orkney-Islands. 5 



Haliplidae. 



39. Haliplus obliquus Fabr. Orkney, at OrpMr, two specimens. 



40. H. fulvus Fabr. Orkney: Orpliir, one specimen. 



41. H. lineatocollis Marsli. Shetland, two specimens; Orkney, 

 at Stromness and Kirkwall, several specimens. 



Dytisciclae. 



42. Deronectes griseostriatus De Geer. Shetland, one specimen. 



43. Hydroporus erjrthrocephalus L. Shetland, numerous speci- 

 mens. 



44. H. pubescens Gyll. Shetland; Orkney; in abundance. 



45. H. memnonius Mc. Orkney: Stromness, 20. VII, two spe- 

 cimens. 



46. H. piceus Steph. Orkney: Stromness 20. VII, eight spe- 

 cimens. 



47. H. palustris L. Shetland; Orkney; nnmerons specimens. 



48. Cymatopterus fuscus L. Orkney: one specimen at Orphir, 

 17. VII. 



49. Agabus nebulosus Först. Orkney: Orphir, 17. VII, two 

 specimens. 



50. A. congener Payk. Orkney: Kirkwall, 15. VII, three spe- 

 cimens. 



51. A. guttatus Payk. Shetland, three specimens. 



52. A. bipustulatus L. Shetland, numerous specimens; Orkney, 

 at Kirkwall, 13. VII, five specimens. 



53. A. chalconotus Panz. Shetland, one specimen; Orkney, 

 two specimens. 



Liiniiel}iiclae. O 



54. Limnebius truncatellus Thunb. Shetland: Bressay, 13. VTI, 

 four specimens. 



OchtheMidae. O 



55. Ochthebius bicolon G-erm. Shetland, tvo specimens. 



^) The most specimens are long ago determined by D-.r D. Sliarp. 



16 



