294 



MASON : LINCOLNSHIRE HEMIPTERA-HETEROPTERA. 



Salda pilosella Thorns. IVIumby Chapel ; outmarsh, abundant 

 on the mud by the brackish water, July 1887. Also South 

 Ferriby (T. V. Wollaston, Brit. Hem., 528). 



Salda orthochila Fieb. Not yet recorded for Alford district. 

 Spridlington (T. V. Wollaston, Brit. Hem., 522). 



Salda saltatoria Linn. Mumby Chapel ; outmarsh and delph 

 banks; affects mud less than S. pilosella ; common, July 1887. 



Salda cincta H.-Schff. Mumby Chapel; outmarsh, one, 25th 

 July, 1887. 



HYDRODROMICA. 

 HVDROMETRID-E. 



Hydrometra stagnorum Linn. Alford, Well, Mumby Chapel. 

 Common on stagnant water. 



Gerris thoracica Schum. Generally distributed and common. 

 Gerris gibbifera Schum. Alford; one, 2nd April, 1885. Rigsby- 

 with-Ailby; one, 7th July, 1886. 



Gerris lacustris Linn. Generally distributed and common. 

 Gerris odontogaster Zett. Sutton-le-Marsh ; delph, one, i6th 

 April, 1886. 



Gerris argentata Schum. Farlesthorpe, brick-pit; two, 14th 

 May, 1887. 



Microvelia pygmaea Duf Well ; three, undeveloped, 30th 

 May, 1888, Chas. O. Waterhouse. 



Velia currens Fab. Generally distributed and common on all 

 running water. 



CRYPTOCERATA. 

 NEPID.E. 



Nepa cinerea Linn. Generally distributed. One, walking on a 

 drain-bank among reeds, Mumby Chapel, 25th July, 1887. 



NAUCORID.E. 



Naucoris cimicoides Linn. Not recorded for Alford District. 

 Lincoln ; Arboretum ponds (W. W. Fowler). 



XOTONECTID.E. 



Notonecta glauca Fab. Common in all stagnant water. 



Var. maculata Fab. Lincoln ; Arboretum ponds (W. W. Fowler). 



Naturalist, 



