248 



The NatuPvAList. 



sand-Mils the grass is perhaps that of shorter species, so that on it le&s 

 dew is deposited : or (as the amount of dew varies, of course, with the 

 quantity of watery vapour iu the air), it may be that its comparative 

 absence at the time the Lancashire hills were visited by Mr. Porritt, 

 was the reason why he found them, as he says, " perfectly dry." 



COXTRIBUTIOX TO A LIST OF THE DIPTERA OP 

 LANCASHIRE AXD CHESHIRE. 



(XORTH OF LANCASTER EXCEPTED). 



{Continued). 

 By Bexjn. Cooke. 



COXOPID^. 

 Conops aculeata. Warrington. 

 Myopa testacea. Stretford ; Marple. 

 M. ferruginea. Manchester; Cheshire coast. 



OESTRIDiE. 



Oestrus bovis. Hazelgrove. 



MUSCID^. 



Bucentes geniculatus. Common. 



Gonia capitata. Southport ; Cheshire coast. 



Tachiua grossa. Warrington. 



T. caesia. Common. 



T. detracta. Delamere. 



T. viridis. Hazelgrove. 



T. vulpina, Delamere. 



T. lateralis. Bowdon. 



T. simplex and conica. Southport. 



T. agilis. Delamere. 



T. larrarum. Southport. 



T. hadensis. Bowdon. 



T. leucocephala. Delamere. 



T. hortulana. Manchester. 



T. vulgaris. Manchester; Bowdon. 



T. notabilis. Delamere. 



T. spinipennis. Hazelgrove. 



T. antiqua. Manchester ; Bowdon ; Southport, 



Dexia volvulus. Manchester ; Hazelgrove. 



D. nigripes. Manchester ; Bowdon. 



