178 mason: diptera of the alford district. 



Syrphus bifasciatus F. Well, two, June 10th and 16th, 1888 ; 



J.E.M. (G.H.V.). 



Syrphus balteatus Deg. Alford district, eleven (C.O.W.). 

 Baccha obscuripennis Mg. Rigsby, September 13th, 1886 j 



J 



campestris Mg. Well, June 5th, 1887 ; J 



Volucella pellucens Geoff. Claythorpe, July 6th, 1887 ; J 

 (E.B.). 



Volucella bombylans L. Well, one, June 10th, 18S8; J 



(G.H.V.). 



1 



Eristalis tenax L. Greenfield, three, June 8th, 1887 ; J 



(E.B.). Alford, September— December, 1886; J.E.M. (. 

 Alford district, one (C.O.W.). 



Eristalis arbustorum L. Rigsby, September 13th, 18: 



(E.B.). Mumby Chapel, August 1887 ; J.E.M. (E.B 



Eristalis intricarius L. Mumbv ChaDel. both sexes. 



J 



J.E.M 



July 



Helophilus 



August 1887 ; J 



(no authenticator's initials). 



Xylota segnis L. Greenfield, June 8th, 1887 ; J 

 Syritta pipiens L. Alford, September 1st, 188/ 



J 



June 10th and 16th, 1888; J.E.M. (G.H.V.). Alford 



district, one (C.O.W.). 



Fam. DEXIDAi. 



Thelaira leucozona Pz. Mablethorpe? one, August 18th, 1888; 



J.E.M. (G.H.V.). 



Fam. SARCOPHAGIDs-E. 



Sarcophaga carnariaL. Alford, one, August 28th, 1888 ; J.E.M 



(G.H.V.). 



Fam. MUSCID.-E, 



Calliphora erythrocephala Mg. Mumby Chapel, one, July 



31st, 1888; J.E.M. (G.H.V.). 



Pollenia rudis F. Rigsby, two, April 3rd, 1887; J.E.M. (E.B.)- 

 Alford, December 29th, 1886 ; J.E.M. (E.B.). Claythorpe, July 

 6th, 1887 ; J.E.M. (E.B.). Well, one, June 16th, 1888 ; J.E.M- 

 (G.H.V.). 



Musca corvina F. Chapel, August 1887; J.E.M. (E.B.). 

 Morellia hortorum Fin. Mumby Chapel, May 26th, 1885 : 



J.E.M. (E.B.). 



I* 



Natural 



