272 Wijigate : Durham Diptera. 



F^am. PTYCHOPTERID.'E. 



Ptychoptera contaminata L. Hesleden, one S, Aug-. 1899; Waskerley, 



one 6 , April 1901. 

 Ptychoptera lacustris Mg. Bedburn, one 9, July 1902, 

 Ptychoptera albimana F. South Durham, three <5 s, 1899. 

 Ptychoptera SCUtellaris Mg. Bishop Auckland, one 6 , June 1902. 



Fam.. LIMNOBID^. 

 Limnobia quadrinotata Mg. Gibside, one 6 ■ 

 Limnobia nubeculosa Mg. Bishop Auckland, one S and one ? , May 



1900; Harperley, one c5 , June 1900; Raby, three (5 s and two 9 s, May 



1901 ; Barnard Castle, one ? , June 1901. 

 Limnobia flavipes F. Shipley, one S, April 1898; Hesleden, one i and 



two 9 s, June 1902. 

 Limnobia tripunctata F. Shipley, one S , April 1898 ; Hesleden, one S 



and two 9 s, Aug-. ; Bishop Auckland, two 6 s and two 9 s, June 1902. 

 Limnobia trivitta Schni. Hesleden, four Ss and four 9 s, Augf. 1901. 

 Dicranomyia modesta Mg. Bishop Auckland, one S and one 9 , June 



1902. 

 Dicranomyia chorea Mg. Common everywhere. 



Dicranomyia dumetorum Mg-. Hesleden, two S s and one 9 , Aug-. 1902. 

 Rhiphidia maculata Mg. Bishop Auckland, two S s and one 9 ; Shall, 



one S : Raby, one 9 ; Wearhead, one 9 » June-Sept. 1897-1901. 

 Antocha opalizans O.Sack. Bishop Auckland, one S , June 1902. 

 Empeda flava Schum. Bishop Auckland, one S , June 1902. 

 Empeda nubila Schum. Bishop Auckland, two 6 s and two 9 s. May 1902. 

 Oonomyia, apparently two species, possibly tenella Mg. and SCUtellata 



Egg-. Hesleden, <5 s and 9 s, Aug. 1902. 

 Acyphona maculata Mg. Hesleden, one i and one 9 > Aug. 1902. 

 Molophilus appendiculatus Staeg. Bishop Auckland, Harperley, Hesle- 

 den, four 6 s and four 9 s, June-Aug. 1902. 

 Molophilus propinquus Egg. South Durham, one 6 ; Brancepeth, one 



9 , June 1902 ; Hesleden, two 9 s, Aug. 1902. 

 Molophilus bifilatus Verr. Hesleden, one 6 , Aug. 1900. 

 Molophilus obscurus Mg. South Durham, one S ; Hesleden, one 9 , 



Aug. 1902. 

 Rhypholophus lineatus Mg. Stanhope, two S , May 1900. 

 Rhypholophus nodulosus Mcq. Bishop Auckland, one S, May 1900; 



Hesleden, one i, Aug. 1900; Stanhope, one 9, May 1900, common. 

 Rhypholophus varius Mg. Wearhead, two 6 s, Aug. 1900. 

 Rhypholophus hoemorrhoidalis Ztt. Wearhead, one i, Aug. 1901. 

 Erioptera flavescens Mg. Wearhead, one S , Aug. 1901 ; Brancepeth, 



one S and three 9 s, June 1902. 

 Erioptera macrophthalma Lw. Hesleden, one 9 , June 1900. 

 Erioptera taenionota Mg. Bishop Auckland, May 1900. 

 Erioptera fuscipennis Mg. Bishop Auckland, four s s, May 1900. 

 Erioptera trivialis Mg. Wearhead, four 6 s, Aug. 1901 ; Hesleden, one 



9 , Aug. 1899. 

 Lipsothrix errans Wlk. Belburn, one 6 and one 9 , June 1898. 

 Idioptera pulchella Mg. Wearhead, two 6h, Aug. 1901. 

 Dactylolabis gracilipes Lw. Harperley, two S s, June igoo. 

 Limnophila Meigenii Verr. Waskerley, one 9, July 1901. 

 Limnophila dispar Mg. Harperley, three J s, June 1900. 

 Limnophila lineola Mg. South Durham, one 9 . 



Naturalist. 



