76 DURHAM DIPTERA 



XII. 117. 



2 (1). No dark spot at the base of 0.5 1 : size 6-8 mm. 

 745. Dactylolabis gracilipes, Lw. 

 Harperley, 2 $, 4-6-00. 



118. Pcecilostola, Schin. 



1 (2). Legs dark brown, the basal half of the femora orange. 



14-16 mm. (746. punctata, Schrk.) 



2 (1). Legs yellow with only the tips of the femora and the 



bases and tips of the tibiae black. 10-14 mm - 



(747. pictipennis, Mg.) 



119. Epiphragma, O-Sack. 

 Life history unknown. 



Epiphragma picta, F. 



Deepdale, 1 $, 26-6-01. 



This specimen is peculiar. On one wing there is an 

 extra X-vein, X.2.b. dividing 0.2.b. into two ; and 

 on both wings there is a short recurrent vein at 

 the sharp bend of V.2., which almost divides 

 0.4 1 into two. 



120. Limnophila, Mcq. 



The life history of a few species is known. 



1 (18). X.2. at the end of V.l.b. 



2 (15). V.2 1 never more than twice as long as V.2 2 , often 



only about as long. 



3 (14). Fork of V.4.a. not more than twice as long as the 



handle, i.e., V.4.a 3 at least half as long as V.4.a.a. 



4 (6). Blackish grey species. 



749. Limnophila meigenii, Verr. 

 Waskerley, 1 $, 5-7-01. 



5 (4). Yellowish species. 



6 (13). Thorax with a central black line, at least in front. 



7 (10). Stigma distinct, though not conspicuous. 



