NOTES ON DIPTERA IN THE FORTH DISTRICT 49 



NOTES ON DIPTERA IN THE FORTH DISTRICT, 

 WITH ADDITIONS TO THE LIST. 



By A. E. J. Carter. 



The interesting paper by Mr Evans in the last number 

 of the Scottish Naturalist has renewed my interest in the 

 diptera of the Forth District, where I collected for a number 

 of years. As regards its dipterous fauna this district is 

 better known than any other part of Scotland, yet there are 

 a great many species still to record, and it is with the 

 view of advancing our knowledge, if only in a slight degree, 

 that these notes are drawn up perhaps, too, they may 

 help Mr Grimshaw's appeal for more workers. A wide 

 field for research lies open to any one in Scottish dipterology, 

 and it would afford the present writer much pleasure if 

 he could be of assistance to any student taking up the 

 subject. Much may be done by co-operation to ease the 

 initial difficulties : these over, the study is full of absorbing 

 interest, and discoveries await even the beginner. 



First, I have a few corrections of former records to 

 make : 



Mycetophila signafa, Mg., recorded from Aberfoyle in E/tf. 

 Mo. Mag., 1906, p. 182, and A.S.JV.ff., 1906, p. 155, should be 

 giittata, Dz. M. signata has been split up into four species ; $ ^ 

 can be separated by an examination of the hypopygium, but ? ? 

 appear to be indistinguishable. I can record guttata also from 

 Callander, 3rd June 191 6. 



Mycetophila lunata^ Mg., from Polton in Ent. Mo. Mag., 

 1907, p. Ill, should be luctuosa, Mg. (hypopygium examined). 



Corethra plumicornis, F., from Pentland Hills, in Etit. Mo. 

 Mag., 1906, p. 181, I have since determined as fusca, Staeg. 

 Mr Edwards agrees, but thinks the latter is perhaps only a dark 

 variety of pluinicomis. The two forms are very different in 

 appearance, especially in the ^ , but the hypopygia seem to be 

 similar. 



The presence of a number of species in the "Forth" 

 99 AND 100 G 



