1914.] 



59 



belong to S. decoloratum. This peculiar pale, sand-coloured insect 

 would be an interesting addition to the fauna of Europe. 8. vulgatwm 

 is not known from the Iberian peninsula save as represented by these 

 two doubtful examples, and it is much to be desired that this problem 

 may be solved by some one of our entomologists who now so frequently 

 visit Spain. 



13, Blackford Road, Edinburgh : 

 January, 1914. 



A REMARKABLE CASE OF VENATIONAL TERATOLOGY 

 IN DIPTEBA. 



BY F. W. EDWARDS, E.A., F.E.S. 



(Published by permission of the Trustees of the British Museum). 



The accompanying figures represent the normal venation (A) and 

 the left (B) and right (C) wings of an abnormal individual of Tachy- 

 clromia articulata, Mcq.* Flies with one or two accessory veinlets are, 

 of course, of common occurrence, but nothing approaching the speci- 

 men figured has, so far as I am aware, been put on record. It is 

 noteworthy that in both wings of the abnormal individual the anal 

 vein curves forwards and ends in the cubitus in a manner unknown in 

 Empidse, but curiously suggestive of Lonchopteridee. 



The abnormal specimen occurred among a series taken by Lt.-Col. 

 Yerbury, at Porthcawl, Glamorgan, in June, 1906. The specimens 

 had been determined by the late Mr. G-. H. Verrall. 



T. articulata, normal. 



T. articulata, left wing 

 February, 1914. 



T. articulata, right wing. 



* T. articulata, Mcq., in the Verrall Collection is probably amnulvprn, Meig. — J. E. C. 



