TANYTARSUS SIGNATUS, A NEW BRITISH FLY 257 



TANYTARSUS SIGNATUS, V. D. WULP, A New 



British Fly. 



By Percy H. Grimshaw, F.R.S.E., F.E.S. 



On the 7th July last, while collecting on the roadside at 

 Loch Ossian, Corrour, West Inverness-shire, I came across 

 swarms of tiny midges, which, upon examination, proved to 

 be Tanytarsus signatus, Van der Wulp, a species not only 

 new to the British fauna, but one about which little has 

 been written. Indeed the only references I have been able 

 to find are the original description by Van der Wulp in the 

 second volume of the Tijdschrift voor Entomologie (1859) and 

 another by the same author in his Diptera Neerlandica 

 (1877). Since both these accounts are in the Dutch 

 language and not very accessible to the ordinary worker, it 

 may be useful to give here a new and original description 

 in English, together with a simple figure showing the 

 characteristic markings. I have also added an outline 

 drawing of the male genitalia, which may be of service at 

 some future date, when our native Tendipedidae are more 

 carefully studied. 



$ Head pale green, palpi light yellowish, eyes black, antennae 

 with brownish black basal joint and pale brownish plume. Thorax 



Fig. 1. Fig. 2. 



pale green ; on the dorsum two black longitudinal stripes which in 

 the anterior third are straight, parallel, and only separated by a very 

 narrow line of ground-colour (see upper drawing in Fig. 1), while in 

 35 2 K 



