A LIST OF THE DIPTERA MET WITH IN WESTER ROSS 227 



various papers on Diptera, records many species from 

 Inchnadamph, Loch Maree, etc., though generally his 

 localities are vague, such as " Land's End to Sutherland," 

 etc. Luckily some of these localities can be definitely run 

 down, as many of the specimens are to be found in the 

 British Collection at the Natural History Museum. 



My own collecting in the district was confined to two 

 localities — Lochinver and Inchnadamph, and at these two 

 places I collected steadily during the months of June and 

 July 191 1. The idea of making out a list of my captures 

 only came as an afterthought, so many more or less common 

 species were allowed to slip through my hands unrecorded. 



Wester Ross is not a rich district, and its comparative 

 poverty may be traced to various causes, the most important 

 being probably the want of woods, accompanied as that is 

 by a lack of variety in the local timber, consequently many 

 groups of species are badly represented, e.g., the frequenters 

 of felled logs and broad-leaved trees. The absence of sand- 

 dunes may account for the absence of many species- of 

 Therevidae, Anthomyidae, and Pipunculidae ; while the local 

 bogs do not appear to be of the attractive character of those 

 of Strathspey, Nairn, and Rannoch. Sutherland, however, 

 offers an interesting peculiarity in its dipterous fauna, and 

 that is the apparent isolation at Lochinver and Golspie of 

 colonies of southern species — species which as a rule had 

 been left behind far to the southward, and of which the 

 following may be cited as examples : — 



LOCHINVER: — i. Chrysops relictus (Nairn); ii. Isopogon 

 brevirostris ( Rannoch ) ; iii. Helophilus lunulatiis ( New 

 Forest) ; iv. Phortica alboguttata (New Forest). 



GOLSPIE : — i. Brachyopa bicolor ( Herefordshire ) ; ii. 

 Chrysochlamys cuprea (Nairn); iii. Rhingia camp est vis, 

 etc., etc. 



I am indebted to the following gentlemen for much kind 

 assistance in the working out of this collection, viz. — to Mr 

 Austen, for aid in the Muscidae and Tachinidae ; to Mr 

 Edwards, in the Nematocera ; and above all to Mr Collin, 

 who has checked my identifications, and in many» cases 



