THE SCOTTISH SPECIES OF THE GENUS HEMEROBIUS 31 



The following are the species known from Scotland : 



H. nervosus, F., is widely distributed in Scotland, and is usually 

 rather common, especially where there is natural birch in quantity. 

 It is probably the betulinus of Strom, an older name. 



H. subnebulosus, Steph., is very abundant near houses, and is the 

 Hemerobius of Edinburgh gardens. 



H. mortoni, M'L., just described from a pair found at Rannoch 

 in June 1898, is evidently not rare in the alpine and boreal regions 

 of Europe. It is remarkable that it should have remained so long 

 unnoticed, or at least undescribed, by Continental entomologists. 



H. marginatus, Steph., is locally common, probably over the 

 whole of Scotland. Like H. nervosus, it is fond of birch trees. I 

 have seen it in many localities from Wigtownshire to Inverness. 



H. liitescens, Fab., was at one time mixed with If. humuli, and 

 afterwards confused with H. orotypus, Wallengren. All the published 

 Scottish records under the last-mentioned name refer to lutescens. 



H. humuli, Linn. As indicated, two species were mixed under 

 this name. I think recent records, at least, will refer to what is here 

 called humuli. 



H. orotypus, Wall. This species is still little known, and is, no 

 doubt, confused by Continental entomologists with some of the allied 

 forms. Authentic Continental records are, however, confined to 

 Scandinavia and the Pyrenees. In the British Isles it has been 

 taken in Yorkshire, on Exmoor, and in Ireland, as well as in several 

 Scottish localities. It may have been referred to previously without 

 name, but no definite records of its occurrence in Scotland exist 

 prior to those mentioned at page 189 ante. 



If. stigma, Steph., is common wherever there are conifers. The 

 records are under the name of H. limbatus. 



H. pini, Steph. The distribution of this species is uncertain. 

 I have taken it in Lanarkshire, and it may be general, but perhaps 

 not common. 



H. atrifrons, M'L., has been recorded from Inverness-shire. It 

 also occurs in the south, as I took a specimen from Juniperus near 

 Cockburnspath in Berwickshire. 



The last-mentioned two species constitute, with H. limbatellus, 

 Zett. (not yet known from Scotland), a very closely allied group. 

 It may be that they are really forms of one protean species. 



H. nitidulus, Fab., and H. micans, Olivier, are rather common 

 in many localities. 



The only Scottish species not yet dealt with by Mr. M'Lachlan 

 are H. inconspicuus, M'L., and H. concinnus, Steph. 



H. inconspicuus has been found in Lanarkshire, Perthshire, and 

 Inverness-shire, but is usually not common. 



H. concinnus is not rare in the pine forest districts of the North, 

 where its striking variety quadrifasciatus, Reuter, is also found. 



