LIST OF ANTS OF THE FORTH AREA 105 



data for a comprehensive account of the Aculeate Hymenop- 

 tera of the district which I have for some time had in hand. 

 In general, localised records will not, I understand from Mr 

 Donisthorpe, be given in his paper, but only a list of 

 the counties and vice-counties in which each species is known 

 to have occurred. Unfortunately it not infrequently happens 

 that a county is partly in one drainage area and partly in 

 another. Thus, while the corner of Berwickshire north of 

 St Abb's Head lighthouse is in " Forth," all the rest of the 

 county is in " Tweed." Similarly, fractions of Peeblesshire at 

 Portmore Loch and Carlops are in " Forth." On the other 

 hand, a corner of Midlothian (Edinburgh) has to be conceded 

 by " Forth " to " Tweed." Then, Stirlingshire falls to be 

 divided between " Forth " and " Clyde," and Fife between 

 " Forth " and <l Tay." In the following list the Watsonian 

 numbers therefore signify in these instances only the portions 

 of the counties lying within the boundary-line of" Forth." 



Reckoning as species — which some authorities consider 

 they are — the five forms covered by the old name Myrtnica 

 rubra (L.), it will be seen that we have eleven species of 

 Ants in the Forth area. The " hill " Ant {Formica rufd) 

 occurs only in the western or Perthshire, that is to say, the 

 Highland section of the valley, and one or two others appear 

 to be very local. The rest are all common and widely 

 distributed, Formica fusca and Myrtnica ruginodis having been 

 taken in each of the eight comital divisions. Lasius umbratus 

 race mixtus is as yet somewhat of a puzzle to me ; I have so far 

 met with it only in company with, or in the neighbourhood of 

 L.flavus, a fact which seems to stand in need of explanation. 



As an introduced species Monomorium pJiaraouis (L.) has 

 on several occasions made its appearance in Edinburgh 

 hotels, and a number of other foreign Ants occur in hot- 

 houses, but these form no part of our fauna. 



List of Species, with Localities. 



Note. — 81 = Berwickshire, 82 = Haddington, 83 = Edinburgh, 84 -L : nlithgow, 

 85 = Fife and Kinross, 86 = Stirling, 87 = S.W. Perth and Chckmannan,78 = Peebles. 



Formica rufa, Linn. 

 87. Aberfoyle and Loch Ard side, Pass of Leny, Trossachs, and 



5 o 



