ATLANTIC FORMS OF SYMPETRtJM STRIOLATUM, CHARP. 5 



believed to be from the island of Coll. In these the boundaries 

 of the middle field are heavily shaded, and the legs are narrowly 

 lined with yellow. Further, Mr. King reports two males from 

 the island of Islay (July 13th), which are of the true western 

 Scottish form, the lateral markings of thorax agreeing with 

 diagram No. 2, excepting that spot g is rather larger, the dark 

 boundary of the upper part of the field being narrow. 



Three examples from Tayvallich, in Kintyre, deserve special 

 notice (two males and one female, coll. A. M. Stewart, Paisley). 

 The tendency of the line at the base of the frons to go down- 

 wards is not so much pronounced, being more strongly marked 

 downwards in the female than in the males. The narrow 

 middle field of the thorax is distinctly outlined in fuscous, but 

 the diagonal line is less clearly developed (partly, I think, a 

 matter of age). Thoracic spots rather larger than in the northern 

 examples, but c, d, b always well separated by broad black 

 margins ; in one male a and b widely separated ; in the other 

 two connected by a narrow neck. The yellow spots on the 

 metasternum long oval, the yellow tails becoming definite long 

 wedge-shaped markings ; following these is an irregular semi- 

 circular black marking of varying breadth, the space enclosed 

 being yellowish, but tending to become fuscescent and probably 

 becoming blackish with age. In the males the narrow yellow 

 lines on the femora are distinct ; but in the female they tend to 

 become infuscated. Ventral surface of abdomen perhaps some- 

 what discoloured, but apparently not differing from the northern 

 specimens, and in great part black. 



The above are from the northern part of Kintyre, and they 

 constitute a natural link with the Irish forms. The extreme 

 southern point of the long peninsula of Kintyre is only a matter 

 of twelve and a half miles distant from the Irish coast, surely a 

 mere trifle to a migrating Sympetrum. 



From Emyvale, Co. Monaghan, Ireland, I have before me a 

 series of four males and three females. They are rather young, 

 but they have much in common with the Scottish forms. The 

 femora are lined with yellow, but the legs are over all darker 

 than in the typical forms. The thoracic lateral spots are variable 

 in size, but in some they are quite as small as in some of the 

 Scottish specimens ; a, b, c, d, e are completely isolated in all 

 of them ; the narrow middle field is always outlined in fuscous, 

 and in three of them (one male and two females) the diagonal 

 line is clearly marked. Six of these have more or less dark 

 shading at the side of the eye. 



By the very kind assistance of Mr. J. N. Halbert, I have been 

 able to examine a series of specimens obligingly lent by the 

 National Museum, Dublin, and originating from many different 

 points in Ireland. They are from the following localities, viz. : — 



Males (one from each locality) : — 1. Eostrevor, Co. Down, 



