39 
a female from the same locality, presented by the Entomological 
Club, in 1844 ; and a second female, taken at Marcha, near Yakutsk, 
Siberia, on June 7th, 1900. According to Brauer, 77/. borealis ranges 
from Lapland and Sweden to the Austrian Alps. 
Therioplectes montanus, Mg. 
Plate 14. 
In British specimens of this species there is a considerable 
difference in appearance between the two sexes, due partly to the 
male abdomen being mure pointed at the tip (as is also the case in 
other species), and partly to the contrast of colours in the abdomen 
being much sharper in the male than in the female. Of three males 
of Th. montanus in the Museum collection, from Loo Bridge, Co. 
Kerry, Ireland, the smallest is 12, the largest 13! mm. in length ; the 
length of seventeen Scotch and Irish females varies from 12 to 
14^ mm. Continental specimens are larger, and may attain a length 
of 16 and 17 mm. in the case of the male and female respectively. 
The area of enlarged facets in the upper portion of the eyes of 
the male is not sharply distinguished from the remainder of the 
eye-surface. Brauer {loc. cit., pp. 144-145) describes the coloration 
of the eyes of the male as " green, with three purple bands and red 
lower margin borderincr the face"; while, with reference to the female 
he writes : " Eyes emerald-green, with three linear carmine-red 
bands, the middle one of which often does not reach the hinder 
margin of the eye ; upper and lower margin emerald-green." 
So far as regards the British fauna, T/i, montanus would appear 
to be essentially a Scotch and Irish species, since the Museum 
collection includes no specimens from England .or Wales. Colonel 
Yerbury's note runs : " Very common in Ireland, at Loo Bridge and 
other places in County Kerry ; common, too, in Scotland, where in 
July it succeeds 77/. luridus in the sand-hills ; it also occurs, among 
other localities, on the lower slopes of the Cairngorms." The Scotch 
specimens in the Museum are from Invershin, Sutherland; Nairn; 
Brodie, Elgin ; Nethy Bridge, Inverness-shire ; and Rannoch, Perth- 
