250 LEPIDOPTERA. 



Worcestershire, Warwickshire, Derbyshire, Cheshire, Lin- 

 colnshire, and Yorkshire ; in the latter county very local. 

 I have no record further north in England, but in the south 

 of Scotland there is a single record by Dr. F. B. White, of 

 its occurrence in the Solway district. Probably throughout 

 South Wales, since it has been found in the Swansea district, 

 and in Pembrokeshire rarely. In Ireland it is recorded from 

 Dublin, King's County, Galway, Sligo, and Donegal. The 

 difficulty found in ascertaining its accurate range is increased 

 by a misleading common name — it has erroneously been 

 called the "Dark Dagger," and consequently there is reason 

 to fear that some of the local records are merely of dark 

 varieties of the nest species. 



Abroad it is widely distributed in Central Europe and the 

 temperate portions of Northern Europe, as well as in 

 Northern Spain, Bulgaria, Southern Russia, and Siberia. 



7. A. psi, L. — Expanse, 1| to If inch. Very like A. 

 tridcns ; of a rather colder grey ; the second line makes a 

 broader and more squared bend when turning in toward the 

 costa. 



The description of A. tridcns is also that of this species, so 

 very nearly that the only advantageous course appears to be 

 to point out the slight distinctions. The thorax and abdomen 

 in the present species seem to be slightly more robust and 

 the shoulders a little more squared ; fore wings slightly 

 broader and more triangular ; the ground colour of a colder 

 grey — devoid of either pinkish or yellowish tone — but vary- 

 ing from whitish-grey to shades very much darker than are 

 observed in A. tridcns. The second line of the foi'e wings, at 

 its origin on the costa, runs at first more parallel with that 

 margin, and so, as it bends, makes a broader and more 

 squared curve above the middle of the wing. Costal spots 

 usually rather less distinct. In the female the hind wings 

 are often more smoothly and generally suffused with brownish- 

 grey, which in sonie instances is quite dark, 



