TRIFID^. 283 



Donegal, Sligo, and probably in all suitable places, but not 

 very common and in some situations even rare. 



Besides the coasts there is one inland locality in which it 

 is plentiful — the extensive sandy district known as the 

 "Breck Sand" in the western portions of Norfolk and 

 Suffolk, round Thetford, Brandon, Bury St. Edmunds and 

 Tuddenham. These sands are supposed to have been the 

 ancient coast when the sea extended from the Wash over the 

 whole of the present Fen district, and here the present 

 species, with several of its coast companions, is still found. 

 There is a record of its occurrence even on the border of 

 Huntingdonshire. Casual specimens also find their way on 

 to the sandy heaths which lie near the sea in the neighbour- 

 hood of King's Lynn. 



Abroad it is widely distributed in Central, and especially 

 in Northern Europe ; also in the North of Italy, Corsica, and 

 the South of France. 



2. A. sufFusa, Hilh. ; ypsilon, Stand. 6'«^.— Expanse 

 If to 2 inches. 



Antennas pectinated. Fore wings very long, dull brown, 

 clouded to beyond the middle with dark brown ; outside the 

 reniform stigma is a distinct black wedge. Hind wings 

 shining greyish-white with dark nervures. 



Antennae of the male long and strongly pectinated with 

 solid ciliated teeth in nearly opposite rows, but tapering off 

 from the middle of the shaft, so that the apical portion, for 

 one-third of the whole length, is threadlike ; colour dark 

 brown. Palpi short, with strong separated tufts of scales on 

 the first and second joints, by which the third joint is almost 

 concealed ; dark grey dusted with blackish. Head tufted, 

 purplish-brown streaked with black ; eyes edged at the back 

 with mixed black and white lashes which are nearly 

 prostrate. Collar raised, brown, barred strongly in front 

 with black, above this paler purplish-brown; remainder of 

 thorax pale purplish-brown, or pale brown dusted with 



