THE WHITE LETTER HAIR-STREAK. 103 



Preston ; Valley of the Dovey, Montgomeryshire ;' 

 Cardiff, S. W. ; Barnwell Wold ; Peterborough ; Col- 

 chester ; Epping ; Darenth Wood ; Coombe Wood ; 

 Brighton ; Tenterden ; Winchester ; Woolmer Forest, 

 Hants ; Plymouth ; Dartmoor ; Wallingford, Berks ; 

 Ipswich ; Dorsetshire ; Norfolk ; Wiltshire ; Monks 

 Wood, Cambridgeshire. 



THE BLACK HAIK-STEEAK. 

 (Theda Pruni.) (Plate XII. fig. 2.) 



THE upper side is very dark brown, sometimes almost 

 black, and bearing near the hinder edge of the hind 

 wings a few orange spots. This character will at once 

 distinguish this from the next species (W. Album). 

 On the under side of the hind wing is a broad band of 

 orange, having a row of black spots on its inner edge. 



The caterpillar is green, with four rows of yellow 

 spots. It feeds on the sloe. 



The butterfly comes out about the end of June or in 

 July. It is generally a very rare insect, but is occa- 

 sionally taken in great plenty in certain spots. The 

 Rev. W. Bree, writing to the Zoologist from the neigh- 

 bourhood of Polebrook, North Hants, says, " Theda 

 Pruni is very uncertain in its appearance. In 1837 

 it literally swarmed in Barnwell and Ashton Wolds ; I 

 do not scruple to say that it would have been possible 

 to capture some hundreds of them, had one been so 

 disposed ; for the last few years it has appeared very 

 sparingly indeed." It has also been found in the fol- 

 lowing localities : Overton Wood; Brington, Hunting- 

 donshire; and Monks Wood, Cambridgeshire. 



THE WHITE LETTEE HAIE-STEEAK 

 . (Theda W. Album.) (Plate XII. fig. 3.) 



THIS is very much like the last in appearance, and 

 has often been mistaken for it by inexperienced eyes. 

 The points of difference are on the upper side, the 

 absence of the orange band at the hinder edge of the 



