ORANGE-TAILED CLEARWING. 353 



is of comparatively large size, and may be distinguished from 

 the next species by the yellow belts on its body, and the 

 chestnut coloured tuft at the tail. (Plate 154, Fig. 2.) 



White-barred Clearwing {Sesia sphedformis). 



Although generally smaller, some specimens run very close to 

 the last species in size. It may be distinguished by the single 

 belt on the body and the black tail (Plate 154, Fig. 3). One of 

 the best known localities for the species in England is Tilgate 

 Forest, in Sussex ; but it also occurs in Hampshire (Basing- 

 stoke), Hereford (Tarrington), Worcestershire (Wyre Forest) 

 Staffordshire (Burnt Wood), Cheshire (one, Delamere Forest, 

 1901), Denbighshire (Llangollen), Lancashire (Chat Moss), and 

 Yorkshire (Bishop's Wood, 1894). 



The caterpillar feeds in stems of alder, and is full grown in 

 May of the third year after hatching from the Q'g^. It is said 

 that the chrysalis may sometimes be found by bending and 

 twisting the stems of alder, so as to cause the thin skin of bark 

 over the exit hole of the burrow to crack, and so disclose its 

 whereabouts. The burrow is generally low down the stem. 

 The moth is out in June and early July, and is sometimes to be 

 seen on sunny mornings at rest on alder leaves, or flying over 

 and around the bushes. 



Orange-tailed Clearwing {Sesia andre?icsfor?ms). 



Although known to be a British species since 1829, when a 

 specimen was taken in a wood near Greenhithe, Kent, this 

 insect continued to be very rare until quite recently. For a long 

 time the caterpillar was supposed to feed in the stems of dog- 

 wood, but it is now known to live in the stems of the wayfaring 

 tree ( Vibwnum luntana), and several specimens of the moth 



Series II. 2 a 



