I902 An Extinct Butter-fly 297 



extremely small, and can be completely withdrawn into the 

 second segment ; the body has the dorsal surface convex, 

 the ventral surface flat ; the divisions of the segments are 

 distinctly marked, the posterior margin of each slightly over- 

 lapping the anterior margin of the next, and the entire 

 caterpillar having very much the appearance of a Chiton; 

 the sides are slightly dilated, the legs and claspers are seated 

 in closely approximate pairs, nearly on a medio-ventral line. 

 The colour is green, scarcely distinguishable from that of the 

 dock leaf; there is an obscure medio-dorsal stripe, slightly 

 darker than the disc, and in all probability due to the pre- 

 sence of food in the alimentary canal." The same authority 

 describes the pupa as " obese, blunt at both extremities, 

 attached by minute hooks at the caudal extremities, and also 

 by a belt round the waist," while the colour is said to have 

 been first green, then pale ash, with a dark dorsal line and 

 two abbreviated white ones on each side. 



The perfect insect emerged towards the end of June or the 

 beginning of July, and was seen on the wing from that time 

 until the latter end of August. Mr Bond, who had " personal 

 acquaintance with living Dhpar,'' states that "they are very 

 active and shy, and would only fly when the sun shone ; they 

 would always settle on a thistle when they could find one in 

 bloom, flying off to attack any insect, no matter what, that 

 might come anywhere near them — not always returning, but 

 generally passing on to another place. It was very little use 

 following them if you missed your first stroke with the net, 

 as they went away like the wind and seldom let you get a 

 second chance ; indeed it is difficult to follow them, as keep- 

 ing your eyes on them and the boggy places was rather a 

 difficult job." Mr E. C. F. Jenkins, of Sleaford, informs us 

 in ' The Entomologist's Weekly Intelligencer ' (1859) that 

 on one occasion he took 16 specimens in half an hour on one 

 particular spot, Mr J. W. Douglas, writing to the same 

 periodical in 1859, says : " I made a pilgrimage to Whittle- 

 sea Mere in 1841, on purpose to see the beauties alive; but 

 it rained every day during the week I was there, and I only 

 saw a solitary specimen, which ventured to open its wings 

 during a transient gleam of sunshine. Now, whenever I 

 look at that butterfly in my cabinet, the recollection of the 



