ogo [December, 



Linear, parallel-sided, seolopendroid, capable of very considerable extension. 

 Length, 18 mm. Breadth, 2 mm. : measurements taken when the larva vras 

 quiescent. Antennae, 1st joint, creamy-white; 2nd and 3rd reddish-testaceous; 

 head reddish-testaceous. 



Upper surface : segment 2, yellowish-testaceous with a small rectangular 

 blackish patch on each side ; 3-12 same as segment 2, but with blackish patch much 

 larger, leaving only a central line yellowish-testaceous. 



On segments 5-12 there is on each side a double row of large tubercular projec- 

 tions, creamy-white in colour, forming a succession of V's, at the base of each of 

 which, on the inside, a spiracle is placed. These tubercles are armed with long 

 spiny setae of a reddish-testaceous colour. The spiracles are also defended by 

 similar outstanding setae. Under-side, creamy-white with two black streaks on each 

 segment. 



The 13th segment is produced in a downward direction forming an ambulatory 

 stump, and has on each side a tubercular projection, horizontal with a backward 

 direction. 



Westwood apparently bad not a specimen before bira wben be 

 made tbe figure and drew up tbe description, for be erred in placing 

 tbe tubercular processes on tbe under-side. In tbe specimen from 

 wbicb tbe above description was drawn up tbe lower process of tbe 

 V was borizontal, the upper at an angle witb it of about 45°. 



Wben tbe larva bad tbrust itself halfway into tbe shell the spiny 

 setae seemed to cause tbe Helix very great annoyance, forcing it to 

 shrink from contact with them and so enabling tbe larva to press in 

 still further. The Helix then threw out a quantity of slime, but this 

 was kept from tbe spiracles by their setae, and also by the processes 

 themselves and their setae. It was thus impossible for tbe Helix to 

 23ress its body or force its slime upon the spiracles of its enemy and 

 so smother it. 



By the 7tb the snail appeared to be almost wholly consumed. 

 The abdomen of the larva was now distended to an enormous extent, 

 so much so, that the normally upper surface (wbicb being of a barder 

 consistency was incapable of lateral expansion) bad become tbe 

 central half of the upper surface. Tbe tubercular processes bad, of 

 course, been forced round from dorso-lateral to dorso-central posi- 

 tions ; the upper ones, once at 45°, were now vertical; the lower ones,, 

 formerly borizontal, were now at 45°. The binder portion of the 

 larva, for that was all of it that could now be seen, even when some off 

 tbe shell had been snipped away, looked mucb like an Oniscus ini 

 general outline, and had also assumed a mucb darker colour. The 

 rejectamenta was a deep yellowish liquid having a strong fishy odor. 



From this date no movement except a slight contraction of the 

 segments at intervals was noticed. 



Although I looked at it daily I was not fortunate enougb to seei 

 the change to tbe pupal state. Apparently it was in this state less' 

 than 24 hours, and emerged as a fine female on May '20th this year. 



2, Rockingham Street, Barnsley. 

 October, 1906. 



