'42 ;-'"iy, 



twelfth and tbirteentli ; on cacli ridge of the back, a row of roundish 

 spots, and, a little lower on the side, a row of squarish spots, and, lower 

 again, in the spiracular region, a row of roundish spots placed at the 

 segmental divisions ; on the fifth segment, the upper markings thicker 

 and running together. 



About four or five days before changing, the larva ceases to feed, 

 becomes of a dingy olivaceous-pink or mouse colour, and spins a fine 

 layer of silk as a foot-hold, and a stout thread as a cincture, crossing 

 the front of the third segment, and strengthened near the base on 

 either side by two other short threads joining it, and thus forming 

 triple moorings. 



In each instance, I found the operation of changing to a ])U])a 

 had brought the cincture away from its resting place on the larva to 

 below the thorax of the pupa, so that this thread, at first slanting 

 forwards from the base over the larva, slanted now a little backwards 

 over the pupa. 



The pupa is about tb inch in length, and z\ inch in width, of a 

 dumpy figure, thickest at the middle of the abdomen, with the head and 

 thorax rounded, and the latter very slightly keeled : a depression occurs 

 between the thorax and abdomen, where the cincture passes and holds it 

 secure ; from thence, the abdomen swells out full and arched towards the 

 bluntly rounded anal end ; the wing-covers are long in proportion, but 

 not at all projecting. In colour, it is pale brownish-ochreous, with a 

 blackish-brown thin dorsal line marking the thoracic keel, and on the 

 abdomen a series of rather blotchy arrow-head dorsal dashes, and a 

 sub-dorsal series of larger dark brown blotches, that nearest the thorax 

 made conspicuous by the segment next below being without one ; the 

 thorax is marked with oblique rows of brown freckles directed 

 from the sides of the head towards the end of the keel at the depres- 

 sion ; the eye-covers are blackish ; the wing covers pale greyish with 

 rays of brown freckles, and outlined with a thin brown edging, their 

 surface smooth, rather more glistening than the other parts, which are 

 thickly studded with fine, short, brownish bristles. 



Erasworth : June \2th, 1876. 



P.S. — It may be mentioned that eggs were laid during the last 

 month by a female Argioliis, in captivity, on holly, and also on young 

 shoots of ivy, and that both Mr. Hellins and I find that the larva? 

 eating ivy are more advanced than those feeding on holly. 



