188 



rjanuary, 



first made the journey from Edinburgh to Epping,* arrived on the 

 16th May safely at Meseritz. The indications of " frass " showed that 

 a few had partaken of food on the way. On the fresh food, which I 

 secured on the very day of their arrival, no trace of " frass " could be 

 observed, and yet one of them could not have been quite full grown, 

 as it only became a pupa on the 29th May. Can it have disliked the 

 Helianthemum grown on a sandy loam, and not on limestone ? 



The first turned to pupa the afternoon following its arrival ; it did 

 not fix itself by a thread, neither did the following ones ; but the fourth 

 fixed itself in a corner of the box with a weak thread round the middle 

 of the body. So it sat quite still, having become of an unicolourous 

 pale green, with apparently very deep-lying dorsal vessel. Each of the 

 four pupjB had the hinder extremity inserted in the cast-ofi" larva-skin, 

 which had become pale greyish-yellow, with yellowish bristles. 



The caterpillars are pale green, and amply covered with whitish 

 bristles. The dorsal vessel forms a considerably broad longitudinal 

 line, dark green, narrowed in the segments, fading away before the 

 end of the anal shield ; which line is laterally accompanied on each 

 segment by a swollen hump, apparently more thickly bristled. The 

 lateral swelling, deeply notched behind each segment, has a reddish- 

 white line, running lengthways, bordered on both sides with dark rose 

 colour, making the colour of the whole lateral swelling appear rose 

 colour when superficially viewed. This colour does not reach round 

 the anal shield, nor does it extend to the thoracic segments. Between 

 it and the dorsal sweUings pale faint lines descend from above obliquely 

 downwards and backwards. The ventral legs are somewhat paler than 

 the ground colour of the body ; the anterior legs are yellowish-brown, 

 their tips quite pale. The pupa is slightly polished pale green, on the 

 back darker and purer ; on the abdomen paler, and shading into 

 yellowish, on the wing-covers into whitish. The abdomen shows very 

 slender small yellowish bristles sparsely scattered ; on the face they 

 are somewhat longer, straight, and stiff; on the neck shorter, and 

 much sparser. Over each eye a blackish streak, curved backwards, 

 ranges from the upper border to the lower one. The dorsal vessel, 

 only visible on the abdomen, is dark grey, widened on each segment in 

 the middle, but it is not visible either on the first or last segment. The 

 lateral swQlling of the abdomen, which disappears under the wing- 

 cases, is very pale rose colour. Above it the spiracles appear as small 

 whitish raised dots. 



• We believe these larrae were forwarded from Scotland by Mr. Andrew Wilson, of Edinburgh — Eds. 



