BRITISH BUTTERFLIES. 



tion of equal bulk, and rounded at either end, 

 hairy, and of a duii bluish-green colour, its 

 powers of locomotion of the very feeblest 

 description. By the third of May they had 

 become rather more than a line in length and 

 of a drab colour, and hairy like the leaflets 

 on which they were feeding. By the 29th of 

 May they had grown to about a quarter to 

 three-eighths of an inch in length, eating, not 

 through the leaflets, but only the green cuticle. 

 At this time they were of a deep yellowish 

 gray, and the dorsal stripe blackish olive, 

 edged with whitish, and a whitish stripe along 

 the lateral ridge above the legs; the sub-dorsal 

 stripe being triple, i.e., two lines of blackish- 

 olive with a whitish-gray one between them ; 

 the surface generally studded with minute 

 blackish points, each bearing a fine short hair-. 

 From the llth to the 15th of June they had 

 all assumed their last coats. The full-grown 

 caterpillar is about seven lines long, thick in 

 proportion, and of the usual onisciform or 

 Lyccena shape. The head is small, and re- 

 tracted when at rest or alarmed, the second 

 segment the longest, rounded, and very slightly 

 flattened above; the others, as far as the tenth, 

 have raised prominences on each side of the 

 back, and a dorsal hollow between them, the 

 sides sloping to the lateral ridge ; the ventral 

 surface is rather flattened ; the legs all placed 

 well underneath. The last three segments 

 are without dorsal ridges, and slope gradually 

 to the sides and anal extremity ; their sides 

 are rather concave, and there is a very promi- 

 nent wart on each side of the twelfth ; the 

 segmental divisions are not observable on these 

 last, but are well cut on all the others. In 

 colour the caterpillar is now a bright yellow- 

 green, with the dorsal stripe blackish-brown, 

 edged with whitish from the beginning of the 

 third to end of the tenth segment; it is widest 

 on the third and fourth, being on them of a 

 rather rounded lozenge form, with a whitish 

 dot near tho edge on each side; there is a dull 

 dark brown small plate in front of the second 

 segment, and a broad semi-lunar-shaped blotch 

 of the same colour a little behind, and divided 

 in the middle by a fine line of the green 

 ground colour. The dorsal stripe on the 



eleventh segment becomes broad and squarish, 

 but resumes its linear shape on the twelfth 

 and thirteenth. The sub-dorsal stripe is visible 

 from the beginning of the third to the end of 

 the eleventh segment as a greenish-yellow line 

 running between two green ones darker than 

 the ground-colour. At the bottom of the 

 sides along the lateral ridge, commencing on 

 the third segment, and continued round the 

 anal extremity, is a whitish line. Between 

 the dorsal and sub-dorsal stripes, on all the 

 segments from the third to the tenth both in- 

 clusive, are faintly paler oblique lines of 

 yellow -green, viz., one on each segment sloping 

 downwards and backwards ; the warts on the 

 twelfth segment are very often suddenly pro- 

 jected considerably, and then a circle of fine 

 short hairs is visible on their extremities 

 The surface of the body is also clothed with 

 similar hairs ; the head is black, having the 

 base of papillae and a streak across over the 

 mouth of buff colour. They had all turned to 

 chrysalids by the 24th of June, one of them 

 slightly attached to a stem of the plant by the 

 anal extremity, and lying like the others, 

 amongst a few loose threads at the very bottom 

 of the stems, and partly in the earth. The 

 CHRYSALIS is about five lines long, smooth but 

 without polish, the top of the head slightly 

 projecting, the thorax rounded, the body 

 plump, curving on the back outwards and 

 backwards towards the tip, which is hidden 

 in the caterpillar skin ; the wing-cases are 

 prominent and long in proportion ; it is of a 

 dull green tint, with a dark brown dorsal line 

 of arrow-head marks." Buckler. 



TIME OF APPEARANCE. From the beginning 

 to the third week in July. 



LOCALITIES. It seems to be one of those 

 species which, from their inconspicuous cha- 

 racter, are very likely to be overlooked ; and 

 hence its range is very imperfectly ascertained. 

 I have repeatedly taken it in Herefordshire 

 when eager to net every blue, in the hope of 

 seciiring Acis, and have thus obtained a know- 

 ledge of its presence. In Ireland it is reported 

 by Mr. Birchall from the Murrough of Wick- 

 low, and from near Ross Trevor. My cor- 

 respondents resident in Ireland have not 



