444 BRITISH BUTTERFLIES. 



and in the intensity and amount of markings ; the adult larva, 

 however, is usually dark green, with some whitish markings on the 

 outer edges of the dorsal ridges, edged inferiorly with reddish, and 

 with a broad dorsal band of red-brown occupying the raised area 

 between the dorsal ridges, the band being more or less disturbed by a 

 central green patch in the forward portion, and by intersegmental 

 green lines on the hinder part ; the red-brown colour affects the hair- 

 bases and hairs as well as the skin ; the oblique lateral lines, or shades, 

 are usually pale green. Chapman observes that, in July, 1903, larvae 

 were abundant at Moncayo, on heath, apparently Erica arborea, but 

 these larvae were dove-coloured, with brown markings, and no trace of 

 green. Schneider says that, in Upper Lusatia, the larvae found on 

 Genista tinctoria are yellow, those on Ehamnus franyula green. Adkin 

 notes that, at Eastbourne, in September, 1896, on ivy, there were two 

 distinct colour-forms, one purplish the other green. Buckler describes 

 five forms [Larvae Brit. Butts., i., pp. 97-99) : — 



1. Bright yellowish-green, with a pale streak on dorsal ridges; thin, double, 

 slanting lines on sides, a margin of yellowish-white along subspiracular region. 

 The head purplish-brown, an ocbreous streak above mouth and at base of papillae ; 

 the spiracles round and flesh-coloured ; skin velvety, with its surface thickly 

 covered with yellowish, warty granules, each having a minute, bristly hair. 



2. Of the same yellowish-green ground colour ; dashes of deep rose-pink on 

 each humped ridge of the back, and in the dorsal channel continued to the anal 

 end, and an additional dash on each side of the 1st abdominal ; along the sides, 

 fine, double lines of pale greenish-yellow, edged with darker, slanting backwards; 

 the subspiracular ridge itself of a whitish flesh-colour, deepening above and 

 below with a narrow border of full rose-pink, which again melts into the green 

 ground colour. 



3. Shows a very pretty mixture of green and black ; the ground colour green as 

 before, a transverse bar of black across the middle of the prothorax and beginning 

 of mesothorax ; a dorsal series of thick dashes from the mesothorax to the 6th 

 abdominal ; the 7th with a dash on either side enclosing the green ground colour 

 as an interruption, with the dorsal marking again occurring on the 8th and 9th 

 abdominals; on each ridge of the back is 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 1st 

 abdominal the upper markings are thicker and run together. 



4. Olive-green, strongly marked with crimson on the dorsal region and along 

 the sides, and deeply suffused with this colour on the thoracic segments; in the 

 midst of this suffusion a pale yellowish-olive semilunar patch, situated transversely 

 on the back at the hinder part of prothorax. 



5. With deep rose-pink on the three thoracic and last three abdominal 

 segments ; the other segments of the body light green. 



It should be noted that about four or five days before pupation 

 the larvae sometimes become of a dingy olivaceous-pink, or mouse- 

 coloured. 



The eversible and honey glands of Celastrina argiolus. — 

 Guenee described, September 25th, 1867, some interesting structures 

 observed by himin the larva of Lampides boeticus (see aiitea, pp. 348-350). 

 In July, 1869, Goossens observed similar structures in the larva of 

 C. arf/iolus. This observer notes (Bull. Soc. Ent. Er., 4th ser., x., 

 pp. 77-78) that he found five larvae on "vigne vierge," in which he 

 noticed the organs described by Guenee : (1) A sort of cushion on the 

 10th (7th abdominal) segment, whence a transparent hemispherical 

 vesicle was extruded, which secreted freely a large drop of fluid that 

 was renewed as soon as the former one was absorbed. (2) On the 

 11th (8th abdominal) segment, two openings (one on either side), from 

 which a disturbed larva extruded a pyriform organ, the end of which 



