NOTES ON THR UPE-HISTORY OF 0iE\O\YPMPHA CORINNA. 95 



is flat. Under a hand lens they appear pearly white, flecked with pale 

 red, or flesh colour. Heisifht, -8 mm. ; diameter at equator, about ^ 

 up from base, -7 mm.; at the top, between -4 mm. and -5 mm. The flat- 

 tened top has a slight pimple at centre. About 28 rather weak longi- 

 tudinal ribs run up the sides ; these turn over the edge, but fade on 

 the top, which is covered by a faintly marked hexagonal cell network. 

 The longitudinal ribs also fade out IdoIow the equator, the base being 

 covered, like the top, with a cell network. Faint traces of cross rib- 

 bing between the longitudinal ribs are also present. 



Jja^wa.^ First instar (June 15th). — Body slug-shaped, tapering 

 towards head and anus ; colour, a delicate pale green, with a duller 

 tendency on dorsal area, and clearer pellucid-looking medio- and sub- 

 dorsal stripes ; beneath these are two narrow, faint, whitish lateral 

 stripes, and a broad and much stronger white spiracular band. Head 

 black, with a very rough surface ; a few scattered hairs are present ; 

 these are short, but very stout and tapering to a point. Body : the pro- 

 thorax is constricted, giving the larva the appearance of having a 

 neck. The segments are poorly marked, but the subsegmental divi- 

 sions are clear ; as a result, it is very difficult to discern exactly where 

 the segmental incisions occur. Anal plate prolonged into two back- 

 ward jutting processes, each of which bears a longish hair. With this 

 exception the body-hairs are very short and stout, of glandular form, and 

 so transparent that they are difficult to see. There appear to be seven 

 subdivisions to the abdominal segments and five to the meso- and meta- 

 thorax. The 2nd subsegment of the abdominal segments is equal to any 

 two of the others, and the 3rd is also rather larger than the remaining 

 subdivisions, while the division between the 2nd and 3rd is so weak 

 that the two are liable to be mistaken for a single large subdivision. 

 Tubercles i and ii on abdominal segments are set trapezoidally, but on 

 the meso- and metathorax they are, I think, in transverse line, but, owing 

 to the transparency of the sets, it is extremely difficult to locate the tuber- 

 cles at all. Final instar. — My attention was so much occupied during 

 June and July that I had no opportunity of further examination until 

 July 27th, when I found that the two surviving larvfe of five had 

 spun up, and one had already pupated. The other is now about 1 1 mm. to 

 12-5 mm. long, slug-shaped and tapering, especially towards anus. Colour 

 bright green, especially vivid on dorsal area, shading ofl' to a duller 

 and paler hue on ventral area. The dark, clear mediodorsal line is 

 narrowly bordered by pale yellowish-green. There is also a narrow, 

 yellowish subdorsal and a broad yellow lateral (spiracular) stripe. 

 The head is of the usual rounded and thick or deep-looking Satyrid pattern, 

 with a very rough and granular-looking surface ; colour green, with 

 numerous very short, pointed, bristle-like hairs scattered on its surface. 

 The body has a coat of spicules, and also bears very short, pointed 

 secondary hairs, with raised bases. The secondary hairs and spicules form 

 two perfectly distinct characters, the spicules being very fine and forming 

 a complete coat, while the secondary hairs are sparse and scattered, 

 and very much larger, although still very short. The scutellum on the 

 prothorax is very much roughened by the large size and greatly raised 

 bases of the secondary hairs that occur on it. These coats of hairs 

 and spicules give the larva a very rough and shagreened appearance. 

 The anus is forked, ending in two short, pointed processes. Spiracles 

 oval, with brown slightly raised, chitinous rims ; those on the pro- 



