414 Dr. T. A. Chapman's Contribution to 



like those in some Lasiocamps or say, more vulgarly, like 

 a cowcatcher. As they get older (Aug. 24th), a few develop 

 dorsal and lateral yellow^ flange lines (as in Coridon, etc.). 



The armature of hairs, etc., in the 2nd instar is shown in 

 PI. XCI, fig. 28. 



On Aug. 27th several are in 3rd instar, and these vary 

 much in colouring, or rather perhaps in marking ; some have 

 paler, hardly yellow, dorsal and lateral flange lines; most 

 have some indication of a darker, greyish longitudinal band 

 along the middle of the slope — one or two have this very 

 marked; the hair bases are black, and a good many hairs 

 are black, so as to be quite obvious. 



On Sept. 9th they seem now to be full-grown or nearly 

 so in 3rd instar, and some have ceased feeding. 



They are 4-5 to 5*8 mm. long, green, with a paler hardly 

 yellow lateral flange line, a darker medio-dorsal line, and a 

 similar darker (dark apple almost olive green) line half-way 

 up the slope ; on each segment this has above and below it 

 a paler line or streak, the three together just visibly obhque 

 (downwards or backwards) when closely observed. There 

 is a rather darker shade just above the lateral Une. Seen 

 laterally the dorsal humps on each segment are marked ; on 

 each are several, 3 or 4, long dark hairs (about 0'3 to 0*5 

 mm. long). The lateral hairs are pale brown. 



In one larva the lateral line and one down each dorsal 

 flange may be called yellow, and the darker shades can only 

 be recognised as having a slightly different tone from the 

 ground-colour. Another larva is rather darker, so that 

 the lower portion of the slope is dark. Most show a dark 

 mark near the spiracle. 



Sept. 16th. — All seem to have laid up for the winter, most 

 on the leaflets of the food-plant, much as they do when at 

 rest, but still feeding; others on the bottom of the box. 

 Their colours vary from a nearly uniform green, with just 

 a suspicion of paler (yellowish) dorsal and lateral flange 

 lines, and still fainter oblique lines; others are very dark 

 with dark shading over large areas. The drawings by Mr. 

 Knight are excellent; they perhaps hardly show the oblique 

 lines to be quite as oblique as they are. Really the obliquity 

 is very faint, and only shows at each end of the paler shades 

 above and below the dark line, which is nearly straight. 



Several varieties of the larva in 3rd instar are shown in 

 Mr. Knight's drawings, PI. LXXXIII, figs. ], 2, 3 and 4. 



The larvae were placed in a refrigerator during the winter • 



