APPENDIX. 473 



entirely without markings, but, as in the larvae of Amorpha populi, the 

 markings are formed during the first stage, and are distinctly visible 

 before the first moult. The long caudal horn is of a red colour. 

 The first moult takes place in two or three days. Second instar : The 

 length is now lcm. ; the seven beautiful oblique white stripes and the 

 fine white subdorsal line are more strongly pronounced, the latter 

 becoming broader in front ; they differ from those of A. populi in 

 having the oblique stripes united in the dorsal line. The second 

 moult occurs after another three days. Third instar: There is no 

 important change, only the fine subdorsal line becomes somewhat 

 fainter. The third moult takes place four days later. Fourth instar : 

 The oblique stripes remain as before, but their upper portions now 

 stand on a somewhat darker green ground colour, whilst the 

 subdorsal line vanishes, leaving distinct traces only on the three or 

 four front segments. The fourth moult follows after a period ot seven 

 days. Fifth instar: Scarcely any difference in marking occurs, 

 only small differences in coloration become perceptible on the head 

 and horn, these changing to bluish. Specimens occur, although but 

 rarely, which show, in this last stage, red spots in the vicinity of the 

 oblique stripes, just in the same manner as with larvae of A. populi, in 

 which species, however, they occur more commonly. I only once found 

 an adult larva of S. ocellata possessing reddish-brown spots above and 

 below the oblique stripes, exactly as in one of the specimens figured 

 by Rosel ( Insecten-Belustigungen, suppl. pi. xxxviii., fig. 40) 

 (Weismann, Studies in the Theory of Descent, transl., pp. 240-241). 



Amorpha populi, Linne (Vol. hi., p. 460). 



[Page 469. J Amorpha populi ab. sub/lava, Gillmer, " Illus. Zeits. fur Eat.," 

 v "-j P- 375) fig s - I_2 (1902). — Die gauze Oberseite bedeckt ein gleichfarbiges Thongelb 

 (von der lichten Faroe einer frisch gebrochenen Ofenkachel) ohne alle Zeichnung nur 

 der Basalfleck der Hinterfliigel ist schwach rostfarben und in seiner sonst ublichen 

 Ausdehnung etwas beschrankt. Die Rippen zeigen eine ganz gleichfarbige 

 Beschuppung, ein Mittelfleck ist nicht sichtbar und eine helle Teilung der 

 Flugelspitze nicht vorhanden. Die Saumlinie der Fliigel tritt mit einem etwas 

 defer braunlichgelben Tone hervor. Die Unterseite aller Fliigel ist gelbgrau, 

 ohne alle Zeichnung ; die Rippen heben sich mit gauz schwach braunlichem 

 Tone daraus ab. Fuhler gelblichweiss. Thorax gelbgrau. Hinterleib hell 

 braunlichgelb, mit helleren Ringteilungen. Das Stuck gehort der zweiten 

 Generation an und schliipfte in Schlesien. Es ist durch Fig. I dargestellt 

 (Gillmer). 



This aberration, described above as having " the upper 

 side unicolorous clay-yellow without markings, only the basal 

 patch of the hindwings pale rust-red and somewhat more 

 restricted than usual, the nervures concolorous, the central spot 

 obsolete, the light apical line absent, the marginal line somewhat 

 deeper-tinted, brownish," is evidently an extreme yellowish form of 

 our ab. pallida, which is described (anted, iii., p. 469) as " whitish- 

 grey, often with a faint yellowish tinge, usually with ill-defined 

 markings." This was given as a group name to include all those 

 pale (whitish-grey and yellowish-grey) examples with no markings 

 or ill-defined ones. The trernulae of Borkhausen is the extreme 

 development in one direction (whitish-grey with no markings), subfiava 

 the extreme in the opposite direction (unicolorous clay-yellow almost 

 without markings) whilst Glaser's trernulae (Ofrerhess. Gesell. Nat., iii., 

 P« 53)> which is described as smaller and lighter than A. populi, 



