Notes in 1887 upon lepidopterous larve, ée. 585 
The caudal horn is still thorny and distinctly bifid, 
although not so deeply or widely notched as in the last 
stage. The notch was uniformly present in the larve. 
The appearance of the horn of the 8rd stage, as seen 
from the front, is shown in fig. 16, x 14°5. The horn 
figured was one in which the transparent zone was well- 
- marked; it is quite straight, and held at the angle 
shown in figs. 10—13. 
The results of this comparison of the darkness and 
the shades of ground colour in this stage may be 
expressed in the following tabular form. The intervals 
between the larve indicate breaks in the transitional 
series :— 
: Inter- 
Palest and bluest. | mediate.| Yellowest and darkest. 
ron ie Sueno oe aon 
The 10 pale larve { ) m 
of the last stage. ios rae i elena | aaa tira Tie 
The 7 dark larve of) | ~ 
the last stage. J Lentini Lael (ds cade sm] Sa Pe ED 
if i RE III. 
The larve with asterisks affixed were those represented 
in figs. 10,11, 12,18 (and 14). The divisions I., II., III. 
indicate the new arrangement, which was adopted on 
Oct. 2nd, after the comparison of colours. 
If the larve were arranged with reference to the shade 
of ground colour alone, the following series would be 
obtained (omitting the 9th in the division of 10 pale 
larvee) :-— 
‘ Yellowish 
Bluish green. Intermediate. green, 
1 5 
The 10 pale larve 3 — 4 — — (7 
Pp pales 6 (8 
10 
The 7 dark larve..... tah heauaes 4 ie} 7 
There are several points of extreme interest in this 8rd 
stage. The resemblances to Smerinthus larve are very 
marked, in the variability of the ground colour, in the 
variable development of red spots, and the relations of 
the latter to the borders of the stripes. The association 
