542 Notes in 1887 upon lepidopterous larve, é&c. 
Division I., and their appearance is represented in Plate 
XVL., fig. 4. One of these larve exhibited no trace of a 
bifid extremity to the horn, which was present in all the 
others of this division. Length of both larve 386 mm. 
(5). This larva was equally dark and with the longitu- 
dinal stripes less strongly pronounced. It would be 
classified with the darkest larva—(4)—of Division II., and 
may be represented by the figure of the latter larva (fig. 5). 
The yellow transparent zone on the horn was very distinct 
in this larva and (1), very slight in one of the last two 
larve, and absent from the rest. Length 30 mm. 
The comparison between figs. 1—5 (Plate XVI), 
shows the chief steps of the transition from the greenest 
to the darkest larve, but many intermediate steps are 
necessarily omitted. These are, however, indicated in 
the tabular form given below, which summarises the 
results of the comparison made above. The real break 
is between the three green larve and all the rest, and the 
differences between the former far outweigh those between 
the latter. Hence the following classification expresses 
the relation between the varieties :— 
Green oe 
i Garsnties, Dark varieties. 
Degrees of colour ....// 1] 2, 3 4) 4a) 4b] 4c 4d 4e 
Division I. of the last 
nine no opcud one 1!) Fy Siete al fetal ede (2)*| (3) | (4) | (5 6 
Division II. of the last ( ( ©) ©) 
aT) eke yc Sha) ef sati|ledoe ese 8 I 3 AA ee (4)* 
Division III. of the 
IES HRUENT So slot aallod lngcc [GAA » fib fata fess paeiate (2) | (3)* (4) | (5)' 
The asterisks indicate the larve which are figured on 
Plate XVI. It is very curious that each of the three 
divisions should have produced a single green variety. 
In this stage, for the first time, the shade of the larve 
followed, upon the whole, the arrangement of the last 
stage; although the parallelism was far from being 
complete, as we see in the appearance of a green variety 
in the darkest division (IlI.). The bright orange 
spiracles form a very prominent feature in this stage, 
together with the bright yellow longitudinal stripes in 
some of the dark varieties (see fig. 4). At the close of 
this stage, during the resting-period, the prothoracic 
