Notes in 1887 upon lepidopterous lavve, de. 6038 
shagreen dots are darker in colour upon the blacker parts of the 
larva. 
Fiag. 15, x 9. The head of the last larva, as seen from the 
front. The black bands have spread so as to cover by far the 
greater part of the surface, while the green ground colour, which 
is uncovered by them, is far darker than in the other larve. 
Fie. 16, x 14:5. The caudal horn of the 3rd stage, as seen 
from the front. The anterior side of the base is represented by the 
curved mark; below this mark a small part of the dorsal surface of 
the 8th abdominal segment is represented. The horn is still bifid, 
although the notch is not so marked as in the last stage (fig. 9). 
In other respects the structure is similar. The transparent zone, 
present in many larve of this stage, is represented in the figure. 
PuateE XVI. The ontogeny of SPHINX CONVOLVULI, 4th and 
5th stages :— 
Fries. 1, 2, 8, 4, and 5, all x 2. These five figures represent dif- 
ferent varieties of the larve at the end of the 4th stage; all seen 
from the right side. The larve represented are indicated in the 
paper. These also represent a transition from the green to the 
dark larve. 
The transition is, however, of greater extent than this series 
alone, for it is continuous through the darkest larva of the 
last stage (Plate XV., figs. 13 and 14), to the lightest Smerin- 
thine larva shown in Plate XV., fig. 10. The gradual disap- 
pearance of the green ground colour is very beautifully traced in 
this series of larve in the 3rd and 4th stages. Fig. 1 was the 
lightest of all the larve in the 4th stage; there was, however, a 
single larva intermediate between it and fig. 2. These three larvwe 
were the only green varieties which occurred in this stage. In 
fig. 3, the lightest of the dark larve is represented ; distinct traces 
of the green ground colour can still be seen. Tig. 4 is one of the 
dark varieties, with very prominent subdorsal and subspiracular 
lines. Fig. 5 is one of the darkest of the larve in this stage. 
The horn is now curved backwards, and appears to be smooth 
and shining, although it still retains small tubercles. The trans- 
parent zone is still present in many larve, and traces of the 
forked tip are very generally present. The larve were still 
distinctly shagreened, but this is not indicated in the figures. The 
distinct subdorsal and subspiracular are very conspicuous in many 
of the dark larve. The orange spiracles also form a very promi- 
nent feature. 
Fies. 6, 7, 8, 9, and 10, all natural size. These five figures 
represent the five chief varieties of the larvee when approaching 
maturity ; all seen from the right side. The differences are now 
TRANS. ENT. SOC. LOND. 1888.—paRT IV. (DEC.) 258 
