Notes in 1887 upon lepidopterous larve, de. 528 
beginning of the stage varied greatly. The main tracheal 
trunk is quite visible through the whole of this stage, 
and the dorsal vessel still forms a very prominent dark- 
green median line. 
On September 20th, when the average length of the 
seventeen larve was 10.5 mm., they were all carefully 
compared together, with the following results :— 
Eleven of the larve without dark markings in Stage I.— 
Dark pigment (black in the extreme varieties, smoky in 
others) is now present in some of the larve, on the 
head, prothorax, thoracic legs, claspers, near the anus, 
and round the spiracles. 
The four lightest larve had the dark pigment only 
slightly developed on the claspers, thoracic legs, (in one 
of them the claspers were free from dark pigment, and 
the thoracic legs comparatively pale), round the spiracles, 
and along the lower edge of the furrow running below 
each lateral margin of the anal flap: from this furrow 
the dark colour tended to spread downwards. There 
was also a very slight dusky shade over the region of the 
ocelli in two of these larve. 
The remaining seven larve were much darker: in 
only one of them was the pigment on the head confined 
to the ocellar area. The darkening below the anal flap 
was strongly marked, and in a few of the darkest larvee 
it extended on to the flap itself, although chiefly 
developed upon the edges of the latter. The previously 
described dark marking on the dorsal surface of the 
prothorax was distinct in one of the darkest larve and 
just indicated in one or two others. One of these larve 
is represented in Plate XV., fies, Tie: S, 
Six of the larve, of which fe possessed the dark markings 
im Stage I.—These larvee were much lighter than those 
described above. Only one possessed the dark shade 
(and this not strongly marked) on the side of the head, 
other than on the ocellar area: only one (not the same 
larva) shewed some slight indications of the prothoracic 
darkness which was marked in five of these larve in the 
last stage. There was a slight cloud over the ocellar 
area of four larve. The lightest of all the seventeen 
larve was included in this division: in it the dark colour 
was absent from the region of the anus and the claspers, 
and was very slight on the thoracic legs and round the 
spiracles. All the larve except this, and one from the 
TRANS. ENT. SOC. LOND. 1888.—PaRY Iv. (pEc.) 2N 
