Life History of Hesperia sidae, Esp. 567 
Length: 35 mm. Head, heart-shaped, rather flat in front, shiny 
black. Plate on prothorax rather long and narrow, dark brown. 
Colour of body, dull yellowish brown. The dorsum is much 
wrinkled by subsegmentation. It has a faint stripe down the 
centre, darker than the ground colour, and with a more shiny 
surface than the rest of the body. There are no other lines or 
markings visible to the naked eye, but the microscope shows a good 
deal of mottling arranged roughly in lines, and somewhat similar, 
though weaker, to that seen in some Noctuid larvae (Catocalids, for 
instance). The skin is shiny. It is rather thickly covered with 
small, dirty whitish blotches, too numerous to be all primary 
tubercles, though these are similar in appearance. The hairs (rather 
long, whitish to the naked eye, colourless under microscope) grow 
from the primary tubercles. They are curved forward on head and 
on the prothorax, and are plain. On the abdominal segments they 
are bifid, forming a Y. One hair only, to each tubercle. 
Second Stage-—The same larva was resting for the second moult 
on June 7th, and I then made the following notes :—Length : 
55 mm. Head entirely black. It is still heart-shaped, particularly 
with regard to the upper part, the lobes being well divided at the 
top of the head. It is pitted, and at the same time covered with 
shallow, irregular, wrinkled cells. It bears numerous short, whitish- 
brown hairs, and a few longer ones above the mouth parts and 
around the ocelli. The head is rather small in proportion to the 
body, which is plump and has much the shape of that of the larva 
of Carcharodus alceae, tapering rather abruptly towards the anal 
extremity. Prothoracic plate, black, resembling two short strips of 
black court plaster, one strip on each side of the dorsal centre, with 
small suffused break between. Theneckisslender. Colour of body 
pale brownish. There is a distinct dorsal line of a darker brown 
colour, and outside that a considerable amount of brownish mottling, 
darker than the ground colour, and arranged in irregular longitudinal 
lines. The tubercles are small, dull white pimples, most of them 
bearing a single, rather short hair very slightly tinted brown. The 
hairs are more numerous, but proportionately shorter than in the 
first stage, and are no longer forked but spatulate, gradually in- 
creasing in width from the base upwards, the increase being more 
rapid towards the free extremity, which is cut off level or sometimes 
slightly split down the centre. The long hairs on the head are 
tapering, not spatulate. Those on the sides of the body are less 
frequently spatulate, particularly the longer hairs, which are curved 
backwards. The lateral area has also considerable brownish 
mottling. 
The true legs are black. By transparence they are greyish black. 
PPr2 
