Ee. CET Ss): 
FURTHER NOTES ON 
BY VACTOR TOUSEY CHAMBERS, 
SOME TINEID LARVAE. 
COVINGTON, KY. 
(Continued from page 137.) 
The regular ratio of growth between 
the different stages of these minims would 
scarcely be believed by one unfamiliar 
with such facts; thus the lengths of this 
species (NV. pieliaeella) at its several 
molts are, as above stated, 0.8, 1.6, and 
5.2 mm., and to adopt the language of the 
anthropologists, its ‘‘ cranial capacity,” 
as indicated by the width of the head at 
the widest point, is in the different casts 
of the same larva, 0.0825, 0.165, and 0.33 
mm. 
The mine is a very pretty one ; and sev- 
eral of them together give to a leaf a very 
singular appearance. The mines fre- 
quently cross themselves and each other, 
and sometimes almost the entire contents 
of a leaf are eaten out. 
mine in oak (Quercus) and another in 
hickory (Carya). In these however there 
is no little blotch at the beginning, the 
frass is deposited in a central line in the 
first part (corresponding to the first stage 
of larval life’), as it also is in the last 12 
mm. of the mine, as in this species. This 
last character is preparatory to leaving 
the mine to pupate, and does not indicate 
a molt accomplished, as the other changes 
in the character of the mine do; but it 
There is a similar 
is probable that every change in the mode 
of feeding, and if the character of the 
mine, and every decided break in the 
continuity of the frass made by a larva 
in early life, indicates that it has just 
compieted a molt. Yet there are many 
Nepticula mines in which I have not 
only failed to find any molt, but also 
have failed to find any indication of one. 
Perhaps the enlargement of the mine of 
N. fuscotibiaeella two days before it 
ceases to feed may indicate that a molt 
then takes place, but I have not found 
that its does. 
The only cocoons that I have seen 
were yellowish green and about 2 mm. 
long; they were between the side of 
the glass breeding jar and the earth in 
the bottom of it. Does it pupate under 
ground ? 
Aspidisca saliciella Cham. The egg 
is deposited usually at the side of the 
midrib in willow leaves [Salix]; .the 
larva makes a mine just wide enough to 
hold it, along the midrib, and 2.12 mm. 
long ;. here it undergoes its first molt, 
being at the time 1.06 mm. long. It then 
leaves the midrib and makes a clavate 
mine 3.356 mm. long, when it undergoes 
