116 Dr. Chapman on some neglected points 
allied in nature to the secretion by some of these miners, 
and especially Nepticula, of some poison that retards the 
autumnal decay of the leaf they inhabit. 
The imago is without maxillary palpi, but the pupa 
proves this to have been quite recently lost. When we 
examine the metathorax, the anterior section (scutum) 
has at first sight a Macro structure, that is, there are 
two well-developed lateral portions; but on close obser- 
. vation these are found to be continuous in a narrow but 
distinct chitinous ridge, such as does not occur in any of 
the Macro section of the Obtecte. 
Nepticula and Limacodes present us, indeed, with the 
Incomplete pupa in an extreme form; the empty pupa- 
skin has every segment and each appendage quite free 
from the others. The dorsal armature consists, in 
Cochliopods, of a number of rows of very fine spines, all 
belonging to one series. In the species of Nepticula I 
have examined there are no spines to the hind margin, 
but the anterior set is in some species a single row of 
largish spines, in others two rows and three rows; in 
the latter instances the spines are much smaller. There 
is therefore a variability in the armature that might 
easily extend to include the Cochliopod form. 
Nepticula, however, has one character that I have not 
met with elsewhere, viz., the antenne-cases on dehiscence 
divide into the cover of the first joint and that of the 
remainder, each separate from the head, yet still held 
together sufficiently to keep their places fairly. 
I have only had a portion of a pupa-case of Micropteryx 
(calthella), so do not like to insist further than I have 
already done on the association (from larval characters) 
of Zygena, Limacodes, and Micropteryx. 
In Sesia the larval prolegs, the strong development of 
the maxillary palpi, and the continuity in the imago of 
the anterior section of the metathorax across the middle 
line, appear to determine its place among the Tineoids 
in spite of some Tortricoid characters, such as the pos- 
terior dorsal rows of spines. 
Though I have, regarding this communication as 
largely preliminary, omitted detail wherever I could, 
as, for instance, I see I treat Alucita in four words, 
though this covers the rearing of a number from the 
egg and the examination of some dozens of pupe, I 
ought, perhaps, to note the ova of Zygena and Lima- 
