338 Transactions. 
The head-capsule and its setae are shown in the figure; arrangement of E 
eyes, antenna, labrum, and mandible are reproduced in Plate 31, figs. 4-6, E 
and need no further comment. E 
ha is a small seta present on all segments except 9; beta is larger 
and placed caudad to and below alpha except on the prothorax where 
it is nearest the meson, and on the mesothorax and metathorax it is 
included in the same tubercular area as alpha but situated almost 
are above and somewhat in front of spiracle excepting in 8 where they 
are entirely in front ; on 9 epsilon again rises above rho. The kappa group 
contains eta and kappa both in the common tubercular area situated 
leg on thoracic segments, two minute setae on segments 1, 2, 7, and 8, 
three on segments 3-6, and is absent on 9. Sigma is present on 
segments. The chaetotaxy of segment 10 has not been attempted, but 
the map of the setae is given in Plate 31, fig. 7. 
Habits of Larva. 
„The nomadic existence of the larva has already been noted. The 
exit from e may be either through upper or lower cuticle—there 
not known. When disturbed the larva exudes a black fluid from the — 
mouth, and if shaken from a leaf while outside the mine will utilize à 
fine silken thread by means of which it may find its way back. 
The Cocoon. (Plate 27, fig. 1.) à 
. This is a cylindrical structure of thin white silk constructed within 
the final blotch-mine. Usually in central portion of mine, and from its 
anterior end to outer margin of leaf there extends a slightly-curved silken - 
