340 THE WHITE COFFEE—-LEAF MINER. 
who pointed out to me these interesting details. The skin is then 
thrown off and pushed out through the posterior end of the 
cocoon. ; 
Habits of the Imago.— The pupa-skin is split transversely across 
the back of the head (vertex) then longitudinally along the sides 
of the thorax as far as the metathorax. When the imago emerges, 
the pupa-skin is left inside of the cocoon, generally I think, but 
in some cases I have found it protruding from the anterior end of 
the cocoon, through which the imago escapes by pushing aside the 
threads. It rests on or under the leaves or branches, but is easily 
disturbed. ‘It is very lively and very agile,” as Guérin says 
(Mém. ete. p. 16) “and flies in all directions seeking to copulate, 
It is seen to execute rdpid bounds, and its jerking flight makes it 
known even at a distance.” It flies in the day-time, perhaps also 
in the night-time. 
I judge from the appearance of the scars in the epidermis, al- 
ready described, that the eggs are laid unconcealed on the upper 
surface of the leaf; singly, or in sets of two, three or more, but 
not in immediate proximity, and that sometimes two or more sets 
are placed on the same leaf. It is not known how many eggs 4% 
laid by one female. — To be continued. 
EXPLANATION OF PLATE 5. 
Fic. 1. Imago of Cemiostoma coffeellum, magnified 15 diameters. < 
Fic.2. Empty pupa-skin of the same, seen from beneath, magnified about Aue 
ters. (The projections near the head are the broken sides of the thorax.) 
Fic.3. Larva of the same from above; the head retracted, magn- 15 diameters. i 
Fic.4. Head of the larva from below, showing some of the mouth-parts, magnified 
Fic. 5. Cocoon of the same, natural size; 5a, the same magnified 3 aa on 
Fig. 6. Leaf of coffee tree natural size, containing five mines made by ten gem 
of the larvæ belonging in the four mines wholly figured ; 6 at the 
magnified 10 diameters to show the scar made by the larva ie gy Pee 
leaf; 6b, part of a mine magnified 5 diameters to show the slit made 
larva in leaving the mine. 
