THE WHITE COFFEE-LEAF MINER. 337 
When the larva escapes, it cuts an angular or rounded slit in 
the epidermis near an edge of the mine. This slit is slightly more 
than one millimeter across, about one and five-tenths millimeters 
ong. 
The eggs.— Before I had seen any of the insects, I was shown 
some eggs on a coffee-leaf, which were said to be the eggs of this 
moth. I was not able to describe them at the time, but I think 
they could not have belonged to this moth, because they seemed 
too large. Stainton says, however (Nat. Hist. Tin., i, 324), that 
the eggs of C. scitellum, which is in its habits one of the nearest 
allies of this species, are disproportionately large for the size of 
the insect. Guérin does not describe the eggs in his memoir. 
_ Classification. —It belongs to the suborder of scaly-winged 
Insects (Lepidoptera), which may be known from other winged 
‘sects because their wings are more or less covered with scales, 
which lap over each other like tiles on the roof of a house, and 
further they (in the imago state) have no visible jaws, but either 
have a tubular tongue formed of two similar pieces which can be 
rolled up like a watch-spring, or have no means of taking food. 
It belongs to the tribe of cloth-worm moths (Tineina), which 
ate all of small size, and may be known from the other Lepido- 
ptera because their wings, which are elongated, are not split, but 
ate fringed with long hairs. 
According to Zeller (Linn. Entom., iii (1848), p. 250), the 
only Tineina whose larvee make mines in leaves, and whose ima- 
` 808 have the head covered with entirely smooth scales, and have 
the lower joints of the antennz widened into an eye-cap, are in- 
cluded in the genera Cemiostoma and Phyllocnistis. These genera 
with others, were considered by Stainton (I know not in what 
Work) to form the family of Lyonetia moths (Lyonetide). The 
genus Cemiostoma, to which our insect belongs, is distinguished 
the genus Phyllocnistis by the absence of tongue-shields 
(Palpi) (1. c., p. 250), and by the middle area (cell) of the fore 
™ngs not being closed (l. c., p. 265). 
= genus Cemiostoma was divided by Stainton (Nat. Hist. 
i » 1, 288) into two groups, one of which has the anterior 
ngs of the perfect insect white, while the other has these wings 
‘Sigil The former of these groups, to which our species 
i n contains six species, as far as known at present. These 
` Susinellum, spartifoliellum, wailesellum, coffeellum, labur- 
AMER. NATURALIST, VOL. VI. 22 
