338 THE WHITE COFFEE-LEAF MINER. 
nellum and zancleellum. Cemiostoma coffeellum is the only spe- 
cies of the genus yet known outside of the limits of Europe. 
Our species may be known from the other species of the group 
by the following characters: C. zancleellum has not the first 
golden band on the costa; in C. susinellum this band extends 
across the wing, reaching the inner angle; in C. laburnellum, 
spartifoliellum and wailesellum, this band hardly reaches to more 
than half the distance from the costa to the black spot, and the 
second band is bordered on both edges by dark scales. Further, 
all the species of the group, except possibly O. zancleellum, have 
two or three fuscous streaks on the fringe, radiating from the 
black spot. I can discover no such streaks in this species. 
I do not find it recorded that any other species of the group, 
except C. laburnellum, breeds more than once in a year. Stainton 
says (Nat. Hist. Tin., i, 314) that C. laburnellum breeds twice. 
Seasons.—The larve are said to attack the new leaves in early 
- Spring, and to be found from that time forth. As the coffee-tree 
is evergreen, it seems likely that the period of hibernation is very 
short or none at all. Guérin says (Mém. etc., p. 16) 
insect occurs throughout the year in the Antilles, but is more oF 
less abundant according to the seasons. 
The eggs which I have mentioned were seen on the twenty-fifth 
of January. The planter who showed them to me said " 
seen the moths that day. I found the larvæ, pupæ, and imag? 
from the ninth of March until my observations ended om ” 
twenty-first of June. ; 
Periodicity. — Guérin says (Mém. etc., pp. 17, 43) that the egg 
hatch seven or eight days after being laid. The larvæ then live 
about fifteen or twenty days within the leaf, after which they pil 
their cocoons. The cocoon is spun within less than twenty" 
hours after the larva has left the mine. ‘The larva-skin i$ ee 
off within twenty-four hours after the cocoon is completed. ern 
not observe how long the pupa-state continues. AC pent 
Guérin (Mém. etc., p. 13, 17), the imago comes out of mi I 
at the end of six days. It is not known how long diet 
should judge that it lived less than two weeks, as that ci 
noticed to be the probable limit of life in C. scitellum ( 
Monthl. Mag., iv (1867), p. 162). eh f eggs È 
The history of reproduction, and of the deposition © ity 
not known. It must have an important effect upon the long?" 
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