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SESIA APIFOEMIS. 
HORNET SPHINX. 
Plate YL Figure 9. 
This insect measures from one inch four lines to one 
inch seven lines, and even more. Male : front wings 
transparent, the upper edge broadly margined with dull 
yellowish brown; the outer edge dull yellowish brown. 
Hind wings also transparent, rather broadly edged with 
yellowish brown. The head is orange yellow ; the thorax 
brownish black, with a conspicuous spot of orange yellow 
on each side, with two others similarly behind them. 
The body is orange yellow; the first segment black ; the 
second black, orange yellow at the base ; the third black 
on its hinder part; the fourth dark brown ; the fifth 
and sixth dark brown on their hinder edge. 
Localities for this species are Exeter, Cambridge, 
Rawmarsh, Glasgow, and near Sheffield. 
The dates of the appearance of the perfect insect are 
from the end of May to July. 
The caterpillar is dull yellowish white, with a darker 
line along the back; the head blackish brown. 
The date of the appearance of the caterpillar is from 
October to April, when it changes to chrysalis. 
The caterpillar feeds on Lie wood of the poplar. 
