3i 6 
THE STUDY OF INSECTS. 
resemblance to that of Alypia , but may be distinguished by 
having only six transverse black lines on each segment. It 
has the same food-plants as the species described above. It 
transforms in a cell in the ground or in soft wood. 
The Pearl Wood-nymph, Euthisanotia unio (E. u'ni-o).— 
This moth closely resembles the species just described, but 
is smaller, expanding a little less than one and one half 
inches. The outer border of the front wings is paler and 
mottled ; and the band on the hind wings extends from the 
inner angle to the apex. The larva resembles that of E. 
grata ; it feeds upon the leaves of Euphorbia coloratum , and 
perhaps on grape also. 
Family PERICOPID^E (Per-i-cop'i-dre). 
The Pericopids {Pe-ridb-pids). 
These beautiful insects occur within the limits of our 
country only in the far West and in the Gulf States. They 
__ resemble the 
***• Woo d-n ymph 
Moths in their 
strongly contrast¬ 
ing colors; but 
can be distin¬ 
guished from 
them by the po¬ 
sition of the ori¬ 
gin of vein V, of 
the hind wings, 
which appears to 
be a branch of 
cubitus (Fig. 384). 
Our most com¬ 
mon species be¬ 
long to the genus 
G nop ha la (Gno- 
Fig. 384.—Wings of Gnopheela hopffen. pllSe^la). These 
are black with conspicuous yellow spots. G . vermiculata 
