3i6 



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 unto (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 coloratmn, and 

 perhaps on grape also. 



Family PERICOPID^E (Per-i-cop'i-dae). 

 The Pericopids {Pe-ric' o-pids). 

 These beautiful insects occur within the limits of our 

 country only in the far West and in the Gulf States. They 



resemble the 

 "^™* Wood-nymph 

 , ni s 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 2 of 

 the hind wings, 

 which appears to 

 be a branch of 

 cubitus (Fig. 384). 

 Our most com- 

 mon species be- 

 long to the genus 

 Gnophcela (Gno- 



Fig. 384.— Wings of Gnophcela hopfferi. phae'la). These 



are black with conspicuous yellow spots. G. vermiculata 



