'EPHROSIA EXTERSARIA. Al 
chocolate-brown at each side, but paler purplish-brown 
in the middle, which gives the appearance of there 
being two small dark humps; the smaller ridge on the 
sixth segment dark chocolate-brown; spiracles distinct, 
each being placed on a round lunule of a paler shade 
of the ground-colour; they are pink, encircled with a 
clear black ring. 
Ventral area dingy oreen, In Some specimens with a 
central longitudinal row of white spots ; in others these 
spots are absent; the seomental divisions, and the out- 
side of the front pair of posterior legs purphish-brown ; 
anterior legs also reticulated with purplish-brown. 
In Var. 2 the ground colour is purplish-brown, 
except the head and second segment, which still partly 
retain the green character of the more numerous 
form; head tinged with brown, and the black spots at 
the base of the sides of each lobe distinct ; in some 
specimens two interrupted yellowish lines extend 
through the dorsal area; in other specimens these 
lines are almost obliterated ; the purplish-brown marks 
of Var. | are in this form replaced by dark chocolate- 
brown, but the two white, nearly triangular spots on 
the posterior edges of the segments (in some speci- 
mens from the second to the eleventh) show out 
distinctly ; both the lateral ridges are dark chocolate- 
brown ; each spiracle is placed in a pale lunular patch, 
pinkish, ringed with intense glossy black. 
Ventral surface dull purplish or chocolate-brown (in 
some specimens tinged with dingy green), except on 
the frontal segments, where it is green, and an inter- 
rupted stripe of clear white spots extends through its 
centre; segmental divisions purple; outer part of the 
front pair ol posterior legs purplish-brown, the hind 
pair green; anterior legs reticulated with “purplish- 
brown. 
My larve fed on birch, oak, sallow, and osier, 
but seemed to prefer sallow and osier. ‘The last speci- 
men went down on September 4th, and on the 19th I 
described one of the pupee as follows : 
