119 
HOWARD’S WHITE BUTTERFLY. 
Pontia Metra. 
PLATE VIII. Fig. 2. 
Stephen's Ulus. Haust. i. 19. 
The wings of this insect expand from 20 to 25 
lines. The colour is entirely yellowish-white, the 
base of the wings blackish, and the tip of the ante- 
rior pair, which is more acute than in the allied spe- 
cies, slightly suffused with light brown : in the male 
there is a single dusky spot, and in the female two, 
which, however, are always veiy obsolete, and some- 
times, as in the variety figured, entirely wanting. The 
hinder wings are wholly white, with the usual dusky 
spot anteriorly. The tip of the upper wings is yel- 
low beneath, and two faint spots are observable on 
the disk ; the hinder wings beneath rather bright 
yellow, especially on the anterior edge at the base, 
and sprinkled with black points. The fringe of the 
wings is nearly pure white. 
Occurs early in April, and there appears to be a 
second brood in June. It has been noticed chiefly 
in the south of England, but is probably to be found 
