125 
TERIAS MEXICANA. 
PLATE VIII. Fig. 4. 
Boisd. Spec. geu. p. 655. PL iii. C, fig. 1. 
This insect was discovered not long since in Mexico, 
and is considered rare. The colour of the surface 
is very bright citron-yellow, the upper wings with a 
broad black border externally, which ends in a 
quadrangular expansion a little before the middle of 
the internal margin. The under wings have the 
outer border prolonged into an acute angle, forming 
a kind of rudimentary tail, and the anterior half is 
widely bordered with black. The primary wings 
are pale citron-yellow on the under side, with a 
central black point, and have the outer border near 
the fringe tinged -with red ; the secondary pair 
yellow, speckled with ferruginous particles, and 
having a black point in the centre, the extreme 
angle marked with a ferruginous spot, and the pos- 
terior half with four or five other spots of the same 
colour, having sometimes a tendency to form an irre- 
gular transverse band. The above description applies 
to the male ; the female has the surface of the wings 
whitish-yellow, with the black border broader, and 
the anterior margin of the secondary wings widely 
orange yellow. The expansion varies from twenty 
to twenty three lines. 
