ACIDALIA TRIGEMINARIA. 
TREBLE BROWN SPOT. 
Plate XXIII. Figure 11. 
This insect measures a little over three quarters of an 
inch in expanse. 
Male : fore wings dull whitish-yellow, dark grey at the 
inner corner. The second line is dark grey and waved, 
followed by a dark band of grey interrupted above the 
middle; central line indistinct, central spot black. Hind 
wings sometimes plain, but sometimes with a dusky 
streak within the margin. 
Localities for this species are Bristol, Tenterden, Exeter, 
Darenth Wood, Lyndhurst, Pembury, Ipswich, Renfrew. 
The perfect insect appears in July. 
ACID ALIA CONTIGUARIA. 
Plate XXIII. Figure 12. 
This insect measures a little over three quarters of 
an inch across. 
Male : fore wings pale greyish. The first line is dark 
brown ; second line dark brown and waved ; central line 
brown ; central spot black. 
Localities for this species are near Conway, North 
Wales. 
The perfect insect appears in July. 
