£22, ACIDALIA STRIGILATA. 
and spiracular lines are very inconspicuous, and seem 
to be composed of confused, waved, faint brown lines ; 
spiracles very small, brown. On the centre of the 
back, and on the extreme anterior edge of the sixth, 
seventh, eighth, and ninth segments, is an intensely 
black square mark, divided into two distinct spots by the 
medio-dorsal line passing through the centre; shghtly 
in front of each of these marks are two other equally 
black but smaller dots, one being a little to the right, 
the other to the left, and placed at the posterior edge 
of the segments. The belly is pale greenish-grey, with 
a still paler central stripe, and on each side of this 
stripe are one or two very faint, pale brown, zigzag, 
longitudinal lines. 
In the middle of June it spun its cocoon (which was 
more firmly constructed than those of other species of 
the genus I have had) at the foot of the knotgrass on 
which it had been feeding. (George T’. Porritt, July. 
13th, 1871; H.M.M., September, 1871, VIII, 91.) 
ACIDALIA IMITARIA. 
Plate CXIX, fig. 5. 
The ege of A. wmitaria is somewhat pear-shaped, 
but flattened at the smaller end; strongly ribbed, and 
irregularly reticulated between; colour glistening 
white, with small blotches of delicate pink. (J. Hellins, 
July, 1868; H.M.M., September, 1868, V, 97.) 
One beaten from clematis by Mr. Jeffrey, of Saffron 
Walden, May 17th, 1871. 
This larva is very remarkably slender and snake- 
like, in length an inch and a sixteenth, the thoracic and 
the posterior segments short and the rest very long, 
each of these being subdivided into about twenty-seven 
rings by deep and close wrinkles. 
The colour is a very pale, rather greyish-buff tint. 
The dorsal line begins on the second thoracic segment 
