436 Mr. T. H. Briggs on 
each segment, the dorsal line becomes much narrower in 
the anterior segments. On each side of the dorsal line 
a row of large black spots, two on each segment, of 
which the anterior is the larger, with the inner posterior 
angle emarginate, and rounded on the side next the 
head ; the posterior spot is narrow, and curved on the 
inner margin. In the segments immediately following 
the head, the anterior margin is narrowly blackish, often 
only partially margined with black, with the dorsal spots 
confluent, the anterior being greatly reduced in size ; 
below which row of spots, a pale lateral line, with a 
bright yellow spot in the fold formed by the hind margin 
of each segment; below which line another row of black 
spots, two on each segment, of which the posterior spot 
on each segment is nearly spherical, and the anterior 
larger, and curved backwards, so as to terminate below 
the spherical spot, but sometimes uniting with it in the 
posterior segments ; it (the anterior spot) also bears the 
black spiracles ; the lower portion of this curved spot in 
which the spiracles are placed is often separated from 
the rest, as in Zygena, No. 1 (Trifolii) ; a minute black 
spot is often placed below the posterior of these two 
spots, but this minute spot is as often obsolete. Then 
follows another pale lateral line; and between this line 
and the feet is a curved blackish mark on each segment, 
bearmg a pale transverse lunule in its lower portion; a 
slight dusky line at the base of the feet; pro-legs and 
underside pale, with an interrupted dusky line (occasion- 
ally almost obsolete) down the middle of the belly. 
Feeds on Trefoil, &. Described June, 1866, from 
larvee taken at Folkestone. 
The larva has a great range of variation; its limit 
towards the confluence of the black spots is complete 
confluency ; the angles become developed, and assume 
the x-hke appearance of the early Vrifolii, but the 
ground-colour always more dusky, but the usual type is 
as described. 
The limit the other way towards the obliteration of the 
black spots is seldom beyond that in the above descrip- 
tion, the limit is attained before the range of variation 
of the marsh species begins. In some thousands, I have 
never seen one with the spots so small, and consequently 
the dorsal line so broad as in the late Zrifolii; and I 
have before remarked, that I have never seen the spots 
in the shape of those of Lonicere, as described. 
