ANTHROCERA TRIFOLII SUBSP. PALUSTRIS. 501 



quite transparent. [Eggs received from Messrs. Baeot and Clarke, on 

 July 17th, 1897, described the same day under a two-thirds lens.] 



Larva. — Briggs describes (Trans. Ent. Soc. Loncl., 1871, p. 437) 

 the full-fed larva of this species, as having the " body with short 

 white hairs scattered over it, with very few black hairs mixed with 

 the white on the back. The head and true legs are black ; the trans- 

 verse upper lip and membrane at base of antennae, white ; the ground 

 colour pale yellowish, arranged in five lines, one dorsal, and two 

 lateral on each side. The dorsal line is broad, yellower in the fold 

 that is formed by the hind margin of each segment. On each side of 

 the dorsal line there is a row of black spots, two on each segment, of 

 which the anterior spot is the larger, somewhat semicircular with the 

 flat side turned towards the anus, the posterior spot is narrow, curved 

 on the anterior margin, approaching in shape to a lunule. On the 

 prothorax the dorsal spots are confluent, the anterior being greatly 

 reduced in size ; the anterior margin of this segment, also, is partially 

 margined with blackish, leaving the middle portion of the yellowish 

 ground colour. Below the dorsal spots there is a broad pale yellowish 

 line, with a yellow spot on the fold, formed by the hind margin of 

 each segment, but this spot is not very conspicuous. Below this line, 

 again, is another row of black spots on each side, two on each seg- 

 ment, of which the anterior is larger and curved backwards, and 

 bears the black spiracles, but very often the lower portion of the 

 spiracle-bearing spot is separated from the rest, and sometimes 

 dwindles down to a mere dot. (There is no minute black spot below the 

 smaller of the two lateral spots, as is often the case in the larva of A. 

 filipendulae.) Below this spiracular row of spots is the lower lateral line, 

 and between this line and the feet is a row of dusky spots bearing a pale, 

 transverse lunule in the lower portion of each ; this lunule is some- 

 times absent, or nearly so. A dusky, very narrow, streak extends along 

 the base of the prolegs, the latter and ventral area yellowish, with a 

 dusky interrupted line down the middle of the venter." On July 16th, 

 1897, we described & full-fed (dead) larva found in a cocoon (from the 

 Norfolk coast) as follows : The head shining black, cleft at apex, several 

 cream-coloured marks at the base of cleft, surface sprinkled with 

 hairs. Body pale yellowish, with two longitudinal rows of black 

 spots running down either side of the mediodorsal line, another on 

 either side of, but separated from, these dorsal rows, by a longitudinal 

 line of the yellow ground-colour. The small, indistinct, black spiracles 

 are placed each in one of the black patches forming this row. There 

 is another longitudinal subspiracular row of black spots on either side, 

 and separated also from the spiracular row by a longitudinal band of 

 the ground colour. Each of these rows of black spots is very similar ; 

 on each segment there is a large anterior, separated from a rather 

 smaller posterior, black spot. The dorsal rows of black spots are 

 much better developed than the lateral. The skin is covered with 

 minute white points, bearing pale hairs. The tubercular warts bear 

 stellate fascicles of black and pale hairs, and the abdominal incisions 

 are very distinct. The warts are as follows : (1) Dorsal (i and ii 

 united on each side of the mediodorsal line on each segment). 

 (2) Supraspiracular (iii). (3) Subspiracular (iv and v united). (4) 

 Marginal, just above base of proleg. These are placed four on either 

 side of, or eight in a transverse ring around, each segment. 



