292 Mr. ^oiilton' 8 further notes upon the 



colour being as yet affected. The anniilation of the 

 segments is very distinct and continues throughout. 

 The 8th stripe is present. The markings are yellowish. 

 Weismann has stated that there are no markings on the 

 newly-hatched larvae. This is certainly the general 

 effect of the larvae, hut a lens and a good light will 

 prove that the markings are really present. 



Stage II. — In this stage the markings are whiter. On 

 the summit of the head are two prominent light red 

 tubercles ; these are only enlarged shagreen dots, and 

 each has a hair upon it. The apical tubercles are the 

 topmost of the two rows that form a marginal line 

 round the head as seen from the front. The horn is red 

 and bifid. It is covered with hair-bearing tubercles, 

 which persist upon it and upon the body throughout the 

 whole of larval life. The gradual spreading of a white 

 area from the base of a tubercle in the oblique stripes 

 is well seen in this stage. At the beginning the stripes 

 are only rows of separate tubercles, except where the 

 7th stripe enters the 8th abdominal segment. In this 

 case the ground colour is white from the first (and here 

 there is no annulation to keep the dots apart). Although 

 the tubercles enlarge in this stage they do not coalesce, 

 except in the 7th stripe, and here they ultimately 

 coalese where the stripe crosses the 7th as well as the 

 8th abdominal segment. The markings are exactly on 

 the plan of the adult, except that the subdorsal is faintly 

 continued posteriorly between the oblique stripes (and 

 even this, is sometimes present in the adult). The best 

 way of seeing the hairs of this larva is to hold it up to 

 the light and examine some surface {e.g., the back) in 

 profile with a lens. It is then seen to be densely covered 

 with very short hairs, each projecting from the summit 

 of a shagreen dot. 



Stage III. — Almost exactly similar to the last. The 

 subdorsal has disappeared, except anteriorly. The horn 

 is bifid in many cases, and is red above, faintly so 

 below, white at the sides. There is much variability in 

 the amount of red on the horn. The red tubercles on 

 the head are rather less defined in shape, and the colour 

 often sjjrcads on to the smaller tubercles near the two 

 large ones (see fig. 12, x B, Plate VII.). The 8th stripe 

 is barely indicated by a linear arrangement of tubercles. 

 There is a linear arrangement of dots on each side of 

 the dorsal vessel, which is very conspicuous when the 



