286 Mr. Foulton's further notes upon the 



Stage III. — After the second ecdysis the larvas very 

 much resemble the previous stage. The chief difference 

 is in the subdorsal, which has disappeared except 

 anteriorly, and is indistinct even where it is retained. 

 The horizontal stripe above the subdorsal is distinct, 

 and so are the prominent white spots on the thoracic 

 segments (one pair on each). This line has the same 

 relation to the 8th stripe, but the continuity is only 

 apparent, for careful observation shows that the latter 

 extends below the posterior extremity of the former. 

 This is also true of previous stages. At this time, and 

 in the second stage, the larva bears the closest resem- 

 blance to a Smeruithus larva in every respect, except the 

 dark colour of the horn and the shape of the head. In 

 this stage the larva habitually rests (still upon the mid- 

 rib) in the Spliinx attitude, which is also assumed, 

 though exceptionally, in the second stage, and is even 

 seen in the first. There is still a trace of the bifid 

 termination to the horn (see fig. 10, x 50, Plate VII.). 

 Shortly after ecdysis the colours darken in certain parts : 

 the pink horn becomes dark brown with black tubercles, 

 as before, the effect being nearly black, except at the 

 sides of the base. A black cloud appears on the side of 

 the head and extends downwards behind the yellow line 

 at the margin of the face. There is much variability in 

 this respect, some larvae having no trace of black on the 

 head. The spiracles are ochreous, as in the adult, but 

 more faintly. The true legs become red, and a dark 

 purplish margin appears round the claspers. The anal 

 llap has a white margin. The ground colour is yellowish 

 green above, darker green below, and this latter extends 

 upwards in front of the oblique stripes as a dark shading 

 for one-third of their length. (The depth of colour is 

 very variable). The shagreen dots are yellowish white, 

 those forming the stripes being much larger and whiter 

 than the others. At first the component dots of the 

 stripes arc distinctly separate, but later they enlarge 

 and fuse, producing the appearance of a white band, 

 upon which is a single row of tubercles, each emitting a 

 minute hair. These tubercles are the original shagreen 

 dots, and each is placed in the centre of a white area, 

 which has spread from the base of the former into the 

 ground colour. The areas form the white stripe, and 

 they can be readily distinguished, as each is situated 

 upon one of the secondary rings into which each 



