258 THE entomologist's record. 



one, just below the middle of the oblique band, is black ; another black 

 one is on the upper margin of the yellow lateral band (and flange) ; 

 the others are white, some large, some small. There is, however, 

 really, no very definite grouping into regions by intermediate hairless 

 areas, except, to some extent, just below the dorsal group. The 

 reddish colouring, being divided by the two yellow areas noted, pre- 

 sents a narrow yellow band above the yellow flange, which sometnnes 

 seems to be a continuation of the oblique stripe of the preceding seg- 

 ment, or, in a yellower specimen, the red is reduced to two oblique 

 stripes, the lower all but horizontal. The black prothoracic plate is a 

 small islet, sunk in rather a hollow ; it is diamond-shaped, its long 

 axis transverse, its length about one-third that of the segment, and 

 its width about one-quarter that of the segment, nearly half the seg- 

 ment being in front of it ; this in a well-fed larva. The hooks of pi'o- 

 legs are as in previous skin, except that the two inner groups of hooks 

 are three or four in number, with one or two black points, and the 

 outer series have no definite hooks, but are two to four in number, 

 varying in each foot. 



/ Fonrtli instar (May 23rd) : — Length 6"5mm., quite Lycsenid, with 

 definitely hexagonal transverse section ; the three upper sides apparently 

 the larger, but so far as can be made out really not so (pi. xiii., fig. 3); the 

 width (when inactive) about2-2mm., seen dorsally it is a yellow caterpillar 

 with reddish-black markings, seen laterally a reddish caterpillar with 

 a few yellow markings. The level (?) dorsal side (of the hexagon) 

 presents down the middle line, beginning on the mesothorax, a dark but 

 reddish dorsal line to end of 6th abdominal, on either side of this, each 

 of these segments presents a rounded eminence of bright yellow (except 

 on mesothorax, where the yellow is overlaid by a brick-red shade), carry-* 

 ing many hairs. The 7th, 8th, and 9th abdominals slope backwards, and 

 cannot be said to show a differentiation into dorsal level or lateral 

 slopes, they are also of a tolerably uniform reddish colour, with darker 

 (but not so dark as in front) dorsal line. On the 7th and 8th abdomi- 

 nals the spiracles are very conspicuous as black spots, somewhat dorsal 

 on 7th, very much so on 8th. They are smaller but equally conspicu- 

 ous on the other segments, but less visible on a dorsal than a lateral 

 view. The prothorax presents the diamond-shaped plate, which, with 

 nearly black margins, has a yellow centre. The plate is small in pro- 

 portion to the segment, and is in a depression, the segment m front of 

 it swelling up into a large prominence, giving a curious lateral outline,, 

 and suggesting a false head (pi. xiii., fig. 4). The lateral flange is strongly 

 marked, and swells out at each segment, giving the lateral outline seen 

 from above a series of curves and not a straight margin. Its yellow 

 colour is obscured by a slight tendency to flesh -colour, which seems tO' 

 be reddish on the 7th and 8th abdominals. The same flange structure 

 passes round the posterior margin of 9th, and is here yellow ; this is not, 

 of course, lateral flange, but is continuous with it. The lateral slopes 

 between the yellow dorsal prominences and the lateral flange are yellow 

 as regards the portions of the dorsal prominences that pass down into- 

 the slope at posterior halves of segments. On the 2nd and 3rd thor- 

 acic, and 1st, 2nd, 3rd, 4th, 5th, and 6th abdominal, segments, is, on 

 each segment, an oblique narrow stripe, passing from top of slope in 

 front downwards and backwards to spiracle of following segment- 

 (except, of course, 2nd thoracic). In some degree as an actual fact, 



