58 lAugust, 



a little from tlie fifth segment to the head, which is a trifle the smallest ; 

 and the thirteenth segment tapers also a little, and is rounded off be- 

 hind ; the segmental divisions are slightly indented ; the smooth skin 

 has a velvety appearance. The ground colour is greyish-brown or pale 

 drab ; on the back of each segment is a much darker and rather olive- 

 tinted mark of a diamond shape, with the points truncated ; through 

 the middle of this row of diamonds runs the very conspicuously vade 

 dorsal stripe of bright ochreous-yellow, which, at each end of the body, 

 becomes narrower, and is relieved throughout by a very fine black 

 edging ; sometimes a faint cloud of greyish appears in the middle of 

 this dorsal stripe, but this is oftener met with in the earlier stages ; 

 the sub-dorsal stripe is almost as wide as the dorsal, but is rather 

 uiore of a greyish-yellow, and clouded faintly with greyish along the . 

 middle, and it is well relieved on its upper and lower edges by a thin 

 darker line ; close along the upper edge, in contact with it, is a series 

 of oblong, square black marks, each mark situated on the anterior 

 portion of a segment, those on the third and fourth segments being 

 narrower than the rest and rather wedge-shaped, that on the twelfth 

 extending the whole length of the segment ; the tubercular marks on 

 the back are black, and three on either side of the dorsal stripe in each 

 segment and in the post-thoracic segments are thus arranged : — the 

 middle one of each three is seen as a dot, sometimes faintly confluent 

 longitudinally, and the other two are merged within transverse 

 narrow bars of black, the one in front at the segmental division, 

 the other behind the square black mark previously mentioned, only the 

 slenderest interval of the pale ground colour separating them ; adja- 

 cent on the back, near the segmental divisions, are a few fine longitu- 

 dinal streaks of greyish yellow : the ground colour of the side, as far 

 as the spiracles, is the same as that of the back, with a darker longi- 

 tudinal stripe running midway through it, more strongly tinged with 

 darker brown at the beginning of each segment ; the very broad sub- 

 spiracular stripe is pale ochreous at its upper and lower edges, rather 

 greyish-ochreous along the middle, bearing a couple of brown freckles 

 on most of the segments ; the upper edge of this stripe is well defined 

 by a very finfe brown line, on which are the spii'acles, small and white, 

 either simply outlined with black, or placed in fusiform black blotches, 

 which gradually increase in size to the twelfth segment ; the belly has 

 a faint, indistinct, central, paler longitudinal line, and a few freckles 

 of the same paler tint, but its general colour, as well as that of the 

 legs, is a little deeper in tint than the sub-spiracular stripe ; the ven- 

 tral legs bear a couple of small brown dots, and are tipped with hooks 



