TRIPH^NA SUBSEQTJA. 27 



tapering a little from the fifth segment to the head, 

 which is a trifle the smallest ; and the thirteenth seg- 

 ment tapers also a little, and is rounded off behind ; 

 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 trun- 

 cated ; through the middle of this row of diamonds 

 runs the very conspicuously wide 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 

 subdorsal stripe is almost as wide as the dorsal, but 

 is rather more 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 tuber- 

 cular 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 tran verse 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 separa- 

 ting them ; adjacent on the back, near the segmental 

 divisions, are a few fine longitudinal 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 longitudinal stripe running midway through it, 



