54 HADENA THALASSINA. 



inch and a half in length, cylindrical, and uniformly 

 plump, the head being rather smaller than the second 

 segment. The following are the three varieties 

 amongst them. 



Variety 1. — Reddish-brown above as far as the 

 spiracles ; a dull brown plate on the second segment, 

 through which the dorsal and subdorsal lines are 

 traced ; the dorsal line pale ochreous on the anterior 

 segments, but on the others much suffused with the 

 ground-colour, except at the segmental divisions, where 

 it reappears as an ochreous spot. The subdorsal line 

 ochreous, and much suffused with brown. On the 

 fifth segment to the twelfth, inclusive, a dorsal 

 diamond-shape of mottled brown, darker than the 

 ground-colour, and on each side a wedge-shape of very 

 dark brown pointing forwards, their broad ends a little 

 distance from the segmental divisions, their sides 

 edging the lower half of the diamonds and the sub- 

 dorsal lines. The wedge marks gradually increase in 

 size towards the twelfth segment, where they are 

 largest and darkest, and most conspicuous, by the 

 subdorsal line being there suddenly paler, and united 

 by a transverse pale line at the base of the wedges. 

 Spiracular line black, on which are the white spiracles, 

 and running immediately beneath is a pale greyish 

 stripe, its upper edge whitish, belly and legs brownish- 

 grey, head pale brown. 



Variety 2.— A rich cinnamon-brown, mottled with 

 ochreous above; belly and legs paler and greenish- 

 ochreous ; dorsal and subdorsal lines paler than the 

 ground-colour, but not very distinct, the diamond 

 marks hardly visible; the blackish wedge marks 

 strongly defined, but with the addition of two or three 

 fine streaks of ground-colour cutting transversely 

 through them all ; the tubercular dots black, in the 

 following order : a transverse row of eight dots on 

 the third and fourth segments, and on the fifth to the 

 twelfth inclusive, the anterior dorsal pair distinct, the 

 posterior pair hardly visible by being placed in the 



