sjjecies of Western Pacifie Rhopdloecrd . 359 



protuberances pointing forward over the head on each 

 side, and forming a kind of hood ; dorsal surface greyish 

 white, with a black bar across the 4th and 5th segments ; 

 subspiracular and ventral region black, subdorsal white ; 

 branched spines upon each segment, those on the anal 

 segment being the longest, and pointing backwards. 



After the first moult the markings of the larvte remain 

 much the same, but the ear-like protuberances are not 

 so conspicuous, and assume a spiny appearance, and 

 the white spines have become reduced to small, fleshy, 

 wart-like tubercles of a reddish-brown colour upon all 

 the segments but the 6th, 7th, 12th, and 13th, where 

 they are white. 



After the second moult there is a marked difference in 

 the appearance of the larva ; its whole surface is of a 

 glistening reddish-brown colour, and the 3rd, 4th, and 

 5th segments have become much thickened ; the spines 

 upon the 2nd segment, projecting over the head, are of 

 a creamy white, and a nuchal Y-shaped tentacle is 

 emitted between them when the larva is irritated ; there 

 is an oblique whitish stripe on 8th and 9th segments, 

 and an irregular whitish subdorsal spot on the 11th and 

 12th segments, and a narrow shining white subspiracular 

 line. At this stage of its existence the larva has a 

 peculiar slimy appearance, its skin looking as if it was 

 too tight for it. 



After the third moult the larva somewhat loses this 

 shining peculiarity, and more nearly approaches its final 

 dress, the reddish brown giving way to mottled greens, 

 greenish yellows, browns, and reds. 



The full-grown larva is from 50 mm. to 55 mm. long, 

 rather stout and plump in proportion to its length, and 

 with the 3rd, 4th, and 5th segments considerably 

 thickened ; there are two small pointed tubercles upon 

 the crown of the 2nd segment, just behind the head, 

 and from between these, when the larva is annoyed, it 

 protrudes its peculiar Y-^^i^H'^d nuchal tentacle, which 

 is of a bright carmine colour ; there are also three or 

 four small blunt tubercles on each side of the dorsal 

 line on the 3rd, 4th, and 5th segments, and faint 

 indications of tubercles on each side of the dorsal line 

 on the remaining segments, those on the anal segment 

 being conspicuous and pointing backwards. The whole 

 colour of the upper surface, as far as the spiracular 

 stripe, a beautiful apple-green, mottled and marbled 



