( xli ) 



slightly more thick-set in the thorax than P. stratiotata and 

 its proboscis and legs project some way beyond the end of the 

 abdomen. The second, third and fourth abdominal segments 

 bear raised spiracles. 



Fig. 1. 



Dorsal view of larva. 



" The larva constructs flat, silken tunnels over the surface 

 of the rocks and fastens little pieces of green alga, upon which 

 it feeds, into the structure. The alga grows and gives the 

 tunnels a cryptic appearance. When full-grown the larva 



