96 LIFE STORIES OF AUSTRALIAN INSECTS. 



is Notonatolica; another Helico psyche, which makes 

 a snail shell tube into which it retires on resting, and 

 this species is only found in running streams. 

 Another is Hy dropsy chc, which lives in a home made 

 of a few pieces of gravel, etc., grouped together on 

 rocks. 



Observations on the Larvae of Caddis-flies. 



{Notonatolica.') 



We obtained some larvse of caddis flies from a 

 stream in a gully at Thornleigh, in May. We 

 brought them home and also some sand and water 

 weed (Callitriche) and placed them in a glass bowl, 

 and spent some very enjoyable hours watching 

 them. At night we put the bowl out in the garden 

 near some cannas, and each morning brought it 

 in and placed it in the sunshine. The larvae which 

 were resting when first brought in, soon became 

 lively as the warm sunshine played on the bowl, 

 and set to work in a very business-like way to get 

 breakfast. 



The cases were about half an inch to one inch 

 in length (according to the age of the larva.) Each 

 case (Plate 13, Fig. 7) was narrower at one end,j 

 for as the larva develops it increases the size of th< 

 case. It was made of little scraps of stems, leavesj 

 etc., cemented with interwoven threads to form 

 complete bag-like canal, for, at the posterior enc 

 was a clear piece of woven material with a litth 

 circular hole in the centre ; there were only a fe^ 

 "scraps" sewn in on the edge. (Plate 13, Fig. 7a. 

 This would allow of circulation of water throu^l 



