of some So7ith Brazilian Trichoptera. 139 



HYDROPSYCHIDJE. 

 Genns I. Maceonema. 



The larva of one species is extremely common, being 

 met with ahiiost everywhere under large stones. The 

 larva makes a very rude dwelling with irregularly-accu- 

 mulated and loosely-connected stones. The case of the 

 pupa is by far more solid and regular, at least Avhen 

 viewed from Avithin. The inner room is oval, the surface 

 smooth, and the stones of the wall firmly connected. At 

 either end a few small openings may be detected, leading 

 through the wall. Within the case there is a cylindrical 

 silken cocoon, Avhich is loosely connected with, but may 

 be easily separated from, the walls of the stone-case, and 

 which has a transverse sieve at either end. 



Genus II. TiNODES (?). 



Cases similar in general appearance to those of Tinodes 

 maciilicornis are very common on rocks exposed to the 

 spray of waterfalls. They consist of a soft silken ribbon 

 interwoven and covered with microscopical alg^e, diatoms 

 and mud, and curved into a semicylinder. These canals 

 without a basal wall can hardly be called " tubes." The 

 larva is remarkable for . its very long spinneret, which 

 projects beyond the head. I have not yet seen the imago. 



Genus III. 



I do not know the imago ; in the pupa I found 2, 4, 4 

 spurs. The cases, of which I have seen but very few 

 specimens in the Kiver Itajahy, are interesting on account 

 of their close resemblance to those of the Hydroptilideous 

 genus Peltoj)syche ; indeed, before I had an opportunity of 

 examining the larva3 and pupjB I supposed them to be 

 some new species of Peltopsyche, or even unusually large 

 specimens of Peltopsyche MaclaclUani. They are flat, 

 elliptical, smooth, buff-coloured shields, with a small 

 opening at either end, fixed to the upper side of stones. 



