Extracts from letters regarding Brazilian caddis-flies. 75 1 



which, no doubt, form a new genus (Peltopsyche). The larvrc live in fixed flat 

 shield-like cases, resembling the egg-cases of Neplielis, transversely striated in 

 one species (P. Sieboldi}, smooth in the other (P. Maclachlani). The antennae of 

 the male are very curious, and very different in the two species. Spurs 2.4.4. 

 The antennae of P. Sieboldi are i3-jointed in the male, and the number is pro- 

 bably the same in P. Maclachlani; in the female the joints are more numerous 1 ). 



"C/iimarrha? The larvae of some Rhyacophilidce (Chimarrha? ) live in 

 movable cases. These larvae remove the ventral wall of their houses before fixing 

 them to some stone. 



"The number of species of Trichoptera that I have seen here, cither in the; 

 larval or perfect state, is about forty." 



i) The structure, and especially the habits, of Peltopsyche differ so much from other Hydroptilidce 

 that one is tempted to doubt if it really belong to the family. - - R. M'L. 



