>'OTES 0-V BRITISH TRICHOPTERA. 131 



Mr. Parfitt did not notice that the affected larvfe constructed 

 their case in a peculiar manner, as do those species that are 

 preyed upon by ichneumons. The manner in which this fly 

 deposits its eggs is an interesting subject for investigation ; it 

 must be done when the case is floating on the surface, and 

 as it would seem to be impossible that it can penetrate the 

 mass of wood, gravel and shells, of which the case is formed, 

 it is possible that the egg is flxed outside close to the 

 entrance, and that the larva when hatched finds its way into 

 the interior and attacks its victim. Those species that are 

 attacked by ichneumons, have their cases usually fixed at 

 the bottom of shallow streams, where they can be reached 

 by the long ovipositors of the parasites, which probably also 

 pierce the cases from the outside, as they are not formed of 

 such firm materials. 



The species to be added to our fists, and which are noticed 

 in their places in the following notes, are — 



Ijitnnephilus hirsutus, Pict. (^nec Kolen.) 

 Jloj-monia basalis, Kolen. 

 HhyacophUa obliterata, n. s. 

 B. ?nu7ida, M*Lach. 

 Several others must stand over till another season, as I 

 am not yet able to determine them satisfactorily. 



Phriiganea minor, Curtis. In the beginning of July, 

 Mr. Barrett informed me that he had taken several of this 

 species near Haslemere, and a few days afterwards I visited 

 the spot with him. It was in a wood, and we found the 

 insect in profusion on the trunks of oak trees, which it much 

 resembled in colour. These trees stood round old gi-avel 

 pits then dry, but filled with dead leaves ; there can be no 

 doubt that these are the breeding-places, the female probably 

 depositing her eggs among the leaves, and tlie gelatinous 

 matter in which they are enveloped, keeping them from 



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