b TRICHOPTERA. 



specific, will require thorough revision and modification. 

 The necessary drawings are all made, but I cannot here ex- 

 plain intelligibly in words, that which a few outline figures 

 will represent. B. Mauriis has been found rather abund- 

 antly at Dunkeld by Mr. Stainton ; hence it may possibly 

 prove to find a more congenial home in the northern parts 

 of our island. The insect referred by Hagen to Phryganea 

 minuta of Linne {Silo minutus, Kolenati), and noticed in 

 my Monograph at page 166 (foot-note), has occurred at 

 various localities. Mr. Eaton has erected a genus for its re- 

 ception, which he terms Bereodes (Annals and Magazine of 

 Natural History, June, 1867). Perhaps in so doing he is 

 right, as it is certainly somewhat distant from the other 

 species of Bercea ; yet each of these present notable differ- 

 ences in neuration and other structural characters. 



And now a few words on two species which remain as yet 

 unique, at any rate as British. Firstly, I will speak of Limne- 

 philus pavidus, Hagen (Trichop. Brit. p. 31). A male insect 

 from the northern part of the Scandinavian peninsula, now in 

 my collection, agrees sufiiciently with the type to cause me to 

 think it identical as a species {vide Stettiner Entomologische 

 Zeitung, 1867, p. 50). Hence, supposing the specimen in 

 the British Museum to be really of native origin, it is pro- 

 bable that the species should be sought for in the North 

 of Scotland. The second species, Stenophylax duhius of 

 Stephens, is, to my mind, yet doubtful as European. It pre- 

 sents characters which are not found in any certified Euro- 

 pean insect with which I am acquainted, but which are proper 

 to several (mostly undescribed) North American species. 

 Thus, while admitting its right, at present, to a place in our 

 lists, I cannot but feel a suspicion that it may have been 

 erroneously or accidentally introduced— time will show. 

 : The determination of the genus, the larvae of which form 



