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NOTES ON BRITISH TRICHOPTERA, WITH 

 DESCRIPTIONS OF NEW SPECIES, &c. 



By R. M'Lachlan. 



In the few remarks on the Trichopfera in the last *' Annual," 

 I had to complain of the almost total neglect of the study and 

 even of the collecting of these insects. On this my second 

 appearance, I have very great pleasure in withdrawing such 

 complaint. During the past season I have received great 

 assistance, in specimens, from numerous Entomologists, 

 with several of whom I had no previous acquaintance, and 

 some of whose existence I was totally ignorant. From 

 many distant parts of the country boxes have come, con- 

 taining insects in this order; and by this means, combined 

 with my own exertions, not only has my collection been 

 increased to nearly a hundred species, but considerable in- 

 formation has been gained as to their geographical dis- 

 tribution, a subject on which we are still in a state of great 

 uncertainty. But there are two quarters of which we at 

 present have little or no information ; I allude to Ireland 

 and the extreme north and islands of Scotland. From the 

 south-western portions of Ireland we might look for species 

 that have their metropolis in the sunny climes of Spain and 

 Italy ; while, on the other hand, it is not improbable that 

 in the north of Scotland arctic forms may occur, some of 

 which, as is the case with many boreal species, may be com- 

 mon to both continents. That in almost anv localitv there 



