1898] IIaRRIX(.T()X — KXIRA Ll.MITAI, IXSKCTS. I I9 



original fauna and late intruders. A considerable proportion 

 of our insects belongs to a boreal fauna which is more or less 

 circumpolar in its distribution, and of which many species pass 

 with little or no change of facics through the northern regions cf 

 Europe, x'\sia and America. In regard to such forms it is 

 consequently often impossible to declare positively whether they 

 belong to the original fauna or have been introduced since the 

 colonization of the countr\-. There are, however, man}' species 

 whose progress hither can be retraced successful!)- b\- the 

 records in entomological or agricultural publications. The times 

 and methods of their arrival are varied and numerous, and an}- 

 full discussion of them would be long, and to many wearisome. 

 Some, our settlers have carried among their goods and chattels 

 or even upon their persons, while man\' have come with their 

 beasts and fowls. Other forms living in less close communion 

 with mankind have worked their own passage hither afoot or 

 awing. Some come borne across long leagues of land and water 

 by the winds ; a few possibly upon the floods, although as our 

 streams flow usually to the east and south the currents are 

 mainl}' against the oncomers. In these latter daws of swift and 

 universal transit, when Ottawa is a great and growing railway 

 centre, the\- hasten to us both by freight and passenger trains. 

 They are introduced with our animals, our p'ants, our provi- 

 sions, with merchandise of divers sorts, and in wa\-s innumerable 

 and unexpected. 



A large proportion come as immigrants to occupy and 

 possess the land and to multipl)- their kind therein ; others arc 

 tourist visitors making summer excursions which terminate 

 generally in their premature death through cold or the lack of 

 proper nourishment. 



In addition to the species which have been introduced from 

 abroad, we may consider perhaps as extra-limilal insects certain 

 indigenous forms which occur but rarel\', or under special 

 conditions. Such for example arc the butterflies Thecla Augus- 

 tus Kirb}-, Thecla ti-iclaris Hub. and Chionohas Juttci. These 

 butterflies have been captured in the Mer Bleuc, but are species 



