12 ENTOMOLOGICAL TRAVELS IN NORWAY. 



Twelve of the species are purely northern (without counting 

 the solitary Nepticula) ; the remaining 83 also occur in Ger- 

 many, nine of them in the region of the Alps. The six 

 Pterophorid(je belong altogetlier to the German Fauna, but 

 appear, however, in a somewhat different garb. 



Many species which are indicated by Zetterstedt as occur- 

 ring on the Dovrefjeld I did not meet with, and many others 

 may also occur which have remained undetected. In a 

 single summer, even with the most favourable weather, it is 

 not possible to investigate exhaustively so extensive a moun- 

 tain region, but here the labours of the collector are rendered 

 much more difficult by the unfavourable climate and the 

 almost constantly bad weather. The first days of June were 

 fine and warm, and during that period the greater part of 

 the large tracts of snow wdiich I had noticed on my first 

 arrival at Fokstuen melted, but from June 4th to the end of 

 the month it rained daily ; on the best days the morning 

 hours were fine, but towards 10 o'clock there came up black 

 clouds, which soon poured down rain or hail, and often we 

 had snow, yet the snow on the higher mountains rarely lay 

 long, and hindered my collecting less than the generally 

 very gusty storms. July was even w^orse, since I could 

 only designate in my journal two days as free from rain. 

 The most favourable times for collecting were those days on 

 which heavy showers and w^arm sunsliine prevailed alter- 

 nately. Storms hindered me the less here, since I confined 

 myself very much to Drivdale, which is sheltered by high 

 mountains, and to the old road, now going to ruin, between 

 Kongsvold and Drivstuen, Yaarstien, which though carried 

 at a considerable elevation, is also sheltered by high rocks. 

 The higher mountains in July were almost inaccessible, since 

 the daily fresh-fallen snow rendered the ascent dangerous, 

 and, besides, destroyed all insect life. The thermometer 



