men somewhat similarly terminated, but not with the distinct 

 lobes that form so prominent a feature in our genus. In its 

 lengthened prothorax, and the shape of the abdomen, it widely 

 differs from Erioptera, and I can discover no difference in the 

 antennae of the sexes, which I fortunately secured. The neu- 

 ration of the wings is very different to any of the Tipulidaj 

 that I remember, and I think they must be too small for flight. 

 Probably many insects that inhabit very elevated situations 

 do not often use their wings, and I suspect mountain species 

 of many of the orders are not generally long-lived, in conse- 

 quence of the frequent wet, cold and high winds that assail 

 them. I remember in ascending Schichallion, that towards 

 the summit we found considerable numbers of the Ortliotdenia 

 (Tortrix) Bentleyana in the greatest perfection, but on the fol- 

 lowing day I did not see a specimen that was not worn and 

 faded as if it had been several weeks old. To the same cause 

 probably may be attributed the variation in the localities of 

 winged insects in different years ; for as we know that elevated 

 and exposed places are seldom free from the effects of the 

 wind, some Lepidoptera may move from one side to another 

 of a mountain to seek shelter, for if they were to conceal 

 themselves for any very long time, their lives would be too 

 short to fulfill the objects of nature ; the males of others take 

 wing at favourable opportunities, and in this way we saw num- 

 bers of the H. Cassiope caught in the wind and carried to 

 mountains quite out of our reach, and where the valleys are 

 wide they are no doubt transported to a great distance. Pro- 

 vidence has guarded however against a too great decrease by 

 casualties, for the females seldom taking wing, the eggs are 

 more likely to be deposited where the parents were produced, 

 and where the food that the caterpillars live upon is to be 

 found. 



For the beautiful plant figured, Gentiana verna (Spring 

 Gentian), I am indebted to George Wailes, Esq. who gathered 

 it at Teesdale widdy-bank, Northumberland, the middle of 

 April. 



