310 On the Diptera of the Amber-fauna.’ 
of their progeny, in open and sunny spots, and hover about these’ 
lants, or at least in their neighborhood, with great pertinacity. 
species; and we involuntarily ask, In what sort of a climate lay 
this paradise for long-legged gallinippers and impudent gnats? 
If we had any reason to consider the now extant amber-diptera 
as representatives of a district fauna in general, instea of 
pte 
as to the number of species as well as individuals, the g of 
rarity of Asilide, and still more of the Bombylida, the absence 
all Nemestrinida, etc., would undoubtedly have indicated 4 cli- 
in such a case have been but of little importance, as even now 
the higher latitudes harbor some forms of this kind. I believe 
Mt nemocera will lose the importance which it other ee 
would have had; for also in present times, localities of here 
indicated description, even in much lower latitudes, show ™ 
