1917] Marchand—Notes on the Habits of the Snow-Fly (Chionea) 151 
is any special adaptation by tropism to the life on the snow, as 
apparently the case in Chionea. 
The species treated here was probably Bezzi’s Chionea alpina 
described by him in 1908, a few years before these observations 
were made. I conclude this from a comparison of my specimens 
with Bezzi’s description, finding the characters to agree pretty 
closely. Characteristic for Chionea alpina are: the color, being 
yellowish but darker than in lutescens, the thickened femora, the 
stiff bristle-like hairs on the legs, showing a distinctly serial arrange- 
ment, the seven-jointed antenne (eight in valga, nine to ten in 
araneoides) and the hairs on these which are, in lutescens, much 
longer than in the northern species. Moreover, the type-locality 
of Bezzi’s species, Chiareggio, Valtellina December 8, 1899), is 
not very far from my locality, and separated from it only by the 
Engadine valley. On the other hand, Bezzi records another 
specimen of Chionea alpina, which he received from the Silvretta- 
glacier, likewise in the Rhetic Alps and not far from the Davos- 
valley. The size of my specimens ranges from 2-4 (Q 5?) mm. in 
length. 
As far as I know, C. alpina has not yet been figured, and the 
accompanying imperfect drawings may facilitate comparison with 
other species. Bezzi states that in the female of Chionea alpina 
- the ovipositor is always curved upwards, a feature which, however, 
was absent in the specimen from Silvretta-glacier. My specimen 
did not show anything of this sort. Possibly, the ovipositor 
assumes this position after copulation has taken place or after ovi- 
position. Another characteristic which presents some difficulty is 
the number of antennal joints. I believed my specimens to be 
six-jointed, but Bezzi gives seven joints as the number in his species, 
the last two joints being discernible, as Lundstroem has pointed out, 
by the position of the bristles. I have made some drawings of the 
antennze, as accurately as possible, on which it is seen that they 
may be called seven-jointed, the last two joints being however 
fused into one. 
Note.— One of the two male specimens still in my possession was 
found to have lost all its legs during transportation, showing also in 
this peculiarity its relationship to the Tipulids. I notice that all 
the legs have broken off at the trochanter, the latter remaining at- 
tached to the coxa. It seems, therefore, that there is a predisposed 
