156 SEVENTEENTH Report STATE ENtTomMoLocist oF MINNESOTA—1918 
one species upon hickory and butternut in New Jersey and the larva 
of another species is reported as found upon the leaves of elm. The 
iarva of Xycla minor has been found on pine. The larvae feed on the 
leaves of the numerous elms found along the walks on the College 
Campus at Saint Anthony Park. The adults are very inactive, so 
much so, in fact, that they will lie still and allow themselves to be 
crushed under foot on the walks. When they are disturbed in such a 
way as to be compelled to use their wings, they have a slow lumbering 
Fig. 31. Tenthredinid larvae, Craesus latitarsus Nort. on birch, showing a char- 
neteristic attitude—From lIIlymenoptera of Connecticut. 
flight and soon alight again; that is, the generalized condition of their 
wings, as regards the number and arrangement of their veins and 
trusses is confirmed by field observations, and proves that this insect 
not only has wings that are poorly fitted for 
a rapid flight, but that in fact it is an ex- 
tremely poor flyer. 
This is a small family embracing five gen- 
era and a limited number of species which 
are confined mainly to the American fauna. 
It is easily separated from all other Hymen- 
optera by the presence in its wing of the 
free part of the vein R» The family con- 
tains, at least so far as their wing vena- 
; 4 ; Fig. 32. Cimbex americana 
tion is concerned, the most generalized Leach. Another position as- 
‘S sumed by saw-fly larvae.— 
Hymenoptera known. From Hymenoptera of Con- 
necticut. 
