— 
if 
—— + 
79 
gradually on the increase in Colorado for several years until the pres- 
ent season, when it was very abundant. The attack begins with the 
opening of the first buds, when the little, wrinkled clusters of leaves 
begin to appear from the terminal buds of small twigs upon the trunk 
and large branches of the tree. When these clusters reach a diameter 
of from 3 to 5 inches, they die and the lice migrate to other leaves, 
where they locate on the underside and cause them to turn yellowish or 
reddish in color and to roll under. These lice were abundant enough 
in many places, so that a large proportion of the leaves during July 
were rolled sufficiently to mar greatly the appearance of tie trees. On 
some trees large numbers of the lice were seen accumulated upon the 
thin bark surrounding injuries to trunk or limbs. At this date 
(August 5) the lice have nearly all disappeared, chiefly through the 
attack of Syrphus larve of one species, Syrphus americanus Wied. 
NOTES ON INSECTS OF NORWAY AND SWEDEN. 
By W. M. SCHOYEN, Christiania, Norway. 
I have the honor to present to the Association a few brief notes relat- 
ing to some of the more important noxious insects which have been 
observed the past year in our country. j 
The cereal crops have, as usual, suffered more or less throughout the 
country from wireworms, especially Agriotes obscurus and Diacanthus 
ceeneus, Which seem to be the most troublesome species here in Norway. 
Agriotes lineatus, elsewhere in Europe recorded as the chief mischief- 
maker among the Elateridw, is not so common with us as the other 
two species named. 
Oscinis frit did considerable damage in 1895 upon oat fields, especially 
in. the western districts, but in 1896 was little heard of. 
Chlorops pumilionis (teniopus), which usually here in Seandinavia 
attacks only the heads of barley, has now also been found attacking the 
wheat in just the same manner. 
Cecidomyia destructor has been observed infesting barley in different 
places, but fortunately not yet in an alarming manner. 
On grass fields the grubs of Phyllopertha horticola have been trouble- 
some here and there, and in a single place also the larvie of a species 
of Crambus. In the spikelets of Alopecurus pratensis the maggots of 
Oligotrophus alopecuri have occurred, and in those of Phlewn pratense 
the maggots in considerable numbers, of Cleigastra (armillata?), were 
found destroying the seeds. 
As the chief enemies of cabbage the past year may be named DPica- 
canthus ceneus, Tipula oleracea, Anthomyia brassicw, Silpha opaca, Pieris 
brassicae, aud Meligethes wneus. 
Carrots, parsley, and celery have suffered from the attacks of Psila 
rosw, onions from Tipula oleracea, and rhubarb from Syromustes 
marginatus. 
