females live over winter on the trees and deposit clusters of 
brownish eggs, all of which are attached to the twig or to 
each other by means of slender silken threads. The writer 
has found over 400 eggs in a single cluster. The eggs hatch 
about the first of June at Fort Collins and the young lice, 
according to the observations of Mr. R. A. Cooley of the 
Mass. Agricultural College, go at once to the bases of the 
young leaflets where they insert their beaks and suck the 
sap which causes the peculiar growth mentioned above. I 
have seen the galls on silver spruce, only, in Colorado, and 
have seen them most abundant near timber line on the 
mountains. 
Remedies — Probably the best remed}^ is to collect and 
destroy the galls during the latter half of June and early in 
July, before the lice escape from them. Where very abund- 
ant, it would pay to make an application of kerosene emul- 
sion or whale-oil soap in about double the ordinary 
strengths during the latter half of May. 
What appears to be another species of Chcrmes, lays its 
eggs in great numbers on the leaves of Douglass spruce dur- 
ing the month of May. The female, while laying the eggs, 
secretes a quantity of white waxy threads which so surround 
the egg-clusters that the latter are hardly visible. The eggs 
hatch at PArt Collins about the 25th of May and the little 
dark-colored lice locate on the leaves. A twig showing 
these egg-clusters covered by the waxy secretion of the lice 
is shown in the accompan3fing illustration. (See Fig. 35.) 
Remedies — I have been completely successful in de- 
stroying both eggs and lice by applications of either kero- 
sene emulsion or whale-oil soap in double the ordinary 
strengths. In the ordinary strengths, the majorit}' of both 
lice and eggs were killed. 
MILKWEED BEETLE. {TrtvaopcH f('iiiorafu>> Lecont.) 
Injuring \ oung Nursery and I'orestry d'rees. 
A plantation of young foresti*}' trees set out on the Col- 
lege grounds by the Department of Agriculture, Division of 
PArestry, has been badly injured by the above l)eetle. My 
attention was first called to the injuries by Professor Cran- 
dall who brought me a s|)ecimen of the beetle doing the 
work. The beetle did the damage by cutting transverse 
gashes in the tender stems and in the petioles of the leaves. 
A great many gashes were usually cut in each stem, causing 
them to die or break over. In many of the gashes eggs 
