lars, which live gregariously in their 
tent like web before mentioned. 
The apple tree generally suffers 
most from the tent caterpillars. In 
Uta 1, much damage is reported to 
apple, apricot, plum and currant in 
Salt Lake and Utah counties, some 
of the orchards being described as 
looking as if stripped bv fire. The 
pear and peach trees suffered no dam- 
age. 
Again, Mr. James Fletcher, in his 
report an Entomologist to the Cana- 
dian Government for 1887 writes. 
‘‘These caterpillars have appeared in 
great abundance all over Canada 
during the past season, and seem to 
attack the foliage of almost every 
kind of deciduous tree. ” In British 
Columbia similar damage was done, 
but it is to be noted that the eastern 
and western caterpillar belong to dif- 
ferent, though allied species. The 
best remedy to be employed tor these 
pests is to search for and destroy all 
egg-masses, which are quite easily 
seen, or after the eggs have hatched 
to remove the caterpillars in their 
webs, and destroy them. Paris Green 
may also be sprinkled over the foliage 
where they feed, if they are very nu- 
merous. 
The species to which our Custer 
county tent caterpillar belongs is not 
yet precisely ascertained; possibly we 
have more than one. Moths of the 
genus Clisiocampa were found com- 
monly by Swift Creek in 1887, and 
one of them, being sent to Mr. Henry 
Edwards, was identified as Clisiocam- 
pa californica, which is the parent of 
what is known as the western tent 
caterpillar. In June 1888, we sent a 
tent caterpillar to the Agricultural De- 
partment at Washington, and l^tr. L. 
O. Howard wrote concerning it, 
“Your larva of Clisiocampa or Popu- 
lus, is evidently not californica, as we 
have a good series of the latter species 
with which your larva has been com- 
pared. Your larva comes near one 
which we have received from Utah, 
but which has not yet been bred.” 
And later, a moth being sent, was re- 
ferred doubtfully to Clisiocampa in- 
curva. 
The tent caterpillar has an enemy 
in Custer county in a species of soli^ 
tafy wasp, scientifically named Am- 
mophila robusta. One of these was 
observed dragging a full grown cater- 
pillar which was "bigger than itself; 
the wasp had destroyed its conscious'* 
ness without killing it and was taking 
it as provender for its young. The 
wav in which the wasp contrives to* 
have her meat fresh for the infant 
maggot is graphically described by 
Sir John Lubbock. To prevent the 
inconvenience of struggling meat on 
one hand, or decomposing meat on 
the other, the mother^wasp performs 
very skilfully an elaborate surgical 
operation demanding accurate knowl- 
edge of the anatomy of the nervous 
system of caterpillars, which consists 
of a series of ganglia, a pair at each 
segment, and connected together by 
commissures running down the length 
of the body. The first step of the 
wasp surgery is to pjerce the mem* 
brane between the head and first seg* 
ment of the body and to sting the 
brain like ganglia of the head. This 
probably acts like the administration 
