REPORT OF ENTOMOLOGIST. 
9 
tection against these cutworms unless there are adjacent infested 
lands from which the worms may migrate into the borders of grow¬ 
ing crops. 
The clandestine cutworm, ( Noclua clandestina .) 
A dark brown, almost black species, without conspicuous mark¬ 
ings upon the wings, is also common each year in the north-eastern 
portion of Colorado, at least. It is a little later than the preceding 
species, the moths appearing about the lamps as those of Chon -- 
azgrotis auxilaris are becoming scarce. I have never known it 
to be nearly so numerous as that species. 
LEAF ROLLERS. 
The Fruit-Tree Leaf-Roller ( Caccecia argyrospila Walk.) 
[PI. I. Figs. E and F.] 
This insect in company with Caccecia semij erena , the boxel- 
der leaf-roller, has an interesting history in Colorado. Thirteen 
years ago both were destructively abundant in Northern Colorado 
in the vicinity of Fort Collins and Greeley. Their numbers have 
gradually grown less in that portion of the State until the past 
year or two, when they have not occured in sufficient numbers to 
attract attention much north of Denver, wdiile they are very de¬ 
structive to the foliage of fruit and box-elder trees in that city and 
in the vicinity of Colorado Springs. 
Many of the Tortricid moths vary greatly in color markings 
so that it is often impossible to distinguish between species without 
rearing the moths from single patches of eggs. There has been 
so much of this variation in the moths that I have been grouping 
under the name C. argyrospila that I decided to rear a few “fami¬ 
lies” from separate batches of eggs. Six egg-batches were placed 
in separate cloth sacks and each sack tied over a limb of a plum 
tree on April 23, when two of the patches, (numbers 1 and 5 of 
the following diagram) were beginning to hatch. These sacks 
were frequently examined and when the larvae were nearly grown 
the contents of each sack were brought into the laboratory and 
placed in a separate breeding cage and the transformations noted 
until the moths all appeared. The records of the six cages are 
given as follows: 
SUMMARY OF SIX BREEDING-CAGE RECORDS UPON TRANSFORMA¬ 
TIONS OF CACCECIA ARGYROSPILA. 
Cage numbers 
1 
2 
3 
~*4 
5 
6 
Began Hatching 
April 23 
did not 
April 23 
First Pupa 
June 2 
hatch. 
June 2 
June 2 
June 2 
Last Pupa 
June 13 
June 17 
June 11 
June 20 
First Moth 
June 15 
J une 13 
June 13 
June 13 
June 13 
Last Moth 
June 25 
June 30 
July 1 
J une 19 
June 29 
