August, ’23] 
SCIENTIFIC NOTES 
393 
circumgenital pores between specimens taken from willows in Gregory 
Canon, and those taken from Populus and Salix in Italy (Berlese and 
Leonardi; Chermotheca Italica) and Peach in Florida (Rolf and Quain- 
tance, Coccidae Americanae). This table was worked out according to 
the method of Mr. P. A. Glenn in an article, “Forms of the Oyster 
Shell Scale in Illinois, ’’Journal of Economic Entomology, April, 1920, 
13:173—177. From a comparison of the two tables, this scale in Gregory 
Canon comes under what Mr. Glenn calls the grayish brown or banded 
form. The Italian specimens from the Populus and Salix fall in with 
his yellowish brown form, and those from the peach, with his brown or 
apple form. In this table the mode represents the number of pores 
found to occur most commonly in any one group. The averages and 
modes in most cases are very nearly the same. The variation curves 
for the number of pores in the different groups of specimens from the 
willows were also worked out according to the method of Grace H. 
Griswold (1922). These curves indicated that the Gregory Canon 
scale belongs to the lilac form though the modal number is higher. 
Presumably, therefore, it is not to be found as an enemy to the apple. 
Circumgenital Pores 
Host Plant 
Num¬ 
ber 
exam¬ 
ined 
Posterior Lateral 
Anterior Lateral 
Median Group 
Total 
aver¬ 
age 
Max. 
Min. 
Aver. 
Mode 
Max. 
Min. 
Aver. 
Mode 
Max. 
c 
• H 
§ 
Aver. 
Mode 
Willow,Boulder, Colo. 
75 
32 
10 
21.94 
24 
30 
14 
24.28 
25 
16 
6 
12.95 
14 
105.39 
Willow,Boulder, Colo. 
17 
28 
19 
23.40 
24 
30 
21 
25.20 
25 
17 
11 
14 
14 
111.20 
Populus, Italy 
13 
17 
15 
15.73 
16 
24 
15 
20.90 
21 
13 
10 
11.16 
10 
84.42 
Salix, Italy 
16 
20 
12 
16.84 
16-17 
27 
15 
20.37 
18-19 
14 
10 
11.50 
12 
85.92 
Peach, Florida 
13 
25 
12 
14.16 
12-13 
22 
12 
16.43 
16 
11 
9 
10.54 
10 
71.72 
References 
Glenn, P. A. Forms of the Oyster Shell Scale in Illinois. Jour. Econ. Ent., 
April 1920, 13; 173-177. 
Griswold, Grace H. Are there two species of the Oyster Shell Scale. Annals 
Entomological Society of America, June, 1922, XV:184-191. 
Gillette, C. P. Letter of Jan. 9, 1923. 
Scientific Notes 
The Oriental Peach Moth, Laspeyresia molesta Busck. During the past two 
summers this insect has been noticeable on apple and peach. At times it has been 
more injurious than the lesser apple worm. This summer it has been found injurious 
especially on peach shoots, causing alarm to some orchardists in Adams County, Pa. 
S. W. Frost, State College , Pa. 
