COCCIDiE OF KANSAS, III. 
Oontribution from the Entomological Laboratory No. 72. 
BY S. J. HUNTER. 
With Plates XIII to XIX» iacltisive. 
<ltionffsjyis oi’f/iofobis Comstock. Pkate XIII, figs. 1, 2. 
On willow ( Salix sp. ) on bank of Kaw river, and cottonwood ( Popu- 
lus sp.) in the vicinity of Lawrence; also on willow (Salix) on Uni- 
versity camiius. 
Vli ioiifispis salicis-uiijr(v Walsh. Plate XIV, fig. 1. 
On willow (Salix sp.) near Lost Springs, Marion county, and on 
host of same genus near Greeley, Anderson county. 
In my study of these two species I have found the differentiation 
(when the mature female only was represented in the material at 
hand) attended by some uncertainty. In looking over the literature 
I find the same difficulty sometimes expressed. The distinctive 
characteristics of each I have endeavored to set forth. The com- 
parisons are based upon an abundance of material determined by the 
writer from the Kansas localities given, and upon the following from 
the Division of Entomology at Washington : Specimens of C. ortholo- 
hin from San Bernardino, Cal., the type locality, and C. salicis-nigne 
from Mankato, Kan., authentic matei’ial, which through the courtesy 
of Mr. C. L. Marlatt I have had the privilege of studying in this con- 
nection. 
C. orlholohis. C. salicis-nigrce. 
SCALE OF MALE. 
Without cariniv. I Tricarinate. 
E.vuviie dark yellow or brownish. | Exuvim pale lemon yellow or colorless. 
White. 
1.8-2.2nim. long. 
Exuviic yellowish brown. 
SCALE OF FEMALE. 
White. 
2.C-3.4 mm. long. 
Yellow or colorless. 
