62 Annals Entomological Society of America [Vol. VII, 
Jackson merely quotes Cowen’s original description. 
Davidson, finding the name ranunculi preoccupied, suggests 
californicus instead. 
Essig lists this species both as populiconduplifolius and 
californicus. 
Dr. Patch records several captures of this species in Maine 
on the leaves of Populus balsamifera and gives a figure showing 
the distribution of the wax glands of what she took to be the 
stem mother, and also an excellent figure of the antenna of the 
alate fundatrigenia, or summer migrant. 
This is a rather common but not abundant species in north- 
ern Colorado and the writer has also taken it at Wheatland, 
Wyoming, upon a broad-leaved cottonwood. 
Fundatrix, Figures 1-4. 
The general color of the fundatrix is yellowish olive green, lightest 
over the middle area of the abdomen, more or less covered with a white 
powdery secretion and a few wax threads about the lateral margins and 
posterior portions of the body; head, eyes, antenne and legs, including 
coxee, black or blackish; in general form, broad oval; eyes small but very 
prominent; length 3.75 to 4.50, and width 2.50 to 3.00; hind tibia, .60; 
length of antenna about .70; 5-jointed; joints I, II and IV subequal in 
length, the fourth being a trifle the shortest; joint III barely as long as 
IV and V together with the spur; spur about half as long as joint IV; 
only permanent sensoria present and they are bordered with cilia. The 
arrangement of the wax plates upon the head and thorax is shown in 
figure 3, and is about as follows: 
Head with a pair of large circular plates on the vertex between the 
antenne; on the occiput a similar pair, not quite so large but somewhat 
wider apart, and midway between these a smaller pair, rather close 
together; on the prothorax four large plates in a transverse row, and 
two small ones in front of the middle pair; meso- and meta-thorax and 
joints 1-6 of the abdomen, each with a transverse row of 6 plates; joint 
VII with 4 plates; joint VIII with 2, and none on joint IX. It is not 
uncommon for two of these plates next each other to coalesce and so 
reduce the number. 
The fundatrix is never found in the leaves folded along the 
midrib in which the other lice occur, but is always found in a 
narrow fold on the margin of one of the first leaves to open 
and upon the under side, see figures 1 and 5a. The second 
generation, almost as soon as born, leave the pseudo-gall of the 
fundatrix and travel to the tenderest little opening leaves at 
the tip of the twig, where they locate, several to a leaf, upon the 
lower or ventral surfaces where they begin to feed, causing the 
