486 Annals Entomological Society of America [Vol. VI^ 



In this Bulletin Dr. Patch has evidently overlooked the funda- 

 trix or stem-mother and her gall, and has described an apterous 

 second generation female instead. 



The fundatrix of this species is undescribed and apparently 

 has been unrecognized until the present year (1913). 



On June 4, 1910, Mr. L. C. Bragg took a leaf of Populus 

 angustifolia bearing the fundatrix gall, but its identity was not 

 suspected until the gall (Plate I, figure 1) was discovered by 

 the writer the past summer and associated with the production 

 of the galls at Manitou and Colorado Springs on June 25th. 

 At these places the galls were taken just as the second generation 

 lice were beginning to leave the galls, which they do soon after' 

 birth, to go in search of the very young tender leaves at the 

 tips of the twigs, upon which they locate, one in a place, along 

 a line about midway between the midrib of the leaf and one of 

 its margins, on the under side. The small galls on the tender new 

 leaves were first seen, and a search for the source of the lice pro- 

 ducing them resulted in the discovery of one of the pocket-like galls 

 containing the fundatrix and a few of her newly born young, on 

 a full grown leaf well down on the stem. This quickly solved the 

 mystery as to the source of the lice that were producing the 

 galls on the tender new leaves. In the next two hours a hand- 

 ful of these galls with their inmates were collected, and they 

 were located in nearly every case by first. finding the galls on 

 the terminal leaves. At this time, most of the stem mothers 

 had not begun to give birth to the young gall makers at Manitou. 



The fundatrix gall, Plate I, figure 1, is very similar to the 

 somewhat smaller galls of the later generations, (figures 9 and 

 10) averaging about 10 mm. in length, and is closed except for 

 a narrow longitudinal slit opening below, which allows the young 

 to escape as they are born. None of these young stay to feed 

 with their mother in the gall. 



Description of Fundatrix, Plate I, figure 2. 



General color, slatey gray, due to a white powdery covering 

 everywhere upon the surface of the body, without cottony threads, or 

 with a few, only, about the lateral and posterior margins of the bod}''. 

 Beneath the powder, the body is of a dull, yellowish, olive green; head 

 legs and antennae blackish; body about 3.50 long by 2.25 broad; antenna 

 (figure 3), .52; hind tibia, .45, hind femur, .55; beak very short, not 

 attaining the second pair of coxae; joints 3 and 5 of the antenna sub- 



