492 Annals Entomological Society of America [Vol. VI, 



On July 15, 1913, the alate form was just beginning to acquire 

 wings about Laramie, Wyoming. At this time, the fundatrix 

 was still in the galls in a vigorous and active condition. 



Description of Fundatrix, Figure 13. 



The general color is a slatey gray, the body being covered everywhere 

 with a fine, white powder; the head, four spots in a transverse row on the 

 pro-thorax, the antennae and legs, including coxee, black; beak attaining 

 third coxce; joint 2 of the antenna (figure 15) about three-fourths as 

 long as joint 3; entire antenna, .40 long; apparently no gland plates 

 on any part of the body; permanent sensoria surrounded with ciliary 

 fringe; length of body 2.75. On the vertex, between the insertions of 

 the antennae, is a slight tubercle, which is not very prominent in the 

 fundatrix. 



Fundatrigenia, Figure 14. 



Apparently the young of the Fundatrix are all apterous, and their 

 offspring, the third generation, all alate sexupara. The other possi- 

 bility would be for the stem mother to give birth to two sets of offspring, 

 the earlier ones being apterous individuals which later give birth to the 

 sexupara, and the later ones developing into sexupara directly, which 

 does not seem at all probable. 



The adult apterous fundatrigenia is of a light straw yellow color 

 and more or less covered with white powder, but there seem to be no 

 tufts or patches of the waxy secretion upon the body; head including a 

 prominent frontal spine, eyes and tarsi blackish; dorsum of head, usually 

 four patches on the pronotum in a transverse line, legs and antennae 

 dusky brown; beak attaining third coxas; antennae (figure 16) 6-jointed; 

 third joint longest but barely exceeding joint six with the spur; joint 4 

 shortest, being about half as long as 3; length of body 2.50; antenna, 

 .62. This form lives in the gall with the stem female and other descen- 

 dants of the year. 



Described from specimens taken at Laramie, Wyoming, 

 July 15, 1913. 



Sexupara. 



General color, pale greenish yellow, with dusky head, antennae and 

 tarsi; thorax a little darker than the abdomen, length 2 to 2.25; length 

 of wing 2.75 ; length of antennae (figure 17) .90 ; median ocellus on a rather 

 prominent tubercle, cauda broadly oval; joints of antenna about as fol- 

 lows: third joint longest, a little shorter than 4 and 5 together; joint 4 a 

 little shorter than 5; joint 6 without spur equal to joint 5; sensoria very 

 indistinct; about 3 to 5 broadly oval sensoria on the distal one-third of 

 joint 3, one near the distal end of joint 4, and also the permanent sensoria 

 on joints 5 and 6 ; cilia about permanent sensoria rather weak, but always 

 present. The examples studied seem each to be able to give birth to 

 about twelve of the sexuales. 



