488 Annals Entomological Society of America [Vol. VI, 



After about the 10th of August, these alate sexupara have been 

 common in the galls at Boulder, Fort Collins and Manitou, 

 being still common in the galls at the last named place as late 

 as September 20th, when there were still many larvae and 

 pupae. 



It is difficult to account for all the gall-mothers being 

 apterous in August and September, when we thought that 

 all we had noticed early in the season were winged or pupae 

 and solitary in the galls. Probably the explanation is that 

 the late part of the second generation, the young from the stem 

 mother, were apterous and remained to give birth to the two 

 forms that occur in the galls from about the last of July on 

 through the summer. These apterous gall mothers are cer- 

 tainly the parents of the alate forms (sexupara) that develop 

 with them in the galls during August and September. The 

 young larvas were still producing galls at Manitou, .August 

 9th and I found very young galls as late as September 20th 

 at Manitou this year. 



Late Apterous Form. 



Described from specimens taken at Boulder, August 31, 1913, by 

 L. C. Bragg, and at Manitou, September 20 by the writer. 



Upon some of the sprigs brought from Boulder young lice were still 

 locating on tender new leaves at the tips of the twigs for the formation 

 of new galls, though on most of the twigs terminal buds had formed. 

 Most of these galls contained a single apterous female that was readily 

 distinguished fropi the other lice in the gall by its being more orange 

 yellow in color. I found from eight to fifteen lice in each gall, staying 

 with their apterous mothers. The former were in many instances, 

 adult, and always winged when fully grown, and were also all sexupara. 

 These gall mothers were still giving birth to a few of the dark colored 

 young that migrate from the parental gall to form new galls on the 

 tender leaves. 



The adult apterous females in these galls were different from those 

 found at Manitou and Boulder earlier in the year, by being much smaller 

 and by having five jointed antennse (figure 7) instead of six in all of 

 the many specimens examined, the fourth joint being short and 

 bead-like, and the entire antenna very much resembling the antenna of 

 the fundatrix. The earlier forn;i also showed a tendency to combine 

 joints 3 and 4 and become 5-jointed. Length of body, l.SO; antenna, 

 .38; joint 3 as long as joint 5 with the spur; otherwise like the earlier 

 fonn. 



Sexupara. 



This form is rather markedly different from the Fundatrigenia by 

 being distinctly smaller b}^ having fewer sensoria on the antennae 

 (figure 5) and by having several lice living together in a gall along with 

 the apterous mother just described. 



