Kinsey : Gall Wasp Genus Cynips 
275 
third winter after the galls started growth. Only stray indi- 
viduals emerged the first year after collecting our more 
northern material, and it is not certain that these did not 
come from old galls gathered with the new crop. On the other 
hand, all of our Kansas insects emerged the first year after 
collecting. If our determinations are correct, these data raise 
an interesting question as to the factors affecting emergence. 
Direct temperature affecting the developing larvae cannot be 
responsible for the date of emergence of the insects, for Michi- 
gan material kept in the mild climate of southern Indiana for 
thirteen months emerged in the middle of November, and 
Kansas material placed in the same breeding box outside our 
laboratory windows emerged from late December to late Jan- 
uary — in both cases near the dates they would have emerged 
in the normal environments. 
Our emergence dates for this insect are November 16; 
December 1, 4, 8, 10, 16, 18, 20, 22, 28, and 30 ; and January 
4, 5, 8, and 25. The emergence of the material from northern 
Indiana and Michigan ranged from November 16 to December 
20; that of the more southern collections began on December 
4, but was concentrated chiefly between December 12 and 
January 25. 
