Kinsey: Gall Wasp Genus Cynips 
423 
intermediate between scelesta and macrescens occur in the same locality. 
The holotype is one of the smallest and most uniformly piceous of the 
type series. 
This is the sub-Canadian variety of the species; to be ex- 
pected everywhere on the most northern rim of the range of 
Quercus macrocarpa. The extreme form of the insect is dis- 
tinguished more readily than any of the other eastern varieties 
of hirta. On the other hand, the hybrid of scelesta and opiwu 
is the widespread macrescens, and thruout more southern 
Michigan every transition occurs between scelesta and ma- 
crescens, while further south scelesta appears here and there 
as a segregate in the hybrid population. Since the host, Q. 
macrocarpa, does not extend into the true Canadian zone, it is 
FIG. 72. NORTHERN VARIETY OF CYNIPS HIRTA 
possible that a pure population of scelesta has not been main- 
tained north of the area of hybridization. 
Our emergence dates for this insect are November 20 and 
December 1, 4, 8, 12, 15, and 22. 
Cynips hirta variety macrescens, new name 
(— C. hirta scelesta x opima?) 
agamic form 
Figures 70, 316, 329, 384, 428. 
Biorhiza macrocarpae Gillette, 1889, Psyche 5: 221 [credited to Bassett; 
without description]. 
Acraspis macrocarpae Bassett, 1890, Trans. Amer. Ent. Soc. 17:84. 
