Kinsey: Gall Wasp Genus Cynips 
135 
TYPES. — 8 females, no galls. All the types temporarily in the 
Kinsey collection. Labelled Bromme, Denmark; gall September 29, 
1927; E. B. Hoffmeyer collector. 
This insect is known from only two localities in Denmark, 
but we have additional insects which are intermediate be- 
tween atrifolii and folii from Strodam, Stiznaes, Moesgaard, 
and Basnaes in Denmark (all Hoffmeyer coll.). The probable 
occurrence of atrifolii in a pure population in more northern 
areas of Europe is indicated by the occurrence of such north- 
ern varieties in other species of Cynips in both Europe and 
America. 
Cynips (Cynips) longiventris Hartig 
agamic and bisexual forms 
AGAMIC FEMALE. — The entire insect rich rufous and piceous 
(Central Europe) to entirely black (more northern Europe) ; the head 
slightly narrower than the more slender thorax (Central Europe) or 
practically no narrower (more northern Europe) ; the mesonotum largely 
punctate and hairy (more Central Europe) or largely naked (more 
northern Europe) ; the abdomen not more than half again as long as 
high, strongly produced dorsally, the tip of the second segment ap- 
proaching the tip of the abdomen dorsally ; the tip of the second abscissa 
of the radius not bent, usually triangulate but never large; the length 
1.9 to 3.8 mm. in two varieties. 
The Central European variety longiventris (q.v.) is nearly identi- 
cal with C. folii folii and close to C. divisa divisa of the same region; 
the more northern variety forsiusi (q.v.) is very near C. folii atrifolii 
and C. divisa atridivisa of that region. 
BISEXUAL FEMALE AND MALE.— As described for the genus 
and subgenus (q.v.). Differing from the bisexual forms of other species 
of European Cynips in having the legs duller yellow with the femora 
more or less piceous and the mesonotum and mesopleura entirely smooth 
and shining. 
AGAMIC GALL. — Of moderate size, spherical or somewhat el- 
lipsoidal, solid, spongy, but harder than folii. Very regular in shape, 
only younger specimens becoming distorted in drying; up to 11. mm. in 
diameter; externally (usually) smooth and naked, occasionally with 
small, blunt projections on the gall; yellowish-green, then yellow or 
reddish in color, banded with irregular, concentric, rose-colored, pur- 
plish rose, darker brown, or purplish brown bands. The outer shell 
thicker, harder than in folii, distinguishable from the compact mass of 
radiating, much branched fibers that fill the gall; this mass not show- 
ing the lines of radiating fibers. The larval cell central, oval, averag- 
