340 
Indiana University Studies 
up to 24.0 mm. in diameter. The central core strictly spherical except 
where drawn out basally at the point of attachment; the surface of the 
core crystalline, very rough, scurfy, covered with short, straw-colored, 
crystalline hairs among which are the close-set, long, fine, hair-like 
spines which form the tangled, woolly covering of the gall, these spines 
up to 8.0 mm. in length, unbranched, wavy. The central core hard, 
crystalline, brittle, with an outer wall fully 1.0 mm. in thickness; all of 
the rest of the core (up to 5.0 mm. in diameter) is hollow, the inner 
walls being rough, irregular, without any other larval cell. Occurring 
singly or, more often, in clusters of two to five galls, the clusters usually 
more or less hemispherical but sometimes more elongate when contain- 
ing several galls; attached to the mid-veins, on the under surfaces of 
the leaves of Quercus arizonica, Q. oblong if olid, Q. Tourney i, Q. reticu- 
lata, Q. glaucophyllaU ) , and probably other related oaks. 
RANGE. — Known from Arizona and central Mexico. Probably 
widespread in Mexico, and to be expected in southwestern New Mexico. 
Figure 58. 
The gall of this species is one of the most attractive in the 
genus Cynips. The tangled mass of brilliantly colored, hair- 
like spines covering the spherical core marks the gall at some 
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ns 58 . 
FIGS. 57-58. CYNIPS CONICA, C. ARID A, C. NUBILA VARIETIES 
