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Indiana University Studies 
larval cell central in the swollen portion of the gall, at first small with 
a distinct cell wall, held in place by rather dense, irregular, tangled, 
crystalline fibers; the larval cell finally up to 3.0 mm. in length, then 
filling a large part of the gall, the fibers being then compressed into a 
more solid mass. Attached usually to the veins, on the under side of the 
leaf, sometimes on the upper side or on the petiole. On Quercus dumosa 
and Q. durata. 
RANGE. — Known from Mendocino and Lake Counties southward in 
the mountains along the coast and in the Sierras as far as the Sequoia 
National Park. Figure 33. 
The interesting gall of this species is apparently not rare 
in an area including Mendocino and Lake Counties, but there 
are no records for what is technically Southern California 
even tho one of the hosts, Q. dumosa , is one of the common 
oaks in that part of the state. 
The gall of maculosa is not to be confused with that of any 
other cynipid, but the insect very closely resembles Cynips 
mirahilis, differing chiefly in having a shorter fourth antennal 
segment, less heavily clouded patches on the wings, usually 
several spots in the discoidal cell, and a smaller size. It is 
instructive to compare the descriptions of the two insects and 
note how dependent we are on the physiologic measure (the 
gall) for separating them. 
Cynips maculosa variety maculosa Weld 
agamic form 
Figures 33, 214, 221 
Cynips maculosa Weld, 1926 (in large part), Proc. U.S. Nat. Mus. 68 
(10) : 63 {not figs. 11, 44). 
FEMALE. — Color almost uniformly light brownish rufous, only the 
tips of the antennae and sometimes the abdomen a little darker; thorax 
rather slender, about twice as long as broad; the foveal groove narrow, 
shallow, not well marked oif from the rest of the scutellum, not sepa- 
rated into foveae; the abdomen more slender, almost twice as long as 
high; the expanded tip of the second abscissa of the radius of moderate 
size only; areolet of moderate size; length 3.1 to 4.3 mm., averaging 
nearly 4.0 mm., generally longer and more slender than tritior. Figures 
214, 221. 
GALL. — Very similar to that of variety tritior, more nearly spheri- 
cal; on leaves of Quercus dumosa. 
RANGE. — California: Sequoia National Park below Cedar Creek 
checking station (types, Weld coll.) . 
Probably restricted to higher elevations in the Sierras. Figure 33. 
