Andricus maxwelli

Quercus stellata
Stem galls, detachable
Polythalamous galls similar to those of Andricus murtfeldtae in size and shape. Often only a single gall on a tree. 1 to 27 adults emerged from a single gall in Apr. Some galls produce males others females, a few both.

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Described from an unknown oak. As det. by Patterson the gall is produced at end of twigs of Q stellata. The type galls in Philadelphia resemble those of murtfeldtae above. From one to 27 adults were reared from a single gall; 16 galls yielded males. 18 yielded females, 7 gave both. Of 15 similar galls on Q breviloba all but two gave flies of one sex. The types are not murtfeldtae.

Andricus maxwelli n. sp.

Galls polythalamous, but rarely containing more than half a dozen larvae. Globular or oval, though sometimes somewhat irregular in shape. From three-eighths to five-eights of an inch in diameter, yellowish brown to dark brown, mostly smooth and shining, but some of ray specimens are slightly rough and opaque. Internally, of a soft pith-like cellular tissue and without distinct larval cells. I received these galls many years ago from Mr. W. R. Maxwell, of Palestine, Texas, but did not learn from what species of oak they were collected, nor whether they were leaf or twig galls, though they are probably the latter.

Described from 12 specimens reared in April, 1877.