Cynips (aggregata) tigrina, new species
agamic form

GALL.-Moderate in size, up to 28. mm., but averaging nearer 20. mm. in diameter, the globular body drawn out into a very short, abruptly truncate stalk at base; light yellow to pinkish or rosy tan, very conspicuously spotted and irregularly striped with rich purple, usually dusted with a bluish puberulence; occurring singly, rarely in twos or threes, attached to the main veins of the leaves. Figures 9, 86.

HOST.-Quercus nudinervis.

RANGE.-Guerrero: Taxco, 8 NE, 8000' (types). Possibly extending over a much wider area in Southwestern Mexico, but so far known from only the single locality in Northeastern Guerrero. Figure 84.

LIFE HISTORY..—Adults: March 18, 25. April 1, 2. The bulk of the emergence late in March and early in April.

The gall is spectacularly spotted with purple, and is unique in the complex in being located on leaves instead of on stems. This leaf gall provides the evidence that the stem-oviposition common in the complex was derived from leaf-ovipositing ancestors. See the introduction to the whole complex for a further discussion of the relation of this insect to the bulboides and dugèsi stocks.

- Alfred Kinsey: (1936) Origin of higher categories in Cynips^©