Dros moreliense, comb. rest (=D periscele, n. syn.)

[Photos of this gall appear on page 6 of the pdf]

Basal stem conical, cup-shaped body expanding gradually from the stem; the upper edges of the gall are thin, which means that the gall does not retain a circular outline on the top; color varies between red and brown.

Galls small (up to 5.6 mm in diameter and 7 mm in height), sometimes very conical

Dros moreliense, n. sp.
Agamic form

Gall. — The cylindrical basal stalk rather slender, up to 2.5 mm. in diameter, short, expanding gradually into the cupped body of the gall; without an expanded, saucer-like base to the stalk; the upper edges of the gall rather thick; color dull brownish red; up to 6.5 mm. in diameter and 7. mm. high.

Host. — Quercus conglomerata [rugosa], Q. texcocana [deserticola].

Range. — Michoacan: Morelia, 14 E, 7000’ (Q. conglomerata), — Mexico: Mexico City, 12 W, 8500’ (Q. texcocana). — Probably widespread on all but the dwarf oaks in the states of Mexico and Michoacan.

Life History. — Adults in «spring» and April 10.

The gall is unique in the complex in lacking the flared or saucer-like base which, in all the other species, connects the stalk of the gall with the leaf. The species is therefore more readily recognizable than some of the others in the group.

Although the recorded localities (east of Morelia and west of Mexico City) are 120 miles apart, and although the hosts of the two collections are different (Q. conglomerate and Q, texcocana), we have other species of cynipids which show similar distributions and host relations.

Dros periscele, n. sp.
Agamic form

Gall. — The same as the galls of C. picatum and C. repicatum. Basal stalk tapered to a narrow point less than 2.0 mm. in. diameter, the cupped body of the gall expanding gradually from the stalk, the base somewhat wider than the. stalk, thin, plate-like; the upper edges of the gall about 1.7 mm. in width; color bright ox-blood to deep brownish red; up to 10. mm. in diameter and 11. mm. high.

Host. — Quereus macrophyIla [magnoliifolia].

Range. — San Luis Potosi: Rio Verde. 14 W, 6500’. Possibly restricted to a portion of the Eastern Sierra including the eastern mountains of San Luis Potosi.

This species, from the eastern mountains of San Luis Potosi, is very close to D. repicatum the range of which centers in Guanajuato. The two occur on the same host, Q. macrophylla.