Page:New species and synonymy of American Cynipidæ.pdf/17

 brown. the tips of the tarsi and the tarsal claws dark brown and toothed. veins brown, the cross-veins, subcosta, and radius moderately heavy and dark brown; areolet large; cubitus fine but reaching the basal vein; radial cell open, first abscissa of the radius angulate. 2.7 mm.

—A large mass (Figs. 25 to 27) of wool, about hemispherical, 2.0–3.5 mm. in diameter, lemon-yellow to bright orange-brown; the hairs crystalline, brittle, forming a coating on the central core almost 10 mm. thick; the core polythalamous, of a dense, crystalline material, without separable larval cells. On the midvein, on the upper sides of leaves of an oak, Quercus macrophylla Nee? (Prof. Jack det.).

—Mexico: “mountains near Guadalajara” (Bassett); Sierra de Nayarit, Jalisco (Diquet Coll.). Guatemala: San Geronimo (Cameron).

—Four females and nine galls, in the collection of The American Museum of Natural History, and in the author's collection. The galls were collected by Mr. L. Diquet in 1900, and deposited in the collection of the American Museum; the females were cut from the galls in January 1919, and consequently none of the insects are perfect specimens.

The gall is a splendid thing and inust be very attractive if at all abundant in its range. The recorded stations are over one thousand miles apart, for apparently this is the same species of which Cameron and Bassett have described the gall, though neither obtained the adult. Bassett said that the host of his galls was probably Q. crassifolia. The insect belongs to the Andricus-Callirhytis-Cynips group of ill-defined genera.

Andricus pellucidus, new species Plate XXIII, Figures 19 to 21

[No name, gall only], 1873, Hayden Report U. S. Geol. and Geog. Surv., p. 567, No. 1.

—Mostly bright chestnut-rufous, the posterior portion of the abdomen rufo-piceous; thorax with distinct parapsidal grooves, but other lines essentially absent; wings with brownish patches in the apical cell, the radial cell short, rounded, clear, cubitus reaching the basal vein but without any thickening at the point of union. bright chestnut-rufous, ocelli of the same color, mouth-parts slightly darker, compound eyes black; head very unevenly rugose, or variously sculptured, with a few whitish hairs; antennæ 14-jointed, mostly of exactly the same color as the face, but somewhat darker at the tips. of the same chestnut-rufous color as the head (yellowish rufous in one specimen), the entire thorax quite uniformly colored or only slightly darker on the sides; mesonotum punctate, and with some other irregular sculpturing, and hairy; parapsidal grooves distinct, convergent at the scutellum, continuous to the pronotum; median groove absent, anterior parallel lines and lateral lines absent or with only faint traces discernible; scutellum small but elongate, irregularly rugose, sparsely hairy, with two large and broad foveae at the base which are shining but rugose, only narrowly separated; pronotum irregularly rugose; mesopleuræ rugoso-striate with a small area which is almost smooth. smooth, shining, rufous, the posterior half, especially dorsally, a rich rufopiceous, the second segment with a few scattered hairs basally and laterally, and a tuft of long hairs on the tip of the hypopygium; the second segment tongue-shaped,