Page:New species and synonymy of American Cynipidæ.pdf/15

 spherical, averaging 7 mm. in diameter, and is covered with a very dense pubescence of dark reddish-brown hairs less than 1 mm. long; this covering is quite distinct from the longer, fewer hairs which form the main covering of the gall. The walls of the central core are almost 1 mm. in thickness, and the rest of the core is taken up with the large larval cell. Singly, or more often in groups of two, on the under surfaces (less often on the upper surfaces) of the leaves of a species of Quercus.

—Mexico: San Luis, Potosi (Palmer Coll.).

—Two female and twenty-eight gall cotypes, in the Museum of Comparative Zoology, and in the author's collection, and cotype galls in The American Museum of Natural History. I cut the type females from the galls which were collected by Dr. Edward Palmer in September 1878.

The gall is very distinct. The character of the second segment of the abdomen and some other characters of the adult will place ft in Dryophanta if that genus can be maintained. But for the time, until we have discovered the true lines of relationships, it seems best to describe the species under the meaningless name of Andricus.

Andricus marmoreus, new species Plate XXIV, Figures 22 to 24

—Mostly bright rufous, the sides of the thorax and coxæ piceous to black, the mesopleuræ irregularly coriaceous, the abdomen microscopically but completely reticulate. yellowish rufous, darker on the face toward the bases of the antennæ, the tips of the mandibles piceous; irregularly and finely shagreened, with scattered hairs which are longest and densest on the extreme sides of the head and on the face toward the mouth-parts. Antennæ 14-jointed, hairy; joints one, two, and part of three light yellowish rufous, shading into the brown of the following joints. mesonotum bright rufous with piceous or black on the very edges, rather regularly coriaceous, sparsely hairy; a median ridge from the scutellum to the pronotum being irregularly coriaceous, only slightly elevated, this becoming a depressed, smooth, very short groove at the scutellum; anterior parallel lines smooth, slightly elevated, and extending half-way to the scutellum; parapsidal grooves fairly deep, extending to the pronotum; lateral lines rather broad, rather smooth, neither elevated nor depressed, extending well forward toward the pronotum; scutellum bright rufous, piceous on the edges and the sides, cushion-shaped, deeply rugose, sparsely hairy, with the two deep foveaT at the base smooth, separated by only a very fine ridge; pronotum bright rufous to piceous, darkest anteriorly, irregularly rugose, sparsely hairy; mesopleuræ piceous to black, the upper third deeply and irregularly rugose, hairy, the lower two-thirds coriaceous, with a spot of rufous red, with few hairs which are longest and most dense at the lower edge. quite uniformly bright rufous red, somewhat darker at the posterior edge, very evenly and completely covered with a mitroscopic reticulation, with a few scattered hairs; the second segment large, covering most of the abdomen; the ovipositor sheaths'very narrow and short, hardly as wide as an antenna, hairy. coxæ piceous, femora rufo-piceous, tibiæ and tarsi yellowish rufous, the tips of the tarsi black, tarsal claws simple. yellowish-tinged, quite hairy; veins brown, heavy, both branches of the cubitus fine and yellowish, a slight cloud on the basal vein and a prominent cloud around the apical portion of the subcosta and the first abscissa of the radius; areolet moderately large, almost an