The galls, though bearing separate numbers, had been placed together with galls of Amphibolips gainesi, and the galls of the species are superficially similar, but the gall of D. pruniformis differs in not being perfectly round and in being colored yellowish and reddish brown. The adults are typical of the species of Disholcaspis. They agree closely with the description of D. heynei Kieffer which was described (1910, Boll. Lab. Zoo. Gen. e Agr. Portici, IV, p. 113) from the adult only. They are to be distinguished from that species by their smaller size, by being bright reddish brown in color (heynei is described as rufous with the abdomen blackish brown), by showing a broad transverse groove at the base of the scutellum (this is narrow and indistinct in heynei), by having toothed claws (heynei was described as having "crochets simples"), and by details of thoracic configuration and wing venation. D. pruniformis has a smaller second abdominal segment than most species in the genus.
Disholcaspis unicolor, new species
Plate XXVII, Figures 40 to 43
Female.—Wholly golden rufous, without any black markings on the thorax or abdomen; median groove lacking; anterior parallel lines indistinct; a distinct foveal depression at the base of the scutellum; cubitus not reaching the basal vein but extending seven-eighths of the way to it. Head: bright golden-rufous, the tips of the mandibles piceous, rugoso-punctate, hairy, irregularly striate toward the mouth; antennæ hairy, golden rufous, shading into a brown on the last joints. Thorax: entirely golden rufous (without the black markings characteristic of D. cinerosa), punctate, covered with rather long, appressed hairs; parapsidal grooves deep, smooth, broad and convergent at the scutellum, becoming narrow and disappearing on the middle of the thorax; median groove entirely lacking; lateral grooves distinct, smooth, almost parallel with and as long as the parapsidal grooves; anterior parallel lines almost as punctate as the rest of the thorax and therefore not visible in most lights; scutellum large, rugose, hairy, with the deep foveal depression at the base less rugose and hairy than the rest of the scutellum and therefore distinct; pronotum punctate, very hairy, the hairs long; mesopleuræ less closely punctate than the rest of the thorax, hairy; metapleuræ largely golden rufous (not dark rufous or piceous as in D. cinerosa). Abdomen: large, uniformly golden rufous, the sides of the second segment, and the tip of the hypopygium hairy. Legs: entirely golden rufous, hairy, the tips of the tarsi, especially of the hind tarsi, darker or brown; tarsal claws toothed. Wings: with the microscopic hairs brown, the veins brown, the cross-veins heaviest; areolet large, almost a right-angled triangle; the cubitus not reaching the basal vein but extending seven-eighths of the way toward it; radial cell open; first abscissa of the radius angulate. Length: 4.2 mm.
Galls.—Large, globular bullet-galls (Figs. 40 to 43) with a nipple at the apex; rough, with a mealy covering when younger. Monothalamous. 21 mm. or less in diameter. Buff-brown in color when young, dark gray or black when old. Internally quite filled with a solid, woody tissue, the thick-shelled, egg-shaped larval cell separable but tightly enclosed in the younger gall, lying loose in a good-sized cavity in the mature gall. On the twigs of a species of Quercus, singly, or several near together.
