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1914, Schroder Ins. Mitteleuropas 3 (3):45, 64, 69, 70. Bayer, 1914, Moravské Hâlky: 77. Houard, 1914, Marcellia 13:26. Hedicke, 1915, Sitz. Ges. naturf. Fr. Berlin 1915:260. Hedicke, 1915, Zeit. Insektenbiol. 11:23. Houard, 1915, Marcellia 14:99. Baudys, 1916, Verh. zoo.-bot. Ges. Wien 66: 81. Ross, 1916, Pflanzengallen Bayerns: 67. Houard, 1919, Marcellia 17:12. Houard, 1922, Marcellia 18:9. Houard, 1922, Marcellia 19:79. Baudys, 1925, Publ. Inst. Phytopath. Brno C39:28. Baudys, 1926, Bull. École Supér. Brno C7:42. Bischoff, 1927, Biol. Hymen.: 120, 489. Ross and Hedicke, 1927, Pflanzengallen Mit.- und Nordeuropas: 229.

FEMALE.—The entire insect (except the terminal halves of the antennae) with only a bit of darker rufous; the head hardly narrower than the slender and distinctly elongate thorax; the mesonotum with a very few, scattered hairs and punctation, but in large part smooth, naked, and shining; the anterior parallel and lateral lines hardly visible; the mesopleuron largely hairy and punctate with a smooth band above the center; the abdomen nearly twice as long as high, the second segment extending only half or two-thirds of the way to the tip of the abdomen dorsally; the tip of the second abscissa of the radius only slightly enlarged; the length 2.6 to 3.7 mm., averaging smaller than divisa but larger than agama. Figures 86, 105.

GALL.—Similar to the gall of divisa but only superficially spherical, distinctly flattened at top and bottom and therefore more or less cylindrical with an impressed tip on top, not strictly regular in shape; not much distorted on drying; up to 5.0 mm. in longest axis; largely smooth and naked, occasionally with a few irregularities on the surface; becoming a bright, more or less rosy brown in color. The thin outer shell with a distinct hardened (collenchyma) layer beneath, with some spongy parenchyma; much of the interior of the gall occupied by two cavities, the larger of which, located above, is an open chamber, while the larval cell is located below; the larval cell averaging 2.5 mm. in length, with a distinct cell wall which is inseparable on all sides except where it lies toward the open chamber of the gall. Attached to the veins on the leaves of Quercus pedunculata, Q. sessiliflora, and Q. pubescens. Records for other oaks may apply to distinct varieties. Figures 123124, 133-134.

RANGE.—England: Southern part (acc. Connold 1908). Huddersfield (acc. Mosley 1893). Saltash, St. Issey in Cornwall, Cann Woods, and Bickleigh Woods (acc. Bignell 1898).

France: Normandy (acc. Noury 1911). Alençon (acc. Houard 1915). Montargis (Leone acc. Houard 1914). Mezilles (acc. Houard 1902). Druyes in Yonne (acc. Houard 1922). Lorraine (acc. Kieffer 1901). Pertuis, La Motte-d'Aigues in Vaucluse, and Peypin-d'Aigues in Vaucluse (acc. Cotte 1912). Digne (Daumézon acc. Cotte 1912). Switzerland: Bern (acc. Uhlmann 1880). Germany: northern part (acc. Hartig 1840). Mark Brandenburg (acc. Hedicke 1915). Nassau (acc. Schenck 1865). Ruhla, and