222 ENTOMOLOGICAL SOCIETY third broader behind than in front, rather concave above, traversed by irregular low ridges, and two longitudinal lines rather nearer to the lateral margin than to the middle. Posterior abdominal shield much broader than anterior, its front border concave, broadly rounded behind, bearing above two scale-like hairs on the front border, four in a transverse line beyond the middle, and four more on hind border. Venter with large anal and genital openings close together. Legs very large and stout, first pair longest but plainly shorter than body, all roughened and clothed with clavate hairs, two on the front magin of the anterior trochanters are larger, spatulate and curved. The first leg is armed with stout erect, slightly curved spines, longer than the widths of the joints, two on the inner border of femur, three on the inner border or tibia, five on inner border of metatarsus; rather smaller and more curved ones on the lower outside margin of these joints. Palpi not very long, bristly. Two specimens collected by Mr. H. G. Hubbard, at Palm Springs, California. BIBLIOGRAPHY. FIG. 16. C<eculus americamis enlarged. (Original.) Dufour, L. Descript. and figure of Casculus echinipes. des Sci. Nat., XXV, 1832, p. 289, pi. 9, figs. 1-3. Gervais, P. Apteres, III, p. 260, pi. 38, fig. 5. Lucas, H. Explor. Algerie., p. 307, pi. 22, fig. i. Canestrini & Fanzago. Sul. gen. CaBculus, p. 477; ital., p. 75, pi. 2, fig. i. Berlese, A. Acari ital. Prostigmata, pi. 50, fasc. 50. Ann. Acarof. -Mr. O. F. Cook presented the following paper : NEW DICELLURA. By O. F. COOK. The genus Japyx Halliday has been recognized* as a distinct order under the above name. To the Japygidag is to be added a new family, Projapygidas, founded on Projapyx stylifer^ a new *Brandtia, p. 49, July, 1896. In October of the same year Mr. Ashmead published the. name Uratochelia for the same group in Volume III of these Proceedings, page 327. t See plate II, figs. 5a-5d.