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Show 670 MR. E. .r. M I E R S O N A C O L L E C T I O N O F [June 19, jelskii. It agrees well with Philougria in the transverse front, in which the median and antero-lateral lobes are obsolete, the subulated flagella of the external antennse, and the exposed uropoda, which have the inner ramus long, more than half the length of the outer. PHILOUGRIA NITIDA, sp. n. (Plate LXIX. fig. 3.) Oblong-oval, shining, very convex; segments closely articulated, with minute scattered granules. Head transverse, with the anterior margin straight, without antero-lateral lobes. Eyes black, granulated, and extending along the whole length of the lateral margins. Segments of the body subequal, lateral margins with a raised marginal line; posterior margins of the first three segments straight, and forming a right angle with the lateral margins; last four segments slightly excavate on the sides, postero-lateral angles acute. Third, fourth, and fifth (exposed) segments of the tail with the lateral part bent backward, almost at a right angle to the median portion of the segment. Terminal segment much broader than long, obtusely triangular, with a well-marked depression between the bases of the uronoda (which, however, is more conspicuous in some specimens than in others). Antennse shorter than the body, very slender ; flagellum three-jointed, and terminating in a long slender transparent filament. Legs very slender, with short hairs on the last three joints. Basal joints of the uropoda very short, terminal joint more than three times as long as the basal joint, acute. Colour purplish-brown ; with irregular yellow spots and patches. Length \ inch, breadth A inch. Hab. Peru, Guiana. Distinguished by its convex, shining appearance, the form of the head and of the terminal segment, and of the far longer slender terminal filament of the flagella of the external antennse, from the known species of the genus. The specimens from Guiana generally appear rather more coarsely granulated. Subfamily LIGIIN^E. LIGIA, Fabricius. LIGIA B A U D I N I A N A? ? Ligia baudiniana, Milne-Edw. Hist. Nat. Crust, iii. p. 155 (1840). Hab. Cayenne. As this species is only known to me by the short description of Milne-Edwards in the ' Histoire naturelle des Crustaces,' I subjoin the following description of the specimens from Cayenne. an opportunity of consulting Koch's account of the German species of Oniscidee, either in his ' Continuation' of Panzer's ' Deutschlands Insecten,' or in his ' Deutschlands Crustaceen.' Dr. von Martens (Zool. Record for 1868, p. 522), points out that the name Philougria should be spelt Philygria. As, however, the term Philygria was used in 1843 by Stenhamrnar for a genus of Dipterous insects, I retain the designation Philougria, albeit etymologically incorrect. |