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Show 676 MR. E. J. MIERS ON A COLLECTION OF [June 19, PORCELLIO, Latr. PORCELLTO SWAMMERDAMII. Porcellio swammerdamii, Audouin, Explic. des Planches de Savigny, Egypte, Crust, pl. xiii. fig. 6, p. 98 (1809). Porcellio alexandrinus, Brandt, Conspectus Monogr. Onisc. p. 180 (1832); M.-Edw. Hist. Nat. Crust, iii. p. 172 (1840). Hab. Egypt. In the single adult example (length nearly 5 lines) the colour is deep blackish-brown; in this specimen the flagella of the external antennse are missing. The other specimens are much smaller, and of a much lighter brown colour. They agree well with Savigny's figure of the species, except that the granules are less strongly marked. Subgenus PORCELLIONIDES. P O R C E L L I O HISPIDA, sp. n. (Plate LXVIII. fig. 5.) Convex, elongate, oval-oblong, everywhere closely covered with minute stiff hairs (which under a low magnifying-power might be mistaken for granules). Head small, transverse, antero-lateral lobes broad, prominent, rounded, and obtuse. Segments of the body all rounded at the junction of the anterior and lateral margins, posterolateral angles of the first three segments of the body obtuse and rounded, of the remaining segments subacute; posterior margin of the seventh segment concave, and sliglitly sinuated on the sides. Segments of the tail short and bent backwards on the sides, posterolateral angles acute ; terminal segment triangular, with the sides slightly concave, subacute at the extremity. Antennse short, the last two joints (flagellum) together shorter than the antepenultimate joint, the terminal joint a little longer than the penultimate joint. Uropoda short; the terminal about twice the length of the penultimate joint, and projecting for about half its length beyond the terminal segment. Colour light brown and light yellow variegated. Length 5\ lines, breadth 2\ lines. Hab. Mongolia. This species is remarkable for the minute stiff hairs which clothe the narrow oblong body, the small size of the rami of the uropoda, &c. Family C Y M O T H O I D ^ E. L I R O N E C A , Leach. L I R O N E C A DAURICA, sp. n. (Plate LXIX. fig. 4.) Broadly ovate, depressed. Head very small; front prominent, rounded, and concealing the bases of the antennse, but not inflexed. Eyes small, red. First segment of the body rather the longest, anterior margin concave, with scarcely any trace of antero-lateral lobes. Following segments with the coxse small, and inserted in front of the antero-lateral angle of the segment, postero-lateral angles of all the segments rounded; last segment very short, and almost semicircularly excavated. Tail small, of equal width throughout, not half the width of the third segment of the body ; terminal segment but little broader than long, smooth, with the posterior margin |