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Show 254 INSECTA. !-list. des Insect., II, xxii, 3; Panz., Faun. Insect. Germ., L., xiii; Leach, Zool. Miscel., cxxxvii( 1 ). The others have at least twenty-one. pai.rs of feet, and the segments both above and underneath are equal In stzc and number. SooLoPENDRA, Lin. Those which form the two feet that immediately follow the two hooks forming the exterior lip, present but twenty-one pairs and . . . . ' whose antennre have seventeen JOints, constltutmg the genera 8coto. pendra and Crytopa of Leach. There are eight distinct eyes, four on each side in the first, and that in which the largest species are found; in the second, they are null or but very slightly visible. The most southern departments of France and other countries of the south of Europe, produce a species-Scolopendra cingulata, Lat.; Sc. moraitana, Viii., En tom., IV, x~ 17, ISwhich is nearly as large as the common species of the Antilles, but has a more flattened body(2). Those which form the genus Crytops, Leach, have rougher antenncc than the Scolopendrre, and their two posterior feet are more slender. Leach mentions two species found in the environs ofLon· don(3). In such as form the genus Geophilus, Id., the number of feet is more than forty-two, and often considerably so. The antennre consist of but fourteen joints, and their extremity is less tapered; the body is proportionably narrower and longer. The eyes are but slightly apparent. Some of the species are electrical( 4). ORDER II. THYSANOURA. This order consists of apterous Insects, supported by six (1) L. variegatua, ltcvilabrum, Leach, Lin. Trans., XI. See also vol. III of his Zoological Miscellany. (2) Scolopendra morsiians, L.; De Geer, Insect., VII, xliii, 1. For the other species, see Zool. Miscell., Ill; the Scolopendra gigantea, L ., Brown, Jam., XLll, 4, and other large but imperfectly described species. ( 3) Orytops hortensis, Zool. Miscell., CXXXIX, Id., I b.; Orytops Savignii. (4) S. electrica, L.; Frisch., Insect., XI, viii, I;-S. occidentalis, L.; List.Jtin., TIIYSANOUUA. 255 c t that experience no metamorphosis, and have, in addi- 1.e e ' particular organs of moti.o n e.t th er on t h e S.I d es or t h c tJOn, extremity of the abdomen. FAMILY I. LEPISMEN £, Lat. Setiform antennre divided from their origin into very numerous and small joints; mouth furnished with very distinct and salient pal pi ; each side of the under part of the abdo· men provided with a range of movable appendages, in the form of false feet ; abdomen terminated by articulated setre, three of which are the most remarkable ; body always covered with small shining scales. It comprises but one genus, the LEPISMA, Lin. The body of these animals is elongated and covered with small scales, frequently silvery and brilliant, from which circumstance the most common species has been compared to a little Fish. The antennre are setaceous and usually very long. The mouth is composed of a labrum, of two almost membranous p1andibles, of two bipartite jaws, with a palpus consisting of five or six joints, and of a quadriemarginated lip bearing two quadri-articulated palpi. The thorax is formed of three pieces; the abdomen, which is somewhat narrowed at its posterior extremity, is furnished along each side of the venter with a range of small appendages, supported by a short joint, and terminating in silky points, the last of which are the longest; a sort of scaly compressed stylet, composed of two pieces, issues from the anus; then come the three articulated setre, which are extended beyond the extremity of the body. The feet are short and frequently have very large strongly compressed coxre resembling scales. Several species conceal themselves in the cracks in the frame work of windows, under damp boards, in wardrobes, &c. Others retire under stones. vi;-S. plwsphorea, L.-it fell from the clouds on the decks of a vessel one hundred miles from the continent. See Zool. Miscell., IlL Geopltilus maritimua CXL, 1, 2;-G. longicornis, tab. cad., 3-6, and some othel' 11pecies. |