3S0' INSECTA. 



with two reddish lines along the back; fifty-four segments, the 

 penultimate terminated by a stout point with a liorny and hairy 

 extremity. Inhabits Europe, 



/. terreslris, L. ; Geoff., Insect. II, xxii, 5. A fourth smaller; 

 bluish-cinereous, picked in with light yellowish; forty-two to 

 forty seven segments. Inhabits Europe with the sab ulosus *- 



POLYDESMUS, Lcit. 



The Polydesmi resemble the luli in the linear form of their body, 

 and the spiral manner in which they roll up their body; but the seg 

 ments are compressed on the inferior sides, and have a projecting 

 ridge above, They are found on stones, and most commonly in Avet 

 places f . 



The species with apparent eyes form the genus Craspedosoma of 

 Leach %. 



The others have a very soft, membranous body, terminated by 

 pencils of little scales. Their antennae are equal. Such is the 



PoLLYXENUS, Lat., 



Which as yet comprises but a single species, placed among the 

 Scolopendrae — Sc. lacjuraX'., — by Linnaeus, Geoffroy and Fabricius. 



It is the lule a queue en pinceau of De Geer, Insect., VII, 

 xxxvi, !, 2, 3,; Zool. Miscel., cxxxv, B. Very small, oblong, 

 with bunches of little scales on the sides, and a white pencil at 

 the posterior extremity of the body. It has twelve pairs of feet 

 placed on as many semi-annuli. Inhabits cracks in walls, and 

 under pieces of bark §. 



FAMILY IL 



CHILOPODA ||. 



The antennae of the Chilopoda are more slender towards the extre- 

 mity, and consist of fourteen joints and upwards ; their mouth is 



* See the two memoirs of Savi already quoted, and Leach, Zool. Miscell., Ill, 

 for an account of these two species and some others that inhabit England. Add 

 Juhis indus, L. ; De Geer, VII, xliii, 7; Seb., Mixs. II, xxiv, 4, 5; — Seb., Mus. I, 

 Ixxxi, 5; — Schaet., Abhandl, I, iii, 7. [Add of the American species the/, impres- 

 sus, punctatus, annulatus, lactarius, marcjinatvs, and jmsillus.'] 



•f- The luU cumplanatus (Zool. Miscell. CXXXV, A), depressa, stigma, irideniaius. 

 Fab. ; his Scolopendrse ? dorsalis and chjpeuta. [Amer. species, P. serratus granula- 

 tus, Say, and the lulus rirginiensis, Drury.] 



X The species, unknown before Leach, appear to be proper to England. See pi. 

 cxxxiv of his Zoological Miscellany, vol. III. 



§ There is a second species, P. fasciculatus, Say, that inhabits the southern 

 section of the United States. See Jour. Ac. Nat. Sc. of Phil. II, part I, p. 108. 



II Chilopoda, Lat. or the genus Scolopendra, Lia, &c. 



