350 
INSECTA. 
with two reddish lines along the back; fifty-four segments, the 
penultimate terminated by a stout point with a horny and hairy 
extremity. Inhabits Europe, 
I. terreslris, L. ; Geolf., Insect. II, xxii, 5. A fourth smaller; 
bluish-cinereous, picked in Avith light yelloAA'ish ; forty-tAA^o to 
forty seven segments. Inhabits Europe Avith the sabulosus ■* * * § . 
PoLYDESMUS, Lat. 
The Polydesmi resemble the luli in the linear form of their body, 
and the spiral manner in Avhich they roll up their body; but the seg 
ments are compressed on the inferior sides, and haA'^e a projecting 
ridge above. They are found on stones, and. most commonly in Avet 
places f . 
The species Avith apparent eyes form the genus Craspedosoma of 
Leach 
The others have a A’ery 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. lagura,lj., — by Linnaeus, Geoffroy and Fabricius. 
It is the Iide a queue en pinceau of De Geer, Insect., VII, 
xxxvi, 1, 2, 3,; Zool. Miscel., cxxxv, B. Very small, oblong, 
Avith bunches of little scales on the sides, and a Avhite pencil at 
the posterior extremity of the body. It has tAvelve pairs of feet 
placed on as many semi-annuli. Inhabits cracks in walls, and 
under pieces of bark §. 
FAMILY II. 
CHILOPODA ||. 
The antennae of the Chilopoda are more slender toAvards the extre- 
mity, and consist of fourteen joints and upAvards ; 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 
luhis Vidus, L.; De Geer, VII, xliii, 7; Seb., Mus. II, xxiv, 4, 5; — Seb., Mus. I, 
Ixxxi, 5; — Schaet., Abhandl, I, iii, 7. [Add of the Amei'ican species the/, impres- 
sus, punctatus, annulatus, lacfarius, marginaius, and pusillus.'^ 
•f- The luli cumplanatus (Zool. Miscell. CXXXV, A), depressa, stigma, tridentatus. 
Fab. ; his Scolopendrae ? dorsalis and clypeata. [Amer. species, P. serratus granula- 
tus, Say, and the lulus virginiensis, 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 Scolopendru, Lin. &c. 
