[8] 
44. Cryplomera nem'/rn. Brown; Amvleen pairs fjf legs, tlie jjOaterior pair." 
very '"ng ; anter'na nearly as long as tlie body , large segments gibbose, rounded 
behind, scutiform. sides notched ; tail having two filaments as long as the body; 
length over one incli. — Found by Mr. Hayden in tlie cellars of Baltimore : seg- 
ments longer than broad. 
VIII. N. G. Stknomf.ka Differs from Cj-^/j/ojijerfi by narrow segments visible, 
not covered; the f!r.st segment is a narrow one; head oval, antenna setaceous, 
thick and approximated at the base. — Very near to Cvyptomeva -. the name means 
narrow parts. 
45. Stenomera interriipta. Antenna twice the lengtli of the head; fourteen 
pairs of legs, the posterior ones longer and thicker; sides deeply notched, tail bi- 
dentate. — I have found it near Hadley's falls (in 1816) on the Hudson river, on 
mushrooms, upon which it feeds probably. Length one and an half inches ; co- 
lour piile brown ; many of the large segments are slightly lunulate behind, all are 
broader than long. 
IX. N. G. Mtcotheres DifTers from Cryptonierahy all the segments equal and 
apparent, and head of various shapes, eyes lateral when visible, 8ic. — This genus 
differs from .Tnlus by having only one pair of legs to each segment. The name 
implies feeding on mushrooms, as most of the species do. There are many o9 
them in the United States. I shall merely mention three at present. 
46. J^lL/cntheres Oligopoda. Antenna one-tliird of total length, bent outwards; 
head rounded ; body attenuated behind ; seven pairs of equal legs ; tail bifid. — 
Found on the Luzerne mountains of New York, near Glen's falls. Length one- 
fourth of an inch, colour fulvous. It may be the type of a sub genus, Exocera. 
47. Mycotheres kucofvda. Antenna straight, one-fifth of total length ; head 
truncate body linear, fulvous, about twenty pairs of white legs, the posterior ones 
rather longer : tail bisetose. Found in the knobs ofKent'y. length less than 1 incii. 
48. Mycoih r?s vittata. Fulvous, a longitudinal brown streak on the back ; an- 
tenna moniiiform, longer than the head ; about fifty pairs of legs, almost equal; 
tail elongate obtuse, with a lateral setaceous appendage on each side ; head oval, 
pandurate, obtuse ; eyes lateral, visible, round. — A fine species about two inches 
long and one-twelfth broad. It may form a sub-genus Mem-.pleura. Found in 
the highlands of New York. The antenna have about fifteen rounded articles. 
Eyes black, almost inferior. I'he head and tail are not streaked. 
X. N. G. PiEunoLOMA. Body oblong, convex above, unable to contract into a 
globe ; many narrow segments, tiie middle ones larger, each with a marginal scale 
on each side and commonly two pairs of ventral legs, M-ith four articles and a cili- 
ated claw ; the first segment or neck nearly concealed and without scales or feet. 
Head short ; antenna lateral moniiiform, with six oblong articles, — A fine genns 
next to Glomeris : the name me*ins lateral margin. Hind legs shorter as in all the 
following three genera. 
49. Pleiirolonutf.avipes. Antenna grey, one-fifth of the body; head brown, 
transversely oblong ; eyes black, back blackish shining, marginal scales reddish, 
eighteen segments and only thirty pairs of legs ; belly, legs and tail yellow, tail 
mucronate. Length one and half inches ; eyes very small, lateral. — Found on 
the ground in the vvoods near Catskill in New York state. 
XI. N. G. NtRc Eus. Body cylindrical, with many narrow segments, each with 
two pairs of geminate legs, except the anterior segments which have only one 
j)air. Head obtuse with a visible neck; eyes anterior irregular ; antenna lateral 
hardly longer than the liead, recurved behind in a lateral groove, with six depres- 
sed articlas, the second longer, the last globular. Legs with four articles and a 
claw, ventral, the posterior ones rather shorter. Tail scutiform, mutic, concealed 
beneath. — Next to Juhis .- the name is mythological. 
_ 50. Jy^arceus linctoyiuj. Blackish brown, ninety pairs of feet, pale purple ; the 
six anterior segments witli a single pair ; fail obtuse, split beneath ; length about 
three inches. — It is found in the woods of Kentucky. When handled it dyes the 
fingers of a purjilish colour. Discovered by Mr.Tohn D. Clifford. 
XII. N- G. Ri!EXK\oR. Differs from JVarce.us by all the segments with two pairs 
of geminate ventral legs, havingfive articles and a cL-nv. Eyes rounded in facets. 
Aiitennr. nearly under the head, recurved upv.ards in a groove, with seven arti- 
cles ; siz oblong, the sixth larger, the seventh or last depressed obtuse. — The 
name is also Mythological. 
51. Rhexcno7- annularis. Bluish brown with reddish brown rings on the mar- 
gin of the segmcnts,legs brown, one hundred and ten pairs; neck broad, tail 
