[ 8 ] 



44. CryptomerQ. nemura. Brown ; fourteen pairs of legs, the posterior pairs 

 very long ; antenna nearly as long as the body, large segments gibbose, rounded 

 betund, scutiform, sides notched; tail having two filaments as long as the body ; 

 length over one inch. — Found by Mr. Hayden in the cellars of Baltimore : seg- 

 ments longer than broad. 



VIII. N. G. Stenombra Differs from Crj/^towera by narrow segments visible 

 not covered ; the first segment is a narrow one; head oval, antenna setaceous, 

 thick and approximated at the base. — Very near to Cryptomera : the name means 

 narrow parts. 



45. Stenomera interrupta. Antenna twice the length 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 pale brown ; many of the large segments are slightly lunulate behind, all are 

 broader than long. 



IX. N. G. Mycotheres Differs from Crji^iomera by all the segments equal and 

 apparent, and head of various shapes, eyes lateral when visible, &c. — This genus 

 differs from Julus 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 of 

 them in the United States. I slaall merely mention three at present. 



46 Mycotheres OUgopoda. Antenna one-third 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 leticopoda. Antenna straight, one-fifth of total length ; head 

 truncate body Hnear, fulvous, about twenty pairs of white legs, the posterior ones 

 rather longer; tail bisetose. Found in the knobs of Kent'y. length less than 1 inch. 



48. Mycotheres vittata. Fulvous, a longitudinal brown streak on the back ; an- 

 tenna moniUform, 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 Nemopleura. Found in 

 the highlands of New York. The antenna have about fifteen rounded articles. 

 Eyes black, almost inferior. The head and tail are not streaked. 



X. N. G. Pleuroloma. Body oblong, convex above, unable to contract into a 

 globe ; many narrow segments, the middle ones larger, each with a marginal scale 

 on each side and commonly two pairs of ventral legs, with four articles and a cili- 

 ated claw ; the first segment or neck nearly concealed and without scales or feet. 

 Head short ; antenna lateral moniliform, with six oblong articles. — A fine genus 

 next to Ghmeris : the name means lateral margin. Hind legs shorter as in all the 

 following three genera. 



49. Pleuroloma flavipes. 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 



f the ground in the woods near Catskill in New York state. 



XL N. G. Narceus. Body cylindrical, with many narrow segments, each with 

 two pairs of geminate legs,, except the anterior segments which have only one 

 pair. Head obtuse with a visible neck ; eyes anterior irregular ; antenna lateral 

 hardly longer than the head, recurved behind in a lateral groove, with six depres- 

 sed articles, 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 Julus : the name is mythological. 



50. Narceus tinctorius. Blackish brown, ninety pairs of feet, pale purple ; the 

 six anterior segments with a single pair ; tail obtuse, split beneath ; length about 

 three inches. — It is found in the woods of Kentucky. When handled it dyes the 

 fingers of a purplish colour. Discovered by Mr John D. Clifford. 



XII. N' G. Rhexenor. Differsfrom Afarc^MS by all the segments with two pairs 

 of geminate ventral legs, having five articles and a claw. Eyes rounded in facets. 

 Antenna nearly under the head, recurved upwards in a groove, with seven arti- 

 cles ; six oblong, the sixth larger, the seventh or last depressed obtuse. — The 

 name is also Mythological. 



5 1 . Rhexenor annularis. Bluish brown with reddish brown rings on the mar- 

 gin of the segments, legs brown, one hundred and ten pairs ; neck broad tail. 



