[ 9 ] 



arge, obtuse, split beneath ; vent linear, marginated with yellow — Found in the 

 woods of the highland hills of New- York. Length three inches. 



XII. N. G. Abacion. Differ from Narceus by anterior [Segments with two pairs 

 of legs ; neck hardly visible ; head rounded, eyes rounded, lateral ; antenna lon- 

 ger than the head, lateral before, straight, club shaped, six oblong articles in- 

 creasing in size upwards. — The name means little texture. 



52. Abacion tesselatum. Body reddish brown, striated longitudinally, or tesse- 

 lated ; antenna more than double the length of the head ; legs pale, variable in 

 number, about sixty pairs ; tail acute — I found it on the knobby hills of Estill 

 county in Kentucky, under stones : length nearly two inches. 



XIV. N. G. Symphelos. Body lanceolate, head, thorax and abdomen united in 

 one, without divisions, some faint appearance of segments on the abdomen ; six 

 legs ; antenna united in front, divergent, curved outwards, club shaped and nearly 

 nail shaped, the end being large and rounded. No visible eyes, nor palps nor 

 beak ^It belongs probably to the family Parasitia next to Osteophilus : the name 

 means united nails. 



53. Symphelos soUdago. Body smooth, lanceolate, acute behind, rounded in 

 front, mutic, whitish; antenna one-fourth of total length; legs as long as the 

 breadth of the body — An exceeding small animal only the fortieth part of an inch 

 in length ; found in the state of New- York on several species of the genus Soli- 

 dago. 



54. Trombidion croceum Entirely of a pale saffron colour; body elliptic, trun- 

 cate behind, back convex pilose ; legs arched, nearly equal, pilose; eyes brown, 

 nearly lateral — Found in the state of New- York in houses ;. length half a line, 

 eyes sessile punctif orm ; palps visible, straight. 



55. Acarus xanthopus. Body nearly elliptical and obtuse, smooth and red; legs 

 yellow, the anterior pair longer antennif orm, nearly as long as the body — One of 

 th^smallest insects, length about one hundred part of an inch, almost invisible to 

 the naked eye. — I found it on Long Island in the flowers of Monotropa uniflora. 



56. Acarus ampelos. Body oboval, obtuse, orange color ; legs pale, arched, 

 nearly equal — On the wild grape vines of the state of New York. Length the 

 twenty-fourth of an inch. 



XV. N. G. DiPLOTOXOPS, (Spider). Thorax rounded, the anterior pair of legs 

 longer, palps straight, club shaped; eyes in two arched rows on the forehead, 

 each with four eyes, convexity upwards, the upper bow with smaller eyes and 

 shorter — The name means eyes in double arches. They are wandering spiders. 



57. Diplotoxops bilineata. White, abdomen rounded-ellipsoidal, with two short 

 yellow parallel lines anteriorly, faintly ringed behind ; anterior feet nearly as 

 long as the body and arched — Not uncommon in many parts ; seen near Lake 

 Champlain, on Long-Island, the Alleghany mountains and in Ohio. Length one- 

 fourth of an inch ; abdomen double the size of the thorax. 



58. Diplotoxops f coccinea. Scarlet, legs black; the anterior ones hardly lon- 

 ger ; abdomen ellipsoidal obtuse — In the state of New- York, length only one- 

 twelfth of an inch. 



59. Lepisma saxatilis. Dirty and pale brown, antenna nearly as long as the bo- 

 dy ; filaments of the tail imequal, the middle one longer than the body and three 

 times as long as the lateral ones — Length one inch ; found on the stones in the 

 knobs of Kentucky, it springs and jumps occasionally ; feet medial, short, e- 

 qual. 



60. Termes montana. Black, antenna and tips of the legs fulvous, thorax semi- 

 cordate anteriorly. — It lives in the Alleghany mountains. They form large socie- 

 ties and build their nests in the fallen pine trees. The antenna are divergent, 

 straight, moniliform, jaws large, abdomen ringed obtuse, wings much longer, hori- 

 zontal, greyish ; length one third of an inch. 



61. Formica succinea. Entirely of a fine shining and transparent amber colour: 

 thorax with three knots ; abdomen oboval-elliptical ; antenna club shaped up- 

 wards, two fifths of total length — It lives in small societies of about one hundred 

 individuals, under stones in the knobs of Kentucky ; length about one-tenth of 

 an inch. Head large, rounded ; palps visible, antenna bent inwards, the first 

 knot of the thorax longer and bearing the legs. Larva white, oblong and pandu- 

 rate or bilobed. I have already observed about twenty species of Ants in the U. 

 States, mostly new ; I am preparing a monography of them. 



62. Cherm^s Silphium-trifoliaium. Elliptical, nearly truncate at both ends ; 

 length double the breadth, pale olivaceous green, back coBvex, undivided ; an- 



